Section 4 SE Tables - Results from the 2024 National Survey on Drug Use and Health: Detailed Tables, SAMHSA, CBHSQ

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Table 4.1D – Past Year Initiation of Marijuana Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Marijuana Use, and among Past Year Marijuana Users Aged 12 or Older; by Demographic Characteristics, Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	162	155	0.06	0.05	0.11	0.10	0.26	0.24
AGE GROUP
12-20	103	87	0.25	0.22	0.30	0.27	1.16	1.13
21 or Older	135	127	0.05	0.05	0.11	0.10	0.24	0.22
12-25	106	97	0.18	0.16	0.25	0.23	0.65	0.61
12-17	73	66	0.28	0.26	0.31	0.28	1.87	1.93
12-13	18	22	0.23	0.27	0.23	0.28	6.26	*
14-15	55	31	0.56	0.35	0.61	0.38	3.51	3.36
16-17	55	56	0.58	0.59	0.70	0.71	2.41	2.48
18 or Older	144	138	0.06	0.05	0.11	0.11	0.24	0.22
18-25	80	72	0.23	0.21	0.43	0.38	0.61	0.56
18-20	62	55	0.47	0.42	0.72	0.65	1.31	1.29
21-25	54	53	0.24	0.23	0.50	0.48	0.60	0.60
26 or Older	127	113	0.06	0.05	0.11	0.10	0.27	0.23
SEX
Male	102	101	0.07	0.07	0.14	0.14	0.31	0.29
Female	127	111	0.09	0.08	0.15	0.14	0.43	0.37
SEX/AGE GROUP
Male 12-17	55	46	0.41	0.35	0.44	0.38	2.83	2.96
Female 12-17	50	43	0.39	0.34	0.44	0.38	2.57	2.42
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.1P – Past Year Initiation of Marijuana Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Marijuana Use, and among Past Year Marijuana Users Aged 12 or Older; by Demographic Characteristics, P Values from Tests of Differences of Percentages, 2024 Versus 2023
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	da		0.0084		0.0137		0.0033
AGE GROUP
12-20	da		0.0076		0.0082		0.1008
21 or Older	da		0.1859		0.2294		0.1018
12-25	da		0.0016		0.0018		0.0068
12-17	da		0.0084		0.0103		0.0146
12-13	da		0.5127		0.5120		*
14-15	da		0.0001		0.0001		0.0037
16-17	da		0.5519		0.6406		0.3859
18 or Older	da		0.1265		0.1607		0.0707
18-25	da		0.0735		0.0559		0.1551
18-20	da		0.3485		0.2612		0.9642
21-25	da		0.0885		0.0857		0.0860
26 or Older	da		0.5204		0.5858		0.3635
SEX
Male	da		0.1768		0.1930		0.1121
Female	da		0.0218		0.0350		0.0123
SEX/AGE GROUP
Male 12-17	da		0.0130		0.0178		0.0029
Female 12-17	da		0.2076		0.1971		0.5404
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.2D – Past Year Initiation of Cigarette Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Cigarette Use, and among Past Year Cigarette Users Aged 12 or Older; by Demographic Characteristics, Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	95	93	0.03	0.03	0.07	0.07	0.20	0.20
AGE GROUP
12-20¹	73	64	0.18	0.16	0.20	0.18	2.20	2.01
21 or Older¹	64	67	0.03	0.03	0.06	0.06	0.14	0.15
12-25	89	85	0.15	0.14	0.19	0.17	1.09	1.08
12-17	47	34	0.18	0.13	0.19	0.14	3.50	3.38
12-13	14	12	0.18	0.15	0.19	0.15	*	*
14-15	31	21	0.33	0.23	0.35	0.24	*	5.96
16-17	35	26	0.39	0.28	0.42	0.30	4.62	4.47
18 or Older	82	86	0.03	0.03	0.07	0.07	0.17	0.19
18-25	73	75	0.22	0.21	0.32	0.31	1.06	1.09
18-20	53	52	0.42	0.41	0.53	0.51	2.52	2.37
21-25	57	54	0.25	0.23	0.40	0.37	1.11	1.11
26 or Older	29	38	0.01	0.02	0.03	0.04	0.07	0.10
SEX
Male	63	61	0.05	0.04	0.10	0.10	0.24	0.23
Female	65	65	0.05	0.04	0.09	0.08	0.30	0.32
SEX/AGE GROUP
Male 12-17	33	21	0.25	0.16	0.26	0.17	5.19	4.81
Female 12-17	33	28	0.26	0.22	0.27	0.24	4.77	4.84
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. ¹ The 12-20 and 21 or older rows are included because they are the underage and legal age groups for tobacco. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.2P – Past Year Initiation of Cigarette Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Cigarette Use, and among Past Year Cigarette Users Aged 12 or Older; by Demographic Characteristics, P Values from Tests of Differences of Percentages, 2024 Versus 2023
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	da		0.7514		0.6313		0.8483
AGE GROUP
