A cannabis edible high typically lasts 4 to 12 hours, with most people experiencing 6 to 8 hours of noticeable effects. That’s significantly longer than smoking or vaping, and the reason comes down to how your body processes THC when you swallow it instead of inhaling it. The wide range depends on the dose, your metabolism, what you’ve eaten, and how often you use cannabis.
Onset, Peak, and Total Timeline
Edibles take 30 to 90 minutes to kick in, which is the most common source of trouble for first-timers who assume the product isn’t working and take more. Once THC passes through your stomach and liver, effects build gradually and reach peak intensity around 2 to 3 hours after you eat the edible. That peak window is when you’ll feel the strongest effects on mood, perception, coordination, and cognition.
After the peak, the high tapers off slowly over the next several hours. A moderate dose (5 to 10 mg of THC) in an occasional user will typically produce effects lasting 6 to 8 hours total. Higher doses, especially above 20 mg, can stretch the experience well past 8 hours, and some people report residual grogginess or a mildly altered feeling the next morning.
Why Edibles Last So Much Longer Than Smoking
When you inhale cannabis, THC enters your bloodstream through the lungs and reaches your brain within minutes. It peaks fast and fades relatively quickly. When you eat an edible, THC takes a detour through your digestive system and liver first. In the liver, an enzyme converts THC into a different compound called 11-hydroxy-THC, which is actually more potent than regular THC. It binds more strongly to cannabinoid receptors in the brain and crosses the blood-brain barrier more easily.
This process, called first-pass metabolism, produces significantly higher blood levels of 11-hydroxy-THC than you’d ever get from smoking. Both THC and its active metabolite are fat-soluble, so they distribute into fatty tissues throughout the body and release slowly over time. That slow release is why the effects feel like a long, gradual wave rather than a sharp spike.
What Makes Your Experience Shorter or Longer
Several factors can shift your timeline in either direction.
Dose is the most obvious variable. A 5 mg edible will produce a shorter, milder experience than a 25 mg one. Colorado’s transportation department recommends waiting at least 8 hours before driving after consuming less than 18 mg of THC, and longer for higher doses.
Stomach contents matter more than most people realize. Only about 6% of THC is absorbed when eaten in a low-fat food like a plain cookie. When THC is consumed with dietary fats (think butter, oil, or a full meal), bioavailability jumps to 10 to 20%. Fat helps carry THC through the intestinal wall and into the lymphatic system, which can both intensify and extend the high. Eating an edible on an empty stomach may speed up onset slightly, but eating it with a fatty meal can increase how much THC your body actually absorbs.
Genetics play a surprisingly large role. About one in four people carry a gene variant that causes their liver enzymes to break down THC less efficiently. For these individuals, the effects tend to be stronger and last longer, which may explain why some people have unexpectedly intense experiences from the same dose that feels mild to a friend.
Tolerance shortens the experience for frequent users. Regular cannabis consumers metabolize THC more efficiently and have downregulated cannabinoid receptors, meaning they’ll feel less from the same dose and the effects will fade sooner. An occasional user taking 10 mg might feel effects for 8 or more hours, while a daily user could feel relatively little after 4.
The Next-Day Hangover Effect
Some people feel “off” the morning after a strong edible. This isn’t a hangover in the alcohol sense, but high levels of THC can still be circulating in your blood the next day, especially after large doses. Symptoms can include grogginess, brain fog, mild nausea, and dry eyes. Not everyone experiences this, and it’s more common with doses above 20 mg or with products consumed later in the evening. The form of cannabis, dose strength, and individual tolerance all influence whether you’ll notice anything the next day.
How CBD in Edibles Changes the Timeline
Many edibles contain both THC and CBD, and there’s a common misconception that CBD “balances out” or softens the THC experience. Research from Johns Hopkins tells a different story. In a controlled study, participants who ate a brownie containing 20 mg of THC alongside 640 mg of CBD had nearly twice the blood levels of THC compared to those who ate a brownie with 20 mg of THC alone. Levels of the potent liver metabolite 11-hydroxy-THC were 10 times higher in the high-CBD group.
Participants in the high-CBD group reported stronger overall drug effects, more unpleasant side effects, greater difficulty performing routine tasks, and a larger increase in heart rate (25 beats per minute above baseline versus 10). The researchers concluded that high doses of CBD can create significant metabolic interactions that make THC effects stronger and longer-lasting. This doesn’t mean all CBD-containing edibles will cause problems, as the study used a very high CBD dose, but it’s worth knowing that CBD doesn’t simply cancel out THC.
Practical Timing to Keep in Mind
If you’re planning around an edible, the key numbers are: 30 to 90 minutes before you feel anything, 2 to 3 hours to reach peak intensity, and 4 to 12 hours of total effects depending on dose and personal factors. For most people taking a standard 5 to 10 mg dose, expect roughly 6 to 8 hours from start to finish.
Because the onset is so slow, the most practical advice is to wait at least 2 hours before considering whether to take more. The effects at the 45-minute mark are not representative of where you’ll be at the 3-hour mark. And if you’re planning to drive, Colorado’s guidelines suggest waiting a minimum of 8 hours after any edible under 18 mg, with additional time for higher doses.