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Drug Detection Periods are expressed in terms of lower and upper boundaries. Many factors can determine an individual’s placement within these boundaries. In general, the following factors will increase a drug’s detection period: chronic use, high levels of use, high potency, slow body metabolism, high body fat count (Marijuana and PCP), low fluid intake, and overall poor health.

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Drug / Drug Type	Detection Periods
Alcohol	6 hours to 1 day
Amphetamine	1 to 4 days
Barbiturates	Short-acting (Allobarbital, Alphenal, Amobarbital, Aprobarbital, Butabarbital, Butalbital, Butethal, Pentobarbital, Secobarbital):  1 to 4 days
	Long-acting (Barbital, Phenobarbital): 2 to 3 weeks
Benzodiazepines	Short-term Therapeuttic Use: 3 days
	Long-term Chronic Use: 4 to 6 weeks
Cocaine	2 to 5 days
LSD	1 to 4 days
Marijuana (THC)	Casual Use: up to 7 days
	Chronic Use: up to 30 days or longer
	Note: THC is stored by the body in fatty lipid tissue, where it is slowly released into the bloodstream for up to several weeks. Chronic users and individuals with high body fat count are at the greatest risk of long-term detection.
MDMA (Ecstasy)	1 to 4 days
Mescaline	1 to 4 days
Methadone	1 to 7 days
Methamphetamine	1 to 4 days
Methaqualone	up to 14 days
Nicotene	1 to 2 days
Opiates	1 to 4 days
PCP	Casual Use: up to 7 days
	Chronic Use: up to 30 days
	Note: PCP is stored by the body in fatty lipid tissue, where it is slowly released into the bloodstream for up to several weeks. Chronic users and individuals with high body fat count are at the greatest risk of long-term detection.
Propoxyphene	1 to 7 days
Psilocybin (Mushrooms)	1 to 3 days
Steroids (Anabolic)	Oral: 2 to 3 weeks
	Injected: 1 to 3 months
	Naldrolene: up to 9 months
Tricyclic Antidepressants	1 to 9 days