12-20¹	da		0.6917		0.6614		0.9232
21 or Older¹	da		0.9870		0.8875		0.7680
12-25	da		0.5481		0.5065		0.9268
12-17	da		0.0594		0.0588		0.1050
12-13	da		0.5511		0.5467		*
14-15	da		0.4396		0.4187		*
16-17	da		0.1031		0.1133		0.1108
18 or Older	da		0.5447		0.6702		0.3038
18-25	da		0.7669		0.8726		0.4271
18-20	da		0.3650		0.4318		0.2330
21-25	da		0.6367		0.5813		0.9161
26 or Older	da		0.4930		0.5250		0.4241
SEX
Male	da		0.4118		0.2909		0.5467
Female	da		0.7524		0.7766		0.3699
SEX/AGE GROUP
Male 12-17	da		0.1196		0.1179		0.1104
Female 12-17	da		0.2586		0.2572		0.4770
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. ¹ The 12-20 and 21 or older rows are included because they are the underage and legal age groups for tobacco. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.3D – Past Year Initiation of Nicotine Vaping: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Nicotine Vaping, and among People Aged 12 or Older Who Vaped Nicotine in Past Year; by Demographic Characteristics, Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	228	226	0.08	0.08	0.10	0.10	0.56	0.53
AGE GROUP
12-20¹	113	100	0.28	0.25	0.35	0.32	1.23	1.22
21 or Older¹	211	211	0.08	0.08	0.11	0.11	0.64	0.59
12-25	119	110	0.20	0.18	0.29	0.27	0.74	0.70
12-17	81	71	0.31	0.27	0.36	0.31	1.65	1.75
12-13	35	26	0.43	0.32	0.45	0.33	4.12	4.98
14-15	54	45	0.57	0.49	0.65	0.56	2.79	3.21
16-17	51	49	0.56	0.53	0.71	0.69	2.31	2.21
18 or Older	217	214	0.08	0.08	0.11	0.11	0.59	0.55
18-25	86	83	0.25	0.24	0.46	0.44	0.72	0.70
18-20	64	64	0.50	0.50	0.79	0.79	1.46	1.58
21-25	61	52	0.27	0.23	0.53	0.46	0.75	0.64
26 or Older	201	198	0.09	0.09	0.11	0.11	0.82	0.73
SEX
Male	158	162	0.11	0.12	0.15	0.16	0.75	0.74
Female	174	162	0.12	0.11	0.15	0.14	0.87	0.78
SEX/AGE GROUP
Male 12-17	51	48	0.38	0.36	0.43	0.41	2.56	2.66
Female 12-17	60	50	0.48	0.39	0.56	0.46	2.27	2.23
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. ¹ The 12-20 and 21 or older rows are included because they are the underage and legal age groups for tobacco. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.3P – Past Year Initiation of Nicotine Vaping: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Nicotine Vaping, and among People Aged 12 or Older Who Vaped Nicotine in Past Year; by Demographic Characteristics, P Values from Tests of Differences of Percentages, 2024 Versus 2023
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	da		0.0351		0.0661		0.0057
AGE GROUP
12-20¹	da		0.0103		0.0131		0.0828
21 or Older¹	da		0.3248		0.4298		0.0889
12-25	da		0.0003		0.0006		0.0015
12-17	da		0.0033		0.0043		0.0032
12-13	da		0.0192		0.0234		0.0039
14-15	da		0.0306		0.0233		0.3094
16-17	da		0.3101		0.4104		0.1171
18 or Older	da		0.2694		0.3762		0.0877
18-25	da		0.0321		0.0397		0.0761
18-20	da		0.5569		0.5303		0.7944
21-25	da		0.0090		0.0132		0.0090
26 or Older	da		0.7384		0.8645		0.2615
SEX
Male	da		0.8261		0.9827		0.4938
Female	da		0.0078		0.0124		0.0023
SEX/AGE GROUP
Male 12-17	da		0.1365		0.1496		0.0522
Female 12-17	da		0.0060		0.0077		0.0168
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. ¹ The 12-20 and 21 or older rows are included because they are the underage and legal age groups for tobacco. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.4D – Past Year Initiation of Alcohol Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Alcohol Use, and among Past Year Alcohol Users Aged 12 or Older; by Demographic Characteristics, Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	165	164	0.06	0.06	0.26	0.26	0.09	0.09
AGE GROUP
12-20¹	143	131	0.33	0.32	0.45	0.42	1.05	1.02
21 or Older¹	88	96	0.04	0.04	0.25	0.27	0.05	0.06
12-25	147	146	0.25	0.24	0.44	0.42	0.51	0.52
12-17	91	84	0.35	0.32	0.41	0.38	1.65	1.62
12-13	29	29	0.36	0.35	0.38	0.37	5.10	5.41
14-15	54	47	0.57	0.51	0.65	0.58	2.92	3.07
16-17	68	68	0.73	0.70	0.96	0.95	2.06	1.96
