A single 5mg edible is a low dose, but THC and its byproducts can linger in your body far longer than the high itself. For most occasional users, a one-time 5mg dose will clear from urine in roughly 3 to 4 days, though the exact timeline depends on the type of drug test, how often you use cannabis, your body composition, and your metabolism.
Why Edibles Stay Longer Than Smoking
When you eat a cannabis edible, THC takes a detour through your digestive system before reaching your liver. The liver converts THC into a more potent form that crosses into the brain more effectively, which is why edible highs tend to feel stronger and last longer than smoking the same amount. This two-step process also means your body produces more of the metabolite that drug tests actually look for. That metabolite is fat-soluble, so it gets absorbed into fat tissue and then slowly trickles back into your bloodstream over time.
The high from a 5mg edible typically lasts 4 to 6 hours. But “feeling sober” and “testing clean” are very different timelines. Drug tests don’t measure THC itself. They detect the leftover byproducts your liver creates while breaking it down, and those byproducts stick around much longer.
Detection Windows by Test Type
Urine Tests
Urine testing is the most common method for workplace and pre-employment screening. Federal guidelines set the initial screening threshold at 50 ng/mL, with a confirmatory cutoff of 15 ng/mL. For an occasional user taking a single 5mg edible, the metabolite typically clears urine within 3 to 4 days. Frequent users face a much wider window because THC metabolites accumulate in fat with repeated exposure, extending the terminal elimination time to 12 days or more.
The difference is significant. In occasional users, the urinary elimination half-life of THC’s main metabolite ranges from about 9 to 27 hours. In chronic users, the terminal half-life stretches to 12 days or longer, because the body has to slowly pull stored cannabinoids out of fat tissue before it can excrete them.
Saliva Tests
Saliva (oral fluid) tests have the shortest detection window. Cannabis is generally detectable in saliva for up to 24 hours after use, making this the least worrisome test for a single low dose. The federal screening cutoff for oral fluid is 4 ng/mL for THC, with a confirmatory threshold of 2 ng/mL. These tests detect the parent compound rather than metabolites, so they’re really measuring recent use rather than what’s stored in your body.
Blood Tests
Blood tests are less common for employment screening but are sometimes used in legal or medical contexts. THC itself disappears from blood relatively quickly. Plasma half-life is roughly 1.5 hours in occasional users and about 2 hours in regular users. After a single 5mg edible, THC is typically undetectable in blood within 24 to 48 hours, though metabolites may persist a bit longer.
Hair Tests
Hair follicle tests can cover up to a 90-day window and are designed to detect patterns of repeated use rather than isolated incidents. A standard hair sample of about 3.9 centimeters covers approximately 90 days of history. The good news for someone who took a single 5mg dose: hair tests are considered a “lifestyle” test and are generally not sensitive to one-time or very infrequent use. They’re not typically used for post-accident or reasonable suspicion testing for this reason.
Factors That Affect Your Clearance Time
The biggest variable is how often you use cannabis. A single 5mg edible in someone who hasn’t used in months will process differently than the same dose in someone who uses weekly. Roughly 70% to 90% of a THC dose is excreted within 3 to 5 days through urine and stool, but that applies to occasional users without significant THC stored in their fat.
Body fat percentage matters because THC metabolites dissolve in fat. People with higher body fat may retain metabolites slightly longer, as the compounds form stable bonds with fatty acids in adipose tissue. The rate-limiting step in clearing THC from your system is actually the speed at which it redistributes from fat back into the bloodstream for processing.
Metabolism, hydration, and physical activity play a role, but a modest one. Exercising, eating well, and drinking water may help slightly, but nothing dramatically accelerates the process once THC metabolites are in your system. Your body simply needs time to process them out.
Realistic Timeline for a One-Time 5mg Dose
If you’re an occasional user and you took a single 5mg edible, here’s a practical summary of what to expect:
- Saliva test: likely clear within 24 hours
- Blood test: likely clear within 24 to 48 hours
- Urine test: likely clear within 3 to 4 days, possibly sooner
- Hair test: a single low dose is unlikely to produce a positive result, though the theoretical window extends to 90 days
These timelines shift if you use cannabis regularly. Even a few uses per week can push urine detection out well beyond a week, because each dose adds to the metabolite reservoir in your fat tissue. The 5mg dose itself is small, but your usage history is what really determines how long your system holds onto it.