A cannabis high from smoking or vaping typically lasts 1 to 3 hours, while edibles can keep you feeling effects for up to 12 hours. The actual duration depends on how you consume it, how much you take, and how often you use cannabis. Here’s what to expect for each method and the factors that shift the timeline.
Smoking and Vaping
When you smoke or vape cannabis, effects begin within minutes. The high peaks almost immediately and generally lasts 1 to 3 hours, though lighter residual effects can linger for up to 8 hours. For most people, the core experience of feeling noticeably high wraps up within about 2 hours.
Dabbing and Concentrates
Dabs and other cannabis concentrates hit within seconds to a minute because of their high potency. Peak intensity arrives in the first 10 to 30 minutes. The main effects last about 1 to 2 hours for a single dab, with lighter residual effects stretching another few hours beyond that. If you take multiple dabs in a session, the experience can extend to 4 to 6 hours or more.
Edibles
Edibles follow a completely different timeline. You won’t feel anything for 30 minutes to 2 hours after eating one, and full effects can take up to 4 hours to peak. That slow onset catches a lot of people off guard, leading them to eat more before the first dose has kicked in.
Once the high arrives, it lasts much longer than smoking. The intoxicating effects can persist for up to 12 hours, with some residual grogginess or mild effects lasting up to 24 hours. This extended timeline happens because your liver converts THC into a different compound that reaches your brain more efficiently and is estimated to be 2 to 3 times more potent than the THC you originally consumed. That’s why edibles feel stronger and last longer, not just because they’re digested slowly, but because your body transforms THC into something more powerful during the process.
How Dose Changes the Timeline
Higher doses don’t just make you feel more high. They extend how long the experience lasts. In a study of oral cannabis at 10, 25, and 50 mg THC doses, the 10 mg dose produced noticeable subjective effects but no measurable cognitive impairment. The 25 mg and 50 mg doses markedly impaired both cognitive and motor functioning, with effects peaking 1.5 to 3 hours after ingestion and lasting considerably longer.
If you’re newer to cannabis or trying edibles for the first time, starting at 5 to 10 mg gives you a much shorter, more manageable experience than jumping to 25 mg or above. The difference isn’t just intensity. It’s hours added to your timeline.
Impairment Lasts Longer Than the High
This is the part most people get wrong. Research shows that people typically feel like their cannabis-related impairment has worn off about 90 minutes after smoking. But when researchers actually tested driving ability at that point, impairment was still measurable, even though participants felt confident they were fine to drive.
For inhaled cannabis, some studies suggest effects start to diminish around 4.5 hours, but most research points to 5 to 7 hours before nearly all impairment clears. Current safety guidelines suggest waiting 6 to 8 hours after smoking or vaping, and 8 to 12 hours after eating an edible, before driving or doing anything that requires sharp reflexes and judgment. The subjective feeling of being “back to normal” arrives well before your reaction time and coordination actually recover.
Next-Day and Residual Effects
The so-called “weed hangover,” that foggy, sluggish feeling the morning after heavy use, is real but generally mild. Working memory (your ability to hold and juggle information in your head for short periods) can be impaired for up to 36 hours after use, particularly with higher doses or frequent consumption. Beyond 36 hours, those deficits become harder to detect in most people.
Attention and concentration effects are less consistent. Some studies find measurable dips in focus after 12 hours of abstinence, while others find no meaningful difference between regular users and non-users even within 24 hours. The variability likely comes down to individual biology, how much you consumed, and how often you use cannabis.
For regular users who stop entirely, subtle cognitive effects like difficulty with impulse control and memory may persist for a few days to a few weeks, after which they typically resolve. The available evidence suggests these effects are not severe or permanently debilitating for most people, but they’re real enough to notice during that initial period.
Factors That Shift Your Timeline
- Tolerance: Regular users metabolize THC more efficiently and often experience shorter, less intense highs than occasional users taking the same dose.
- Body composition: THC is fat-soluble, so it’s stored in fat tissue. People with higher body fat percentages may experience slightly longer residual effects as THC is slowly released.
- Strain potency: Cannabis products range widely in THC content. Flower typically contains 15 to 30% THC, while concentrates can exceed 80%. Higher potency means a faster onset and often a longer duration.
- Eating beforehand: For edibles, consuming them on an empty stomach generally speeds up onset and intensifies the peak. A full stomach slows absorption but can extend the overall duration.
- Individual metabolism: How quickly your liver processes THC varies from person to person. Faster metabolizers clear the compound sooner, resulting in a shorter experience.