Marijuana edibles typically produce a high that lasts 6 to 8 hours, with some effects lingering up to 12 hours. That’s significantly longer than smoking or vaping, which usually wears off in 2 to 3 hours. The extended timeline is one of the most important things to understand about edibles, because it catches a lot of people off guard.
Full Timeline: Onset to Finish
Edibles follow a slow, drawn-out curve compared to inhaled cannabis. Here’s what that looks like in practice:
- Onset: 30 minutes to 2 hours after eating. Most people notice the first effects around the 30- to 60-minute mark, but it can take longer depending on your body and what else you’ve eaten.
- Peak: Around 3 to 4 hours after consumption. This is when the high feels strongest.
- Total duration: 6 to 12 hours of noticeable effects. A standard dose for most people falls in the 6- to 8-hour range, while higher doses can push effects past 12 hours.
- Residual effects: Some degree of grogginess or subtle impairment can persist up to 24 hours.
Compare that to smoking or vaping, where effects hit within seconds to minutes, peak at about 30 minutes, and largely clear within a few hours. The slower onset of edibles is the main reason people accidentally take too much. They eat a dose, feel nothing after an hour, take more, and then both doses hit at once.
Why Edibles Last So Much Longer
When you smoke cannabis, THC enters your bloodstream through your lungs and reaches your brain almost immediately. When you eat it, THC takes a completely different route. It passes through your stomach, gets absorbed by your intestines, and then travels to your liver before entering general circulation. This process, called first-pass metabolism, is slower, but it also transforms THC into a different compound that’s more potent and longer-lasting.
Your liver converts THC into a metabolite that crosses into the brain more easily. The result is a high that builds gradually, hits harder at its peak, and takes much longer to fully clear your system. Your intestines also play a role in this initial breakdown, which is part of why the timing varies so much from person to person.
What Changes How Long Your High Lasts
The 6-to-12-hour window is broad because individual biology matters a lot with edibles. Several factors shift the timeline in either direction.
Genetics may be the biggest wildcard. About one in four people carry a gene variant that causes their enzymes to break down THC less efficiently. For these individuals, the same dose produces a stronger and longer-lasting high compared to someone who metabolizes THC quickly. There’s no simple way to know which group you fall into without experience, which is one reason starting with a low dose is practical advice rather than just a formality.
Whether your stomach is full or empty also matters. Eating an edible on an empty stomach generally speeds up absorption and can intensify the peak. Taking one after a meal slows things down, potentially delaying onset but also spreading the effects over a longer period. Your overall metabolism, body composition, and tolerance to cannabis all play a role too, though these factors are harder to quantify.
Dose is the most controllable variable. Higher doses don’t just make the high more intense. They extend the duration as well, pushing effects well past the 8-hour mark. Research also shows that THC produces a biphasic response: low doses tend to feel stimulating and pleasant, while high doses can flip into sedation, anxiety, or discomfort. More is not simply “more of the same feeling.”
The Next-Day Hangover Question
Some people report feeling foggy or off the morning after taking edibles, especially at higher doses. Research on this is mixed. Some studies have found measurable cognitive effects the day after THC use, while others haven’t. What’s clearer is that if your blood still contains significant THC the following morning, you may genuinely still be feeling its effects rather than experiencing a true “hangover.” This is more likely with larger doses taken in the evening, where 12-plus hours of effects can easily bleed into the next day.
How Long to Wait Before Redosing
The standard guidance is to wait at least two hours before considering a second dose. A common starting dose is 2.5 to 5 milligrams of THC. Because the peak doesn’t arrive until 3 to 4 hours in, even the two-hour check-in won’t show you the full picture of what you’ve taken. If you feel nothing after two hours, a second small dose is reasonable. If you feel something, even mildly, waiting it out is the safer bet. The most common bad experiences with edibles come from impatience during that slow onset window.
Driving and Impairment
Edibles can impair your ability to drive for at least 8 hours, and as little as 10 milligrams of THC is enough to affect your reaction time and judgment. Colorado’s Department of Transportation advises waiting several hours after consuming cannabis before getting behind the wheel. Given that edible effects can last 12 hours and residual impairment can linger up to 24, planning ahead for transportation is worth the thought, particularly with higher doses or if you’re newer to edibles.