This paper describes the time course of withdrawal and relapse in opioid-de
pendent volunteers (n = 8) who completed a gradual outpatient buprenorphine
dose taper (28 days). Compliance with treatment was very high, as evidence
d by clinic attendance (96-100%). Urinalysis showed that 6 of the 8 volunte
ers had relapsed to opiates by the end of the dose taper, even though repor
ts of withdrawal were generally low. Relapse may have been triggered by a d
esire to re-experience the drug's positive subjective effects, craving, or
low motivation to remain drug-free. A longer taper combined with an expande
d range of treatments may improve prognosis.