A 5 mg dose of THC taken as an edible typically produces effects that last six to eight hours, with the most intense period occurring around three hours after you eat it. That’s considerably longer than smoking or vaping the same amount. The full timeline, from first feeling it to fully returning to baseline, depends on your tolerance, body composition, and genetics.
The Full Timeline of a 5 mg Edible
Most people start feeling a 5 mg edible within 30 to 60 minutes, though it can take longer depending on what else is in your stomach. THC from edibles has to pass through your digestive system and liver before reaching your bloodstream, which is why the onset is so much slower than inhaled cannabis.
Peak blood levels of THC arrive roughly three hours after you eat it. Clinical data on 5 mg oral THC capsules shows peak concentrations landing between 1 and 4.5 hours, with the average right around three hours. That peak window is when effects feel strongest: the most noticeable changes in mood, perception, and physical relaxation.
After the peak, effects gradually taper over the next three to five hours. Most people feel essentially back to normal by the six- to eight-hour mark, though some residual heaviness or mild fogginess can linger beyond that, especially if you’re new to THC.
How 5 mg Feels at Different Tolerance Levels
Five milligrams is often called a “standard dose,” but what that actually feels like varies enormously. If you have little or no tolerance to THC, 5 mg can produce strong effects: noticeable euphoria, altered time perception, increased appetite, and potentially some anxiety. For someone who regularly uses edibles, 5 mg is more likely to register as a mild, relaxed feeling without much cognitive disruption.
If you’ve only smoked cannabis before and are trying edibles for the first time, 5 mg sits in the mild-to-moderate range. Your liver converts THC into a more potent metabolite during digestion, which is why edibles often feel qualitatively different from smoking, even at comparable doses. That metabolite crosses into the brain more efficiently, producing effects that feel deeper and longer-lasting.
Why Duration Varies So Much Between People
Your liver enzymes play a major role in how quickly you process THC, and not everyone’s liver works at the same speed. A key enzyme responsible for breaking down THC has common genetic variants that dramatically change how fast the process goes. About 30 to 40% of metabolizing capacity is lost in one variant, and 80 to 90% in another. People who carry the slowest version can end up with THC blood levels roughly 300% higher than someone with the standard enzyme, and the effects last proportionally longer.
This isn’t rare or exotic. A meaningful percentage of the population carries one of these slower variants, and most people have no idea. If edibles seem to hit you harder and last longer than they do for your friends at the same dose, genetics is the most likely explanation.
Body fat matters too. THC is fat-soluble, meaning it gets absorbed into fatty tissue and then released slowly back into the bloodstream. People with higher body fat percentages may experience a longer tail of mild effects as stored THC gradually re-enters circulation. Eating a high-fat meal alongside an edible can also increase how much THC your body absorbs overall, potentially intensifying and extending the experience.
5 mg THC and Impairment
A study funded by the National Institute of Justice tested cognitive and motor performance after various cannabis doses. Oral doses of THC consistently impaired participants’ functioning, though the lowest vaped dose of 5 mg did not cause measurable impairment. Oral THC behaves differently in the body than inhaled THC, producing a longer and often stronger effect at the same milligram dose. Five milligrams eaten as an edible is not equivalent to 5 mg vaped.
The practical takeaway: plan to avoid driving or anything requiring sharp reflexes for at least six to eight hours after eating a 5 mg edible. If you’re newer to THC or know you metabolize it slowly, extending that window to 10 or even 12 hours is reasonable. The impairment from edibles tends to creep up gradually, which makes it easy to underestimate how affected you are during the peak window.
How Long 5 mg Stays Detectable
Effects wearing off and THC leaving your system are two very different timelines. You’ll feel normal long before a drug test would clear you.
For a single use at a low dose, urine tests using the standard 50 ng/mL cutoff typically detect THC metabolites for one to two days. At the more sensitive 20 ng/mL cutoff, that window extends to about three to seven days. These numbers come from studies on single-use events in otherwise clean subjects. If you use THC regularly, metabolites accumulate in body fat and detection windows stretch considerably longer.
Saliva and blood tests have shorter detection windows, generally one to three days after a single low dose, but the exact timing depends on the test sensitivity and your metabolism.
Edibles vs. Smoking: Why the Duration Differs
When you smoke or vape THC, it enters your bloodstream through your lungs within seconds. Effects peak in about 15 to 30 minutes and largely fade within two to three hours. Edibles take a completely different route. THC passes through your stomach, into your intestines, and then to your liver before reaching general circulation. That liver processing step converts a portion of the THC into a more potent form, which is why a 5 mg edible can feel stronger than 5 mg smoked.
This slower absorption also means the comedown is more gradual. Instead of a sharp rise and fall, edibles produce a slow climb, a broad peak, and a gentle descent. For many people that’s preferable, but it also means you’re committing to a longer experience. If you eat a 5 mg gummy at 7 p.m., expect to feel it until at least 1 a.m., with the strongest effects between roughly 9 and 11 p.m.