Which of the following drugs of abuse is not routinely screened for in
urinalysis?
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Methadone
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LSD
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Amphetamine
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Cannabis
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Cocaine
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Drug (screening)
Note that detection times vary considerably from person to person. That being said the following table serves as a rough guide. As a general rule most substances remain positive in the urine for 1-3 days with the exception of heavy users of cannabis who can remain positive for up to 14-28 days.
(Adapted from Synopsis of Psychiatry, Kaplan & Sadock's)
Standard drugs included in a urinalysis screen include:-
| Drug of abuse | Length of time detectable in urine |
|---|---|
| Cannabis (heavy use) | 14-28 days |
| Cannabis (single use) | 3 days |
| Phencyclidine | 8 days |
| Methadone | 3 days |
| Morphine | 3 days |
| Benzodiazepine | 3 days |
| Heroin | 3 days |
| Cocaine | 1-3 days |
| Amphetamine | 1-3 days |
| LSD | 1-3 days |
| Codeine | 2 days |
| Alcohol | 12 hours |
(Adapted from Synopsis of Psychiatry, Kaplan & Sadock's)
Standard drugs included in a urinalysis screen include:-
- Cannabis
- Amphetamine
- Cocaine
- Methadone
- Benzodiazepines
- Opiates
