The Marijuana Drug Test detection time-urinalysis
| Light smoker or acute dosage | 1-3 days |
| Moderate use (4x / week) | 3-5 days |
| Heavy smoker (daily) | 10 days |
| Heavy, chronic use (5+ joints/day) | 10-21+ days |
| Oral ingestion | 1-5 days |
Passive inhalation of marijuana. In general, routine passive exposure to marijuana smoke will not result in a positive result for carboxy-THC.
Only under unrealistic conditions, a person may test positive for carboxy-THC, but concentrations are generally below the routine cut off levels.
THC - Substances or Conditions which can cause false positives
- Dronabinol (Marinol)
- Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB etc)
- Ketoprofen (Orudis KT)
- Kidney infection (Kidney disease, diabetes) Liver Disease
- Naproxen (Aleve)
- Promethazine (Phenergan, Promethegan)
- Riboflavin (B2, Hempseed Oil)
