An open clinical trial was conducted to compare the effects of rapid (
1-day) admission with slow (14-day) admission to methadone maintenance
on pretreatment attrition, retention during treatment, and other outc
omes. One hundred eighty-six illicit opioid users eligible for methado
ne maintenance were randomly assigned to rapid admission or slow admis
sion, with 93 subjects assigned to each group. The random assignment p
roduced two groups that were similar on 22 personal variables. All sub
jects admitted to treatment were followed for 1 year. Follow-up interv
iews were obtained with 155 (98%) of the 158 subjects admitted to trea
tment. During the period from initial contact to medication, only 4% o
f the rapid admission subjects but 26% of the slow admission subjects
dropped out. The risk of dropout during slow admission was 6 times tha
t during rapid admission. A higher percentage of rapid admission subje
cts, 43%, than of slow admission subjects, 39%, remained continuously
in treatment for 1 year, but the difference was not significant. The t
wo subgroups that remained in treatment for 1 year did about equally w
ell on measures of illicit drug use and social performance. The findin
gs indicate that pretreatment attrition can be markedly reduced by pro
mpt medication, and that prompt medication does not adversely affect r
etention during treatment or other outcomes.