18 or Older	128	131	0.05	0.05	0.31	0.31	0.07	0.08
18-25	116	116	0.34	0.33	1.00	0.93	0.49	0.49
18-20	94	90	0.70	0.68	1.29	1.24	1.27	1.30
21-25	79	81	0.34	0.35	1.51	1.43	0.44	0.46
26 or Older	38	52	0.02	0.02	0.13	0.17	0.03	0.03
SEX
Male	111	117	0.08	0.08	0.37	0.40	0.13	0.13
Female	105	104	0.07	0.07	0.31	0.30	0.12	0.12
SEX/AGE GROUP
Male 12-17	56	57	0.43	0.43	0.49	0.50	2.42	2.30
Female 12-17	65	58	0.51	0.46	0.61	0.55	2.07	2.13
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. ¹ The 12-20 and 21 or older rows are included because they are the underage and legal age groups for alcohol. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.4P – Past Year Initiation of Alcohol Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Alcohol Use, and among Past Year Alcohol Users Aged 12 or Older; by Demographic Characteristics, P Values from Tests of Differences of Percentages, 2024 Versus 2023
Demographic Characteristic	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Demographic Characteristic	2023	2024	2023	2024	2023	2024	2023	2024
TOTAL	da		0.7764		0.8571		0.9019
AGE GROUP
12-20¹	da		0.3151		0.3356		0.5642
21 or Older¹	da		0.3530		0.3193		0.3175
12-25	da		0.4412		0.4248		0.6104
12-17	da		0.1679		0.1880		0.2679
12-13	da		0.7745		0.7399		0.6492
14-15	da		0.0390		0.0347		0.4032
16-17	da		0.8592		0.8683		0.6020
18 or Older	da		0.4884		0.4821		0.4168
18-25	da		0.9493		0.7166		0.7420
18-20	da		0.9170		0.7624		0.7384
21-25	da		0.8645		0.8215		0.7930
26 or Older	da		0.1249		0.1171		0.1209
SEX
Male	da		0.8892		0.6600		0.6942
Female	da		0.5507		0.4632		0.5361
SEX/AGE GROUP
Male 12-17	da		0.4222		0.4774		0.3786
Female 12-17	da		0.2306		0.2241		0.4612
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. ¹ The 12-20 and 21 or older rows are included because they are the underage and legal age groups for alcohol. Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.5D – Past Year Initiation of Substance Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 12 or Older; Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr	nr	nr
Marijuana	162	155	0.06	0.05	0.11	0.10	0.26	0.24
Cocaine	63	58	0.02	0.02	0.03	0.02	1.19	1.34
Crack	27	23	0.01	0.01	0.01	0.01	2.68	3.14
Heroin	11	10	<0.01	<0.01	<0.01	<0.01	1.65	1.86
Hallucinogens	95	126	0.03	0.04	0.04	0.05	1.05	1.15
LSD	47	40	0.02	0.01	0.02	0.02	2.57	2.51
PCP	17	20	0.01	0.01	0.01	0.01	*	*
Ecstasy	68	51	0.02	0.02	0.03	0.02	2.71	2.30
Inhalants	--	68	--	0.02	--	0.03	--	1.95
Methamphetamine	23	29	0.01	0.01	0.01	0.01	0.89	1.23
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr	nr	nr
Pain Relievers	122	128	0.04	0.04	nr	nr	1.31	1.46
Stimulants	77	70	0.03	0.02	nr	nr	1.78	1.64
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr	nr	nr
Tranquilizers	67	83	0.02	0.03	nr	nr	1.63	2.02
Sedatives	65	50	0.02	0.02	nr	nr	5.58	5.09
Benzodiazepines	--	--	--	--	--	--	--	--
Opioids	--	--	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana¹	nr	nr	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	nr	nr	nr	nr	nr	nr	nr	nr
Cigarettes	95	93	0.03	0.03	0.07	0.07	0.20	0.20
Daily Cigarettes	56	40	0.02	0.01	0.03	0.02	--	--
Smokeless Tobacco	94	85	0.03	0.03	0.04	0.03	0.98	0.87
Cigars	153	106	0.05	0.04	0.08	0.05	0.74	0.57
Nicotine Vaping	228	226	0.08	0.08	0.10	0.10	0.56	0.53
ALCOHOL	165	164	0.06	0.06	0.26	0.26	0.09	0.09
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.5P – Past Year Initiation of Substance Use: Among People Aged 12 or Older, among People Aged 12 or Older at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 12 or Older; P Values from Tests of Differences of Percentages, 2024 Versus 2023
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	da		nr		nr		nr
Marijuana	da		0.0084		0.0137		0.0033
Cocaine	da		0.5473		0.5408		0.7175
Crack	da		0.6313		0.6343		0.9080
Heroin	da		0.9043		0.9032		0.6297
