A cannabis high from smoking or vaping typically lasts 1 to 3 hours, while edibles can keep you feeling effects for 6 to 12 hours. The actual duration depends on how you consume it, how much you use, and how often you use cannabis. Here’s what to expect for each method and the factors that shift that timeline.
Smoking and Vaping
When you inhale cannabis, whether through a joint, pipe, bong, or vaporizer, the effects hit within 1 to 2 minutes. THC passes from your lungs directly into your bloodstream and reaches your brain almost immediately. The high peaks around 30 minutes in and then gradually tapers off.
For most people, the main effects last 1 to 3 hours. Some lingering effects, like mild relaxation or slight mental fog, can stretch to 8 hours depending on the dose. Vaporized cannabis follows roughly the same timeline as smoking, though some users report slightly cleaner onset and offset.
Edibles
Edibles take much longer to kick in and last significantly longer. You’ll start feeling effects somewhere between 30 minutes and 2 hours after eating, with most people noticing the onset around the 45-minute mark. Full effects can take up to 4 hours to peak, which is why people sometimes make the mistake of eating more before the first dose has fully hit.
The intoxicating effects of edibles can last up to 12 hours, with residual effects (grogginess, mild cognitive slowness) potentially lingering up to 24 hours. A more typical experience with a moderate dose is around 4 to 6 hours of noticeable effects. The slow digestion process means THC enters your bloodstream gradually, which both delays the onset and extends the ride.
Sublingual Products
Tinctures and oils held under the tongue fall somewhere between smoking and edibles. THC absorbs through the thin tissue under your tongue and enters the bloodstream within 5 to 10 minutes. Effects peak around 30 to 45 minutes and typically wear off within 1 to 2 hours. If you swallow the oil instead of holding it under your tongue, it behaves more like an edible, with a slower onset and longer duration.
What Makes Your High Shorter or Longer
The same dose of THC can produce noticeably different experiences in different people, and even in the same person on different days. Several factors explain why.
Tolerance: Regular cannabis users experience less intense and shorter-feeling highs compared to occasional users. Research confirms that frequent use blunts the subjective, cognitive, and physiological effects of THC across the board. If you haven’t used cannabis in weeks or months, the same amount will hit harder and last longer than it would for a daily user.
Body composition: THC is fat-soluble, meaning it gets absorbed into fatty tissue throughout your body before slowly redistributing back into your bloodstream. People with higher body fat percentages may experience a longer tail of mild effects as stored THC gradually releases. This is also why the high from edibles tends to last longer: THC processed through digestion produces a metabolite that is both more potent and more fat-soluble than inhaled THC.
Dose and potency: This one is straightforward. Higher-potency products and larger doses extend both the intensity and duration. A single hit of flower with 15% THC is a very different experience from a large dab of concentrate at 80% or more.
Mixing with alcohol: Combining cannabis and alcohol amplifies the effects of both. The high feels stronger and lasts longer, and impairment increases in ways that are hard to predict.
How Long Impairment Actually Lasts
Feeling “back to normal” and actually being unimpaired are not the same thing. Colorado’s Department of Transportation recommends waiting at least 6 hours after smoking cannabis containing less than 35 mg of THC before driving. For edibles containing less than 18 mg, the recommendation is at least 8 hours. Higher doses require even longer wait times, and combining cannabis with alcohol means you should wait well beyond those minimums.
These guidelines exist because THC affects reaction time, attention, and coordination in ways you may not fully notice yourself, especially during the tail end of a high when you feel mostly sober but aren’t performing at baseline.
Next-Day Effects
The idea of a “weed hangover” gets thrown around a lot, but the scientific evidence is thin. A systematic review of 20 studies found that the majority of cognitive tests (209 out of 345) showed no measurable next-day impairment from THC when tested 12 to 24 hours after use. A small number of tests did find some lingering effects on memory, perception, and divided attention, but those came from older, lower-quality studies with weaker research designs.
The strongest evidence of impairment beyond 12 hours came from flight simulator studies using doses around 20 mg of THC, but even those had significant design limitations. In practical terms, most people using moderate doses won’t have measurable cognitive impairment the next day, though heavy doses or edibles consumed late at night may leave you feeling foggy the following morning. That grogginess tends to clear within a few hours of waking.
Quick Comparison by Method
- Smoking/vaping: Effects in 1 to 2 minutes, peak at 30 minutes, last 1 to 3 hours
- Edibles: Effects in 30 minutes to 2 hours, peak at 2 to 4 hours, last 4 to 12 hours
- Sublingual: Effects in 5 to 10 minutes, peak at 30 to 45 minutes, last 1 to 2 hours
If you’re trying cannabis for the first time or returning after a long break, start with a low dose and give yourself more time than you think you’ll need, especially with edibles. The most common bad experiences come from taking a second dose before the first one has fully kicked in.