A cannabis high from smoking or vaping typically lasts 1 to 3 hours, with effects peaking around 30 minutes after inhalation. Edibles last significantly longer, often 6 hours or more. The exact timeline depends on how you consume cannabis, how much you use, and how often you use it.
Smoking and Vaping: 1 to 3 Hours
When you inhale cannabis, whether from a joint, pipe, bong, or vape, you feel effects within seconds to a few minutes. The high peaks within about 30 minutes and then gradually tapers off. Most people feel the primary effects for 1 to 3 hours total, though some residual effects like mild fatigue or a slightly altered mood can linger for up to 24 hours.
Concentrates (dabs, wax, shatter) hit faster and harder than flower because of their higher THC content, but the overall duration is surprisingly similar. Dabs peak at 15 to 30 minutes, while flower peaks a bit later at 30 to 60 minutes. Both typically last in that same 1 to 3 hour range. The main difference is intensity, not length.
Edibles: 4 to 6 Hours or Longer
Edibles follow a completely different timeline. Effects take 1 to 2 hours to kick in because the THC has to pass through your digestive system and liver before reaching your brain. This is the window where many people make the mistake of eating more because they think the first dose “didn’t work.”
What makes edibles last so much longer is what happens in the liver. Your body converts THC into a different compound that is actually more potent than THC itself and enters the brain faster and in greater amounts. Blood levels of both psychoactive compounds peak 2 to 3 hours after ingestion and stay elevated for up to 6 hours. The total experience, from first feeling it to fully coming down, can stretch well beyond 6 hours depending on the dose.
This longer, less predictable timeline is also why edibles carry a higher risk of an uncomfortably intense experience. If you’re planning to eat an edible, block out enough time in your schedule knowing the effects could take more than 6 hours to fully fade.
Tinctures: Somewhere in Between
Cannabis tinctures taken under the tongue (sublingually) split the difference between smoking and edibles. The liquid absorbs directly into your bloodstream through the tissue under your tongue, bypassing the digestive system entirely. Effects typically begin within 15 to 45 minutes, faster than edibles but slower than inhaling. The high lasts several hours, longer than smoking but generally not as prolonged as a full edible experience.
If you swallow a tincture instead of holding it under your tongue, it behaves more like an edible, with a slower onset and longer duration.
How Tolerance Changes the Timeline
How often you use cannabis has a measurable impact on how long and how intensely you feel it. Regular users experience less pronounced effects across the board compared to occasional users. This includes not just the subjective feeling of being high but also cognitive and behavioral effects. One large analysis found that regular users showed significantly less impairment than occasional users from the same dose.
This means a daily user and a first-timer could consume the same amount and have very different experiences, both in intensity and duration. If you haven’t used cannabis in a while or are trying it for the first time, expect stronger and potentially longer-lasting effects than what a regular user might describe.
How Long Impairment Actually Lasts
The subjective high and the window of actual impairment are not the same thing. You may feel “back to normal” while your reaction time, memory, and decision-making are still affected. Research suggests that most driving-related cognitive skills recover within about 5 hours of inhaling 20 mg of THC, with nearly all skills recovered by 7 hours. Oral consumption takes longer to clear.
Current guidelines recommend waiting 6 to 8 hours after smoking or vaping before driving, and 8 to 12 hours after eating an edible. These windows account for the variability in potency and individual metabolism that makes it hard to judge your own impairment in the moment.
Next-Day Effects
The so-called “weed hangover” is real, though it’s subtle. In a study where frequent cannabis users were tested 12 to 15 hours after smoking, they didn’t show clear cognitive deficits on standard tests compared to a control group. However, they did report still feeling some drug effect the next morning.
The potency of what you use matters here. People who smoked higher-THC products or had higher THC concentrations in their blood the next morning performed worse on verbal memory and processing speed tests. So while a moderate session the night before may leave you feeling fine the next day, a heavy session with high-potency cannabis is more likely to leave you foggy, particularly with memory and mental sharpness.
Quick Reference by Method
- Smoking/vaping: onset in seconds to minutes, peak at 30 minutes, lasts 1 to 3 hours
- Concentrates (dabs): onset in seconds, peak at 15 to 30 minutes, lasts 1 to 3 hours
- Tinctures (sublingual): onset in 15 to 45 minutes, lasts several hours
- Edibles: onset in 1 to 2 hours, peak at 2 to 3 hours, lasts 6 hours or more