Hallucinogens	da		0.5468		0.4892		0.3330
LSD	da		0.1823		0.1842		0.3137
PCP	da		0.5608		0.5613		*
Ecstasy	da		0.1023		0.1010		0.1851
Inhalants	da		--		--		--
Methamphetamine	da		0.5231		0.5297		0.3623
Misuse of Prescription Psychotherapeutics	da		nr		nr		nr
Pain Relievers	da		0.5162		nr		0.1532
Stimulants	da		0.3055		nr		0.3241
Tranquilizers or Sedatives	da		nr		nr		nr
Tranquilizers	da		0.1229		nr		0.0512
Sedatives	da		0.5409		nr		0.8537
Benzodiazepines	da		--		--		--
Opioids	da		--		--		--
Illicit Drugs Other Than Marijuana¹	da		nr		nr		nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	da		nr		nr		nr
Cigarettes	da		0.7514		0.6313		0.8483
Daily Cigarettes	da		0.1890		0.1763		--
Smokeless Tobacco	da		0.1517		0.1599		0.0767
Cigars	da		0.0189		0.0141		0.1262
Nicotine Vaping	da		0.0351		0.0661		0.0057
ALCOHOL	da		0.7764		0.8571		0.9019
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.6D – Past Year Initiation of Substance Use: Among People Aged 12 to 17, among People Aged 12 to 17 at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 12 to 17; Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 to 17		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr	nr	nr
Marijuana	73	66	0.28	0.26	0.31	0.28	1.87	1.93
Cocaine	7	10	0.03	0.04	0.03	0.04	*	*
Crack	4	4	0.02	0.02	0.02	0.02	*	*
Heroin	4	6	0.02	0.02	0.02	0.02	*	*
Hallucinogens	32	33	0.12	0.13	0.12	0.13	4.63	5.10
LSD	20	22	0.08	0.08	0.08	0.08	*	*
PCP	6	1	0.02	<0.01	0.02	<0.01	*	*
Ecstasy	15	8	0.06	0.03	0.06	0.03	*	*
Inhalants	--	35	--	0.13	--	0.15	--	3.02
Methamphetamine	9	5	0.03	0.02	0.03	0.02	*	*
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr	nr	nr
Pain Relievers	26	26	0.10	0.10	nr	nr	4.30	4.58
Stimulants	19	14	0.07	0.05	nr	nr	*	*
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr	nr	nr
Tranquilizers	11	15	0.04	0.06	nr	nr	*	*
Sedatives	16	6	0.06	0.02	nr	nr	*	*
Benzodiazepines	--	--	--	--	--	--	--	--
Opioids	--	--	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana¹	nr	nr	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	nr	nr	nr	nr	nr	nr	nr	nr
Cigarettes	47	34	0.18	0.13	0.19	0.14	3.50	3.38
Daily Cigarettes	7	10	0.03	0.04	0.03	0.04	--	--
Smokeless Tobacco	20	28	0.08	0.11	0.08	0.11	*	5.89
Cigars	36	30	0.14	0.12	0.14	0.12	5.08	5.09
Nicotine Vaping	81	71	0.31	0.27	0.36	0.31	1.65	1.75
ALCOHOL	91	84	0.35	0.32	0.41	0.38	1.65	1.62
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.6P – Past Year Initiation of Substance Use: Among People Aged 12 to 17, among People Aged 12 to 17 at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 12 to 17; P Values from Tests of Differences of Percentages, 2024 Versus 2023
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 12 to 17		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	da		nr		nr		nr
Marijuana	da		0.0084		0.0103		0.0146
Cocaine	da		0.3755		0.3747		*
Crack	da		0.7174		0.7170		*
Heroin	da		0.4344		0.4344		*
Hallucinogens	da		0.8105		0.8246		0.4293
LSD	da		0.6422		0.6409		*
PCP	da		0.2018		0.2018		*
Ecstasy	da		0.0388		0.0390		*
Inhalants	da		--		--		--
Methamphetamine	da		0.9746		0.9748		*
Misuse of Prescription Psychotherapeutics	da		nr		nr		nr
Pain Relievers	da		0.1197		nr		0.9195
Stimulants	da		0.1897		nr		*
Tranquilizers or Sedatives	da		nr		nr		nr
Tranquilizers	da		0.4431		nr		*
Sedatives	da		0.0993		nr		*
Benzodiazepines	da		--		--		--
Opioids	da		--		--		--
Illicit Drugs Other Than Marijuana¹	da		nr		nr		nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	da		nr		nr		nr
Cigarettes	da		0.0594		0.0588		0.1050
Daily Cigarettes	da		0.2901		0.2885		--
Smokeless Tobacco	da		0.0837		0.0837		*
Cigars	da		0.6574		0.6588		0.0753
Nicotine Vaping	da		0.0033		0.0043		0.0032
ALCOHOL	da		0.1679		0.1880		0.2679
