Cognitive-motor performance of methadone-maintained patients.

Fifty-four methadone-maintained patients and 54 healthy controls, matched for age, gender and educational attainment, completed a battery of six cognitive-psychomotor performance tests. Results of previous studies were replicated in four areas. An attention task was performed less well by patients [mean difference more than 0.

The efficacy of L-methadone and racemic methadone in substitution treatment for opiate addicts--a double-blind comparison.

In a two-week double-blind trial l-methadone and racemic methadone were compared for efficacy in substitution treatment for opiate addicts. Before the trial the twenty-six participants had been on stable doses of l-methadone. Patients with evidence of current serious psychological problems were excluded.