Table 5.4b Heroin admissions by route of administration and planned use of methadone: TEDS 1992-2000 Percent distribution
Route of heroin administration and planned use of methadone	1992	1993	1994	1995	1996	1997	1998	1999	2000
Route of administration
Injection	77.0	74.2	73.2	69.6	69.4	67.5	66.2	66.5	64.6
Inhalation	19.6	22.5	23.3	26.7	26.5	28.0	28.9	28.1	29.9
Smoking	1.4	1.7	1.9	2.2	2.4	2.7	2.7	3.1	3.0
Oral	1.3	1.1	1.1	1.1	1.1	1.1	1.3	1.3	1.6
Other	0.7	0.6	0.5	0.5	0.6	0.7	0.8	1.0	0.8
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Methadone use planned as part of treatment, by route of administration
Injection	62.1	60.9	61.2	55.3	51.4	46.9	46.6	45.8	44.5
Inhalation	46.9	45.0	43.5	30.5	24.2	25.2	35.9	33.5	33.6
Smoking	44.0	47.0	51.7	50.8	50.8	50.7	49.7	50.7	47.4
Oral	18.0	19.1	22.7	18.0	7.3	18.8	19.7	18.5	18.3
Other	48.5	42.6	46.1	40.4	40.3	39.1	37.2	37.8	29.7
Total	58.2	56.5	56.4	48.1	43.6	40.6	43.2	42.1	40.8
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS) - 4.1.02.