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.7D – Past Year Initiation of Substance Use: Among People Aged 18 or Older, among People Aged 18 or Older at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 18 or Older; Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 18 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr	nr	nr
Marijuana	144	138	0.06	0.05	0.11	0.11	0.24	0.22
Cocaine	62	58	0.02	0.02	0.03	0.03	1.20	1.33
Crack	27	23	0.01	0.01	0.01	0.01	2.66	3.10
Heroin	10	8	<0.01	<0.01	<0.01	<0.01	1.54	1.50
Hallucinogens	92	123	0.04	0.05	0.04	0.06	1.06	1.17
LSD	43	36	0.02	0.01	0.02	0.02	2.55	2.38
PCP	16	20	0.01	0.01	0.01	0.01	*	*
Ecstasy	66	51	0.03	0.02	0.03	0.02	2.72	2.35
Inhalants	--	59	--	0.02	--	0.03	--	2.53
Methamphetamine	22	29	0.01	0.01	0.01	0.01	0.83	1.23
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr	nr	nr
Pain Relievers	121	126	0.05	0.05	nr	nr	1.39	1.53
Stimulants	76	68	0.03	0.03	nr	nr	1.85	1.70
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr	nr	nr
Tranquilizers	66	82	0.03	0.03	nr	nr	1.65	2.07
Sedatives	63	50	0.02	0.02	nr	nr	*	5.43
Benzodiazepines	--	--	--	--	--	--	--	--
Opioids	--	--	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana¹	nr	nr	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	nr	nr	nr	nr	nr	nr	nr	nr
Cigarettes	82	86	0.03	0.03	0.07	0.07	0.17	0.19
Daily Cigarettes	55	39	0.02	0.01	0.03	0.02	--	--
Smokeless Tobacco	92	80	0.04	0.03	0.04	0.04	0.98	0.84
Cigars	148	102	0.06	0.04	0.08	0.06	0.73	0.56
Nicotine Vaping	217	214	0.08	0.08	0.11	0.11	0.59	0.55
ALCOHOL	128	131	0.05	0.05	0.31	0.31	0.07	0.08
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.7P – Past Year Initiation of Substance Use: Among People Aged 18 or Older, among People Aged 18 or Older at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 18 or Older; P Values from Tests of Differences of Percentages, 2024 Versus 2023
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 18 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	da		nr		nr		nr
Marijuana	da		0.1265		0.1607		0.0707
Cocaine	da		0.4660		0.4589		0.8364
Crack	da		0.5840		0.5869		0.9789
Heroin	da		0.7697		0.7707		0.9565
Hallucinogens	da		0.4898		0.4410		0.4966
LSD	da		0.2310		0.2327		0.3118
PCP	da		0.3709		0.3713		*
Ecstasy	da		0.2109		0.2079		0.3343
Inhalants	da		--		--		--
Methamphetamine	da		0.4993		0.5055		0.3501
Misuse of Prescription Psychotherapeutics	da		nr		nr		nr
Pain Relievers	da		0.3299		nr		0.1087
Stimulants	da		0.4591		nr		0.4749
Tranquilizers or Sedatives	da		nr		nr		nr
Tranquilizers	da		0.1561		nr		0.0674
Sedatives	da		0.7803		nr		*
Benzodiazepines	da		--		--		--
Opioids	da		--		--		--
Illicit Drugs Other Than Marijuana¹	da		nr		nr		nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	da		nr		nr		nr
Cigarettes	da		0.5447		0.6702		0.3038
Daily Cigarettes	da		0.1252		0.1149		--
Smokeless Tobacco	da		0.3067		0.3212		0.1640
Cigars	da		0.0203		0.0147		0.1260
Nicotine Vaping	da		0.2694		0.3762		0.0877
ALCOHOL	da		0.4884		0.4821		0.4168
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.8D – Past Year Initiation of Substance Use: Among People Aged 18 to 25, among People Aged 18 to 25 at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 18 to 25; Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 18 to 25		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr	nr	nr
Marijuana	80	72	0.23	0.21	0.43	0.38	0.61	0.56
Cocaine	36	42	0.11	0.12	0.11	0.13	2.91	3.96
Crack	17	3	0.05	0.01	0.05	0.01	*	*
Heroin	4	8	0.01	0.02	0.01	0.02	*	*
Hallucinogens	54	58	0.16	0.16	0.19	0.19	1.95	2.20
LSD	26	26	0.08	0.07	0.08	0.08	4.33	5.75
PCP	*	3	*	0.01	*	0.01	*	*
Ecstasy	47	33	0.14	0.10	0.15	0.10	6.02	6.31
Inhalants	--	43	--	0.12	--	0.14	--	4.62
Methamphetamine	5	13	0.01	0.04	0.01	0.04	4.39	*
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr	nr	nr
Pain Relievers	28	42	0.08	0.12	nr	nr	3.06	3.73
Stimulants	44	36	0.13	0.10	nr	nr	3.42	3.21
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr	nr	nr
