Click on these topics for detailed information on each substance listed. Then Take the drug facts quiz and see what you retained.

How long are substances detectable for drug testing purposes?

Alcohol – 1 oz. for 1.5 hours

Amphetamines – 48 hours

Barbiturates – 2-10 days

Benzodiazepines – 2-3 weeks

Cocaine – 2-10 days

Heroin Metabolite – less than 1 day

Morphine – 2-3 days

LSD – 8 hours

Marijuana – casual use, 3-4 days; chronic use, several weeks up to 30 days

Methamphetamine – 2-3 days

Methadone – 2-3 days

Phencyclidine (PCP) – 1 week