Edible cannabis effects typically last six to eight hours, though some people feel residual effects for up to 12 hours. That’s significantly longer than smoking or vaping, which usually wears off within one to three hours. The reason for the difference comes down to how your body processes THC when you swallow it versus inhale it.
The Full Timeline From Start to Finish
Edibles take 30 to 60 minutes to kick in, though some people don’t feel anything for up to 90 minutes. This slow onset is one of the reasons people accidentally take too much: they assume the first dose didn’t work and take more before the first one has even hit.
Peak intensity arrives around three hours after you eat the edible. This is when you’ll feel the strongest effects on mood, perception, coordination, and cognition. From there, the high gradually tapers off over the next several hours. Most people are back to baseline somewhere between six and eight hours after eating the edible, but higher doses or slower metabolisms can stretch this to 12 hours.
Compare that to smoking, where effects hit within minutes, peak at around 30 minutes, and largely fade within two to three hours. Edibles operate on a completely different clock.
Why Edibles Last So Much Longer
When you smoke or vape cannabis, THC passes through your lungs directly into your bloodstream and reaches your brain almost immediately. When you eat an edible, THC takes a detour through your digestive tract and liver first. Your liver converts delta-9-THC into a different compound called 11-hydroxy-THC, which is actually more potent than regular THC and crosses into the brain more easily.
This converted form is more psychoactive and takes longer for your body to clear. It’s also released gradually as your stomach and intestines continue breaking down the food, so you’re getting a slow, sustained wave of THC rather than a single rapid hit. That’s the core reason edibles feel stronger and last longer than the same amount of THC inhaled.
What Changes the Duration
Six to eight hours is a reliable average, but the actual window varies quite a bit from person to person. Several factors push the duration shorter or longer:
- Dose: A 5 mg edible will wear off faster than a 25 mg edible. Higher doses mean more THC for your liver to process, which extends the timeline.
- Metabolism: People with faster metabolisms clear THC more quickly. Age, activity level, and genetics all influence metabolic speed.
- Body fat: THC is fat-soluble, so it accumulates in fat cells and gets released slowly over time. People with higher body fat percentages tend to retain THC longer.
- Stomach contents: Eating an edible on an empty stomach generally produces a faster onset and a shorter, more intense experience. Taking one after a full meal slows absorption and can extend the overall duration.
- Tolerance: Regular cannabis users process THC differently and may feel effects for a shorter period, while infrequent users often experience longer, more intense highs.
Mixing Edibles With Alcohol
Alcohol and cannabis are both central nervous system depressants, meaning they both slow brain activity, coordination, and reaction time. Combining them doesn’t just add the effects together; it compounds them. Even low-dose cannabis impairs motor function and cognition, and alcohol stacked on top amplifies those impairments significantly.
The timing mismatch makes this especially tricky with edibles. Alcohol kicks in within about 30 minutes, while an edible can take 90 minutes or more to fully peak. If you have a drink at 7 pm and a gummy at 8:30, you might feel fine for a while, then get hit with both substances circulating at full strength simultaneously. This can lead to unexpected sedation, dizziness, vomiting, or panic. If you’ve mixed the two, plan for effects to last longer than usual.
The Next-Day Hangover
Even after the main high wears off, some people wake up the next morning still feeling off. Commonly reported symptoms include fatigue, brain fog, dry mouth, dry eyes, headaches, and mild nausea. This is sometimes called a “weed hangover,” and it’s more likely after high doses or with edibles specifically, since THC blood levels can remain elevated into the following morning.
Not everyone gets a cannabis hangover, and there’s no set timeline for how long it lasts. Dose, tolerance, and individual biology all play a role. A 2019 study found that cannabis use could cause daytime fatigue the following day. If you’re still feeling foggy, hydration, food, and light activity tend to help more than anything else.
How Long Before You Can Drive
Research suggests waiting at least six hours after using cannabis before getting behind the wheel. For edibles specifically, because effects can be delayed and last up to 12 hours, the safe window is longer. If you’ve combined cannabis with alcohol, you should wait even longer than that. The three-hour peak means your impairment is at its worst well after you ate the edible, not right away, so feeling “fine” at the two-hour mark is not a reliable indicator that you’re safe to drive.
How Long THC Stays Detectable
Feeling sober and testing clean are two very different timelines. Even after the high is completely gone, THC metabolites linger in your body and can show up on drug tests for days or weeks depending on the testing method:
- Blood tests: THC is only detectable for a few hours.
- Saliva tests: Detectable for up to 24 to 30 hours.
- Urine tests: Detectable for 1 to 30 days, depending on frequency of use. A single edible might clear in a few days, while daily use can keep metabolites present for a month.
- Hair tests: Detectable for up to 90 days.
THC’s fat solubility is the reason for those long urine and hair windows. Your body stores THC in fat tissue and releases it gradually, so even one dose can leave a detectable trace well beyond when you last felt any effects.