Tranquilizers	23	23	0.07	0.07	nr	nr	3.83	4.18
Sedatives	8	10	0.02	0.03	nr	nr	*	*
Benzodiazepines	--	--	--	--	--	--	--	--
Opioids	--	--	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana¹	nr	nr	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	nr	nr	nr	nr	nr	nr	nr	nr
Cigarettes	73	75	0.22	0.21	0.32	0.31	1.06	1.09
Daily Cigarettes	31	35	0.09	0.10	0.10	0.11	--	--
Smokeless Tobacco	66	52	0.19	0.15	0.21	0.16	3.39	2.12
Cigars	79	69	0.23	0.20	0.29	0.24	1.67	1.63
Nicotine Vaping	86	83	0.25	0.24	0.46	0.44	0.72	0.70
ALCOHOL	116	116	0.34	0.33	1.00	0.93	0.49	0.49
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.8P – Past Year Initiation of Substance Use: Among People Aged 18 to 25, among People Aged 18 to 25 at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 18 to 25; P Values from Tests of Differences of Percentages, 2024 Versus 2023
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 18 to 25		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	da		nr		nr		nr
Marijuana	da		0.0735		0.0559		0.1551
Cocaine	da		0.9113		0.9771		0.0768
Crack	da		0.1596		0.1592		*
Heroin	da		0.1305		0.1310		*
Hallucinogens	da		0.3832		0.4329		0.2612
LSD	da		0.4228		0.4085		0.6628
PCP	da		*		*		*
Ecstasy	da		0.0969		0.0934		0.3044
Inhalants	da		--		--		--
Methamphetamine	da		0.4877		0.4902		*
Misuse of Prescription Psychotherapeutics	da		nr		nr		nr
Pain Relievers	da		0.3788		nr		0.6027
Stimulants	da		0.4890		nr		0.8532
Tranquilizers or Sedatives	da		nr		nr		nr
Tranquilizers	da		0.6102		nr		0.6636
Sedatives	da		0.4401		nr		*
Benzodiazepines	da		--		--		--
Opioids	da		--		--		--
Illicit Drugs Other Than Marijuana¹	da		nr		nr		nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	da		nr		nr		nr
Cigarettes	da		0.7669		0.8726		0.4271
Daily Cigarettes	da		0.3704		0.3475		--
Smokeless Tobacco	da		0.8453		0.8386		0.2940
Cigars	da		0.0343		0.0222		0.0890
Nicotine Vaping	da		0.0321		0.0397		0.0761
ALCOHOL	da		0.9493		0.7166		0.7420
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

250514

Table 4.9D – Past Year Initiation of Substance Use: Among People Aged 26 or Older, among People Aged 26 or Older at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 26 or Older; Standard Errors of Numbers in Thousands and Standard Errors of Percentages, 2023 and 2024
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 26 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr	nr	nr
Marijuana	127	113	0.06	0.05	0.11	0.10	0.27	0.23
Cocaine	51	38	0.02	0.02	0.03	0.02	1.27	1.11
Crack	21	23	0.01	0.01	0.01	0.01	2.17	3.25
Heroin	9	*	<0.01	*	<0.01	*	1.49	*
Hallucinogens	75	107	0.03	0.05	0.04	0.06	1.22	1.33
LSD	35	26	0.02	0.01	0.02	0.01	3.07	2.28
PCP	16	19	0.01	0.01	0.01	0.01	*	*
Ecstasy	47	38	0.02	0.02	0.02	0.02	2.76	2.32
Inhalants	--	40	--	0.02	--	0.02	--	2.53
Methamphetamine	21	26	0.01	0.01	0.01	0.01	0.85	1.19
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr	nr	nr
Pain Relievers	119	121	0.05	0.05	nr	nr	1.52	1.70
Stimulants	59	59	0.03	0.03	nr	nr	2.09	2.00
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr	nr	nr
Tranquilizers	63	78	0.03	0.03	nr	nr	1.82	2.30
Sedatives	63	49	0.03	0.02	nr	nr	*	5.87
Benzodiazepines	--	--	--	--	--	--	--	--
Opioids	--	--	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana¹	nr	nr	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	nr	nr	nr	nr	nr	nr	nr	nr
Cigarettes	29	38	0.01	0.02	0.03	0.04	0.07	0.10
Daily Cigarettes	43	16	0.02	0.01	0.03	0.01	--	--
Smokeless Tobacco	64	56	0.03	0.02	0.03	0.03	0.82	0.79
Cigars	126	69	0.06	0.03	0.09	0.05	0.79	0.49
Nicotine Vaping	201	198	0.09	0.09	0.11	0.11	0.82	0.73
ALCOHOL	38	52	0.02	0.02	0.13	0.17	0.03	0.03
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.9P – Past Year Initiation of Substance Use: Among People Aged 26 or Older, among People Aged 26 or Older at Risk for Initiation of Substance Use, and among Past Year Substance Users Aged 26 or Older; P Values from Tests of Differences of Percentages, 2024 Versus 2023
