SmartReader
Drug Ingestion/Detection times (Urine)

There are two time periods that are significant when it comes to the detection of drugs; how long after a drug is taken is it first detectable (ingestion) and how long the drug is detectable in urine (detection).

Drug

How soon after taking drug will there be a positive drug test?

How long after taking drug will there continue to be a positive drug test?

Marijuana/Pot

1 - 3 hours

1 - 7 days

Crack (Cocaine)

2 - 6 hours

2 - 3 days

Heroin (Opiates)

2 - 6 hours

1 - 3 days

Speed/Uppers

(Amphetamine,

methamphetamine)

4 - 6 hours

2 - 3 days

Angel Dust/PCP

4 - 6 hours

7 - 14 days

Ecstasy

2 - 7 hours

2 - 4 days

Benzodiazepine

2 - 7 hours

1 - 4 days

Barbiturates

2 - 4 hours

1 - 3 weeks

Methadone

3 - 8 hours

1 - 3 days

Tricyclic Antidepressants

8 - 12 hours

2 - 7 days

Oxycodone

1 - 3 hours

1 - 2 days

*Times can vary significantly from these estimates based on how long the person has been taking the drug, the amount of drug they use, or the person's metabolism.