Edible cannabis effects typically last 6 to 8 hours, with some experiences stretching to 12 hours depending on the dose and your body. That’s significantly longer than smoking or vaping, which usually wears off in 1 to 3 hours. The reason comes down to how your body processes THC when you swallow it versus inhale it.
Why Edibles Last So Much Longer
When you eat an edible, THC travels to your small intestine, gets absorbed into your bloodstream, and passes through your liver before reaching your brain. This route, called first-pass metabolism, converts THC into a different compound that is roughly twice as psychoactive as THC itself. When you smoke or vape, THC bypasses the liver entirely and goes straight to the brain, which is why the high hits faster but fades sooner.
That liver-produced compound is the main reason edibles feel different and last longer. It crosses into the brain more effectively than regular THC and lingers in your system for hours. This also explains why many people describe edible highs as more intense or “body-heavy” compared to smoking the same amount of THC.
The Timeline: Onset, Peak, and Comedown
Effects typically begin 30 to 90 minutes after eating an edible, though some people don’t feel anything for up to two hours. The high reaches its strongest point around 2 to 3 hours after ingestion. From there, effects gradually taper off, with most people feeling back to baseline somewhere between 6 and 8 hours after their dose. Higher doses can push the total duration well past 8 hours, and in some cases, residual effects linger into the next day.
This slow timeline is the main reason people accidentally overconsume. They eat an edible, feel nothing after an hour, take more, and then both doses hit at once. A standard single serving is 10 mg of THC. If you’re new to edibles or trying a new product, waiting at least two full hours before considering a second dose can prevent an unpleasant experience.
What Makes It Shorter or Longer for You
Several personal factors shift the timeline in either direction. People with faster metabolisms tend to feel the effects sooner and clear them more quickly, because the body digests and processes the edible at a faster rate. Weight, sex, and age also play a role, though these interact in complex ways that make it hard to predict exactly how long your experience will last.
Whether you’ve eaten recently matters too. Taking an edible on an empty stomach generally means faster onset and potentially stronger effects, since there’s less food competing for absorption in the small intestine. A full stomach slows things down, which can delay the onset but may also stretch out the overall duration.
Dose is the single biggest factor. A 5 mg edible might produce mild effects that fade in 4 to 5 hours. A 20 or 30 mg dose can produce strong effects lasting 8 to 12 hours. Doses above that range carry a higher risk of unpleasant side effects that can persist for several hours or, in extreme cases, into the following day.
Next-Day After-Effects
Some people experience what’s often called a “weed hangover” the morning after taking an edible, especially at higher doses. Common complaints include fatigue, brain fog, dry mouth, dry eyes, headaches, and mild nausea. These aren’t universal, but they’re reported frequently enough to be worth expecting if you’ve taken a larger dose than usual or consumed an edible late in the evening.
Lethargy and mental sluggishness are the most common lingering symptoms. Research has found that cannabis use can lead to daytime fatigue the following day, and some studies have noted irritability and general low mood as after-effects. These typically resolve on their own within a few hours of waking, and staying hydrated and getting adequate sleep can help.
Can You Make It Wear Off Faster?
Once an edible is digested and THC is circulating in your bloodstream, there’s no reliable way to cut the experience short. Your liver has to process it at its own pace. Drinking water, eating food, and resting can help you feel more comfortable, but they won’t meaningfully speed up the timeline.
One popular claim is that CBD can counteract a THC high from edibles. A study from Johns Hopkins Medicine found the opposite: a high dose of CBD taken alongside THC in edible form actually nearly doubled the peak THC levels in participants’ blood compared to the same THC dose without CBD. Participants experienced stronger subjective effects, greater cognitive impairment, and a larger increase in heart rate. In edible form specifically, CBD appears to slow the breakdown of THC in the liver, making the high stronger and longer-lasting rather than shorter.
If you’re uncomfortably high, the most practical approach is to find a calm, safe environment, remind yourself that the feeling is temporary, and wait it out. Distraction with familiar music, a show, or light snacking can help the hours pass more comfortably.
How Long THC Stays Detectable
Feeling sober again doesn’t mean THC has left your body. The high wearing off and THC clearing from your system are two very different timelines. After a single use, THC metabolites can be detected in a urine test for about 3 days. Regular users face much longer detection windows, potentially weeks, because THC accumulates in fat tissue over time and releases slowly.
For driving, the impairment window extends beyond when you feel “normal.” Residual effects on reaction time and coordination can persist even after the obvious high has faded. The CDC recommends that if you’ve used cannabis, you plan for alternative transportation rather than trying to estimate when you’re safe to drive.