Marijuana (THC)
(times are only approximations)

• Infrequent smoker Days-1 week
• Moderate smoker Days-Weeks
• Chronic smoker Several Weeks

Opiates 2-3 days
(Codeine, Morphine, Hydrocodone,
Hydromorphone, Oxycodone, Heroin)

Phencyclidine 1-7 days
(PCP, Angel Dust)
(Chronic use may be up to 30 days)

Benzodiazepines Up to 2 weeks
(Such as Diazepam, Oxazepam,
Chlordiazepoxide, Alprazolam, Chlorazepate and others)

Barbiturates

• Short Acting (such as pentobarbital) 1 day
• Intermediate Acting (such as butalbital) 2-3 days
• Long Acting (such as phenobarbital) Several Weeks

Methadone 1 week
Tricyclic Antidepressants (TCAs) 2 weeks
(Amitriptyline, Nortriptyline, Imipramine, Desipramine)

Times presented are only a general guideline.