Substance	Number of Past Year Initiates (1,000s)		Percentage of Past Year Initiates among People Aged 26 or Older		Percentage of Past Year Initiates among People at Risk for Initiation		Percentage of Past Year Initiates among Past Year Users
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	da		nr		nr		nr
Marijuana	da		0.5204		0.5858		0.3635
Cocaine	da		0.2758		0.2757		0.4712
Crack	da		0.8502		0.8466		0.5312
Heroin	da		*		*		*
Hallucinogens	da		0.1871		0.1714		0.8311
LSD	da		0.3428		0.3462		0.2544
PCP	da		0.4744		0.4749		*
Ecstasy	da		0.8497		0.8458		0.8990
Inhalants	da		--		--		--
Methamphetamine	da		0.6566		0.6627		0.4819
Misuse of Prescription Psychotherapeutics	da		nr		nr		nr
Pain Relievers	da		0.4581		nr		0.1563
Stimulants	da		0.6699		nr		0.5824
Tranquilizers or Sedatives	da		nr		nr		nr
Tranquilizers	da		0.1051		nr		0.0443
Sedatives	da		0.8703		nr		*
Benzodiazepines	da		--		--		--
Opioids	da		--		--		--
Illicit Drugs Other Than Marijuana¹	da		nr		nr		nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	da		nr		nr		nr
Cigarettes	da		0.4930		0.5250		0.4241
Daily Cigarettes	da		0.1759		0.1719		--
Smokeless Tobacco	da		0.2267		0.2346		0.0993
Cigars	da		0.1470		0.1334		0.2881
Nicotine Vaping	da		0.7384		0.8645		0.2615
ALCOHOL	da		0.1249		0.1171		0.1209
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.10C – Past Year Initiation of Substance Use: Among People Aged 12 or Older Who Initiated Use Prior to Age 18, Prior to Age 21, and at Age 21 or Older; Standard Errors of Numbers in Thousands, 2023 and 2024
Substance	People Who Initiated Use Prior to Age 18		People Who Initiated Use Prior to Age 21¹		People Who Initiated Use at Age 21 or Older¹
Substance	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr
Marijuana	83	70	102	87	133	127
Cocaine	7	10	26	25	57	52
Crack	4	4	18	5	21	23
Heroin	*	6	5	7	10	6
Hallucinogens	34	34	53	52	84	116
LSD	21	22	24	26	41	32
PCP	6	1	6	2	16	20
Ecstasy	18	8	33	18	57	48
Inhalants	--	38	--	45	--	51
Methamphetamine	9	5	10	5	21	29
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr
Pain Relievers	27	28	30	40	122	123
Stimulants	19	*	30	30	73	63
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr
Tranquilizers	*	*	16	*	66	79
Sedatives	*	*	*	*	63	49
Benzodiazepines	--	--	--	--	--	--
Opioids	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana²	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING³	nr	nr	nr	nr	nr	nr
Cigarettes	52	38	78	70	57	62
Daily Cigarettes	10	10	23	22	49	28
Smokeless Tobacco	27	29	50	49	74	73
Cigars	41	34	69	57	134	95
Nicotine Vaping	90	81	112	101	211	210
ALCOHOL	102	90	148	134	85	90
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ The prior to 21 and 21 or older columns are included because they are the underage and legal age groups for tobacco and alcohol. ² Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ³ Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.11D – Past Year Initiation of Substance Use: Among People Aged 12 to 49; Mean Age at First Substance Use: Among Past Year Initiates Aged 12 to 49; by Sex, Standard Errors of Numbers in Thousands and Standard Errors of Averages, 2023 and 2024
Substance	Number of Past Year Initiates (1,000s)		Mean Age among Past Year Initiates		Mean Age among Past Year Male Initiates		Mean Age among Past Year Female Initiates
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	nr	nr	nr	nr	nr	nr	nr	nr
Marijuana	127	128	0.39	0.51	0.49	0.51	0.60	0.82
Cocaine	61	56	0.93	0.61	1.56	0.91	1.12	0.59
Crack	24	23	4.06	3.38	*	*	5.95	7.29
Heroin	11	10	4.31	1.26	*	*	*	1.46
Hallucinogens	92	107	0.66	0.72	0.93	1.10	0.98	0.92
LSD	47	39	1.08	1.33	1.12	2.13	1.72	1.66
PCP	17	11	*	*	*	*	*	*
