![]() Saliva testing has a short window of detection, and in some cases may detect same-day cannabis use.Ī 2020 review found that THC was still detected in the oral fluid of frequent smokers 72 hours after use. However, its metabolites are only present in saliva when you have personally smoked or ingested cannabis. THC can enter the saliva through exposure to secondhand cannabis smoke. However, in cases of heavy use, it’s been detected 30 days after last use.Ĭhronic heavy use increases the length of time that it can be detected. chronic heavy use (multiple times per day): more than 30 daysīlood tests typically detect recent cannabis use, or use that has occurred within the last 2–12 hours. ![]() ![]() moderate use (four times per week): 5–7 days.single use ( one joint, for example): 3 days.While detection windows may vary, a 2017 review suggests that cannabis may be detectable in urine for the following amounts of time after last use: Urine testing is the most common drug testing method. What’s the detection window for different cannabis drug tests? Urine tests
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