A cannabis high typically lasts 1 to 3 hours when smoked or vaped, and up to 10 to 12 hours when eaten as an edible. The exact duration depends on how you consume it, how much you use, and how often you use cannabis. Even after the high fades, subtle cognitive effects can linger for several more hours.
Smoking and Vaping: 1 to 3 Hours
When you inhale cannabis, whether from a joint, pipe, bong, or vape pen, the effects begin within minutes. THC travels from your lungs directly into your bloodstream and reaches your brain almost immediately. The high peaks right away and then gradually tapers off over the next one to three hours, though lingering effects can stretch to eight hours in some cases.
The fast onset is also why smoking and vaping are easier to dose than edibles. You feel the effects quickly, so you can gauge where you are before deciding to consume more.
Dabs and Concentrates: Intense but Variable
Dabs and other cannabis concentrates contain around 80% THC, compared to roughly 15 to 25% in most flower. THC reaches the brain within 5 to 10 seconds of a dab, and the high can last anywhere from 30 minutes to several hours. The intensity is significantly stronger than smoking flower, but the overall duration follows a similar pattern to other inhaled methods. Because the THC dose is so concentrated, though, the comedown period and residual effects can be more pronounced.
Edibles: 6 to 12 Hours
Edibles take a completely different path through your body, which is why the experience lasts so much longer. After you swallow a gummy, brownie, or capsule, the THC passes through your digestive system before reaching your liver. There, your liver converts it into a different compound that crosses into the brain more efficiently and produces stronger psychoactive effects than the THC you inhale. This converted form also sticks around in your system much longer.
The practical timeline looks like this: you’ll start feeling effects 30 to 90 minutes after eating, with peak intensity hitting around 2 to 4 hours in. The total experience can last 10 to 12 hours. A National Institute of Justice study found that after oral THC doses, cognitive and motor effects peaked around five hours after consumption and didn’t fully return to baseline until eight hours later.
This slow onset is the reason people accidentally overdo it with edibles. You eat a gummy, feel nothing after an hour, eat another, and then both hit at once. If you’re new to edibles, waiting at least two hours before taking more is a good rule.
Tinctures: Somewhere in Between
Cannabis tinctures, the liquid drops you place under your tongue, split the difference between smoking and edibles. Effects begin within a few minutes to half an hour, and the high lasts one to six hours. Part of the THC absorbs through the tissue under your tongue (acting more like inhaled cannabis), while some gets swallowed and processed through the liver like an edible. The result is a middle-ground experience in both onset and duration.
Why Your High Might Be Shorter or Longer
The timelines above are averages. Several factors shift the experience in either direction.
Tolerance is the biggest one. Regular cannabis users consistently experience shorter, less intense highs than occasional users. Research shows that the behavioral and physiological effects of cannabis diminish with repeated exposure. Cognitive effects show the highest degree of tolerance, with some frequent users showing virtually no measurable impairment from doses that would significantly affect an occasional user. The intoxicating and euphoric effects also blunt with regular use, though not as completely. If you use cannabis daily, a high that would last three hours for someone new might feel like it fades in under an hour for you.
Dose and potency matter in the obvious way: more THC means a longer, stronger high. But body composition also plays a role. THC is fat-soluble, meaning it gets stored in fat tissue and released slowly. People with higher body fat percentages may experience slightly longer residual effects, and the same dose can hit differently depending on your metabolism, whether you’ve eaten recently, and your individual body chemistry.
How Long Impairment Actually Lasts
This is where things get important, because feeling sober and being sober aren’t the same thing. Your subjective high might fade after a couple of hours, but measurable impairment to reaction time, attention, and coordination can persist well beyond that.
A large meta-analysis looking at driving-related cognitive skills found that most abilities recover within about five hours of inhaling 20 mg of THC, with nearly all skills returning to normal within seven hours. For oral THC, impairment takes even longer to clear. The researchers concluded that people should wait at least five hours after inhaling cannabis before driving or performing any task where reaction time matters.
Interestingly, blood THC levels don’t reliably indicate how impaired someone is. A National Institute of Justice study found that THC concentrations in blood, urine, and oral fluid did not correlate with actual cognitive or motor impairment. Some participants showed significantly decreased functioning even when their THC levels were low. This means you can’t use “it’s been X hours” as a reliable rule. Your coordination and judgment may still be off even after the high feels like it’s completely gone, especially with edibles or high doses.
Quick Comparison by Method
- Smoking/vaping: onset in minutes, peak immediate, lasts 1 to 3 hours
- Dabs/concentrates: onset in seconds, peak immediate, lasts 30 minutes to several hours
- Edibles: onset in 30 to 90 minutes, peak at 2 to 4 hours, lasts up to 10 to 12 hours
- Tinctures: onset in minutes to 30 minutes, lasts 1 to 6 hours
Residual cognitive effects add roughly 2 to 4 hours beyond when the high itself fades, regardless of method. For edibles, plan on being affected for most of the day.