4. Subjects with positive screening urine test for drugs of abuse, including opiates, amphetamines, barbiturates, methadone, oxycodone, benzodiazepines, cocaine, phencyclidine, methamphetamine, ecstasy, or cannabinoids; or with a history of use of cocaine, heroin, recreational drugs (e.g., MDMA/"ecstasy"), methamphetamine, or hallucinogens at any time during the past 3 months; or use of marijuana on a weekly basis for the past 3 months.