Ecstasy	63	49	1.26	1.23	0.93	1.67	2.49	2.06
Inhalants	--	67	--	0.85	--	1.02	--	1.29
Methamphetamine	17	29	2.06	3.29	3.48	4.13	2.43	4.29
Misuse of Prescription Psychotherapeutics	nr	nr	nr	nr	nr	nr	nr	nr
Pain Relievers	82	92	1.06	1.13	1.66	1.81	1.19	1.32
Stimulants	70	67	0.80	1.43	1.18	2.20	1.12	1.77
Tranquilizers or Sedatives	nr	nr	nr	nr	nr	nr	nr	nr
Tranquilizers	54	57	1.40	1.37	3.00	1.94	1.29	1.39
Sedatives	33	31	2.05	2.06	2.39	2.56	3.42	2.96
Benzodiazepines	--	--	--	--	--	--	--	--
Opioids	--	--	--	--	--	--	--	--
Illicit Drugs Other Than Marijuana¹	nr	nr	nr	nr	nr	nr	nr	nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	nr	nr	nr	nr	nr	nr	nr	nr
Cigarettes	94	90	0.30	0.52	0.41	0.25	0.43	0.99
Daily Cigarettes	45	40	0.85	0.88	1.16	1.16	0.94	1.23
Smokeless Tobacco	86	84	1.01	0.64	1.31	0.73	1.37	1.16
Cigars	112	98	0.54	0.55	0.70	0.55	0.80	1.08
Nicotine Vaping	187	175	0.40	0.47	0.58	0.71	0.53	0.63
ALCOHOL	161	164	0.15	0.21	0.23	0.31	0.19	0.29
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.

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Table 4.11P – Past Year Initiation of Substance Use: Among People Aged 12 to 49; Mean Age at First Substance Use: Among Past Year Initiates Aged 12 to 49; by Sex, P Values from Tests of Differences of Averages, 2024 Versus 2023
Substance	Number of Past Year Initiates (1,000s)		Mean Age among Past Year Initiates		Mean Age among Past Year Male Initiates		Mean Age among Past Year Female Initiates
Substance	2023	2024	2023	2024	2023	2024	2023	2024
ILLICIT DRUGS	da		nr		nr		nr
Marijuana	da		0.2663		0.2975		0.5161
Cocaine	da		0.0448		0.6323		0.0036
Crack	da		0.5300		*		0.9746
Heroin	da		0.0312		*		*
Hallucinogens	da		0.3726		0.5156		0.5624
LSD	da		0.8637		0.7138		0.8061
PCP	da		*		*		*
Ecstasy	da		0.1753		0.0677		0.7058
Inhalants	da		--		--		--
Methamphetamine	da		0.1274		0.0954		0.5337
Misuse of Prescription Psychotherapeutics	da		nr		nr		nr
Pain Relievers	da		0.3791		0.6635		0.2962
Stimulants	da		0.1785		0.3144		0.3661
Tranquilizers or Sedatives	da		nr		nr		nr
Tranquilizers	da		0.9196		0.5258		0.0829
Sedatives	da		0.0504		0.0949		0.0800
Benzodiazepines	da		--		--		--
Opioids	da		--		--		--
Illicit Drugs Other Than Marijuana¹	da		nr		nr		nr
TOBACCO PRODUCT USE OR NICOTINE VAPING²	da		nr		nr		nr
Cigarettes	da		0.4650		0.5577		0.2926
Daily Cigarettes	da		0.8264		0.7020		0.8896
Smokeless Tobacco	da		0.5728		0.5468		0.9822
Cigars	da		0.4822		0.7597		0.3120
Nicotine Vaping	da		0.2980		0.0719		0.9275
ALCOHOL	da		0.0189		0.1515		0.0583
* = low precision; -- = not available or not comparable due to methodological or questionnaire changes; da = does not apply; nr = not reported due to measurement issues. NOTE: Methodological limitations preclude the estimation of past year initiates for aggregate substance use categories having at least one prescription psychotherapeutic, including categories for overall illicit drugs, misuse of prescription psychotherapeutics, tranquilizers or sedatives, opioids, and illicit drugs other than marijuana (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). NOTE: Changes were made to the inhalant questions in 2024. See Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions for details. ¹ Illicit drugs other than marijuana excludes respondents who used only marijuana but includes those who used marijuana in addition to other illicit drugs. ² Because respondents were not asked initiation questions for pipe tobacco, initiation of the aggregate tobacco products or nicotine vaping measure cannot be determined (see Chapter 3 of the 2024 National Survey on Drug Use and Health (NSDUH): Methodological Summary and Definitions). Definitions: Measures and terms are defined in Appendix A. Source: SAMHSA, Center for Behavioral Health Statistics and Quality, National Survey on Drug Use and Health, 2023 and 2024.