An edible high typically lasts 6 to 8 hours from start to finish, though effects can stretch up to 12 hours depending on the dose, your tolerance, and whether you ate beforehand. That’s significantly longer than smoking or vaping, which usually wears off within a few hours.
The Full Timeline of an Edible High
Edibles follow a slow, predictable arc. Effects typically begin 30 to 60 minutes after you eat them, though some people don’t feel anything for up to two hours. Peak intensity hits around three hours after consumption, when THC levels in your blood are at their highest. From there, the high plateaus and gradually tapers off over one to two hours.
A standard 5 mg edible, for example, lasts roughly 2 to 4 hours for someone with moderate experience. But that same dose can last up to 6 hours for someone with low tolerance or a slower metabolism. Higher doses extend the timeline further. The Canadian Centre on Substance Use and Addiction puts the outer limit of edible effects at 12 hours, compared to about 6 hours for inhaled cannabis.
Why Edibles Hit Differently Than Smoking
When you smoke or vape cannabis, THC passes directly from your lungs into your bloodstream and reaches your brain within minutes. When you eat an edible, THC takes a detour through your digestive system and liver first. Your liver converts THC into a different active compound that crosses into the brain more easily and produces a stronger, longer-lasting effect. This is why the same amount of THC feels more intense and lingers longer as an edible than it does when inhaled.
The liver processes this converted compound slowly, which is why the high builds gradually and fades gradually rather than hitting fast and dropping off. It also means the effects taper more gently. You won’t go from high to sober in 20 minutes the way you sometimes can with smoking.
What Makes Your Experience Shorter or Longer
Several factors shift the timeline in both directions:
- Dose: Higher milligram doses produce longer-lasting effects. A 5 mg edible and a 50 mg edible are very different experiences in both intensity and duration.
- Tolerance: Regular cannabis users metabolize THC faster and typically feel effects for a shorter window. Infrequent users get longer, more intense highs from the same dose.
- Metabolism: People with faster metabolisms process THC more quickly, shortening the high. Body composition plays a role here too, since THC is fat-soluble and can be stored in fat tissue.
- Stomach contents: Taking an edible on an empty stomach means faster absorption, a quicker onset, and a more intense but potentially shorter peak. Eating an edible with a meal, especially one containing fat, slows absorption and makes the effects more prolonged. Fats increase THC’s bioavailability, meaning more of the compound actually makes it into your bloodstream.
Does CBD Shorten the High?
A common belief is that CBD counteracts THC and can help you come down faster. Research from Johns Hopkins tells a different story, at least for edibles. In a study using cannabis brownies, participants who consumed THC combined with a high dose of CBD reported stronger overall drug effects, more unpleasant side effects, greater memory and attention impairment, and a larger increase in heart rate (25 beats per minute above baseline, compared to 10 with THC alone). The effects were also longer-lasting.
This likely happens because CBD interferes with the same liver enzymes that break down THC, effectively slowing THC’s clearance from your body. So adding CBD to an edible may make things more intense, not less.
How Long Edibles Stay in Your System
The high wears off long before THC leaves your body. If you’re concerned about drug testing, the detection windows are considerably longer than the period you actually feel anything.
THC from edibles is detectable in blood for roughly 2 to 12 hours after use. Urine tests have a much wider window: 1 to 30 days, depending heavily on how often you use cannabis. A single edible for an occasional user might clear urine in a few days, while daily use can keep THC metabolites detectable for a full month. This is because THC accumulates in fat tissue over time and releases slowly.
If the Effects Last Too Long
One of the most common problems with edibles is taking more before the first dose kicks in. Because the onset can take up to two hours, it’s easy to assume the edible isn’t working and eat another. This often leads to an uncomfortably strong high that lasts well beyond the typical timeline.
There’s no reliable way to end an edible high early once it starts. Hydration, rest, and a calm environment can help you ride it out more comfortably, but the THC still needs to be processed through your liver. The effects will fade on their own, usually within 12 hours even in worst-case scenarios. Starting with a low dose (2.5 to 5 mg) and waiting at least two hours before considering more is the most practical way to avoid an unpleasantly long experience.