The analysis revealed that 79 percent required psychiatric consultation. Those requiring consultation had higher rates of drug-positive urine tests than did those who did not require psychiatric consultation. They were also more likely to have progressed to AIDS and less likely to have AZT prescribed. Findings indicated that mental disorders are common among injection drug users in methadone maintenance treatment and that these disorders may be associated with worsened outcomes for drug treatment and HIV disease. Tables, figures, and 32 references (Author abstract modified)