A cannabis edible typically takes 4 to 12 hours to fully wear off, with some residual effects lingering up to 24 hours. That’s a wide range, and where you fall within it depends on the dose, your metabolism, what you ate beforehand, and how often you use cannabis. Here’s what to expect at each phase and what influences the timeline.
The Full Timeline: Onset to Finish
Edibles follow a slow, predictable arc compared to smoking or vaping. Effects first appear 30 to 90 minutes after you eat one. They build gradually from there, reaching peak intensity around 2 to 3 hours in. That peak is the strongest you’ll feel, and it can catch people off guard if they took a second dose thinking the first one “didn’t work.”
After the peak, the high tapers over the next several hours. Most people feel noticeably less impaired by the 4- to 6-hour mark, but a heavier dose can keep effects going for 8 to 12 hours. Even once the main high fades, you may notice a foggy, slightly off feeling that stretches into the next day. This is sometimes called a cannabis hangover, and it’s more common with higher doses or late-night consumption.
Why Edibles Last So Much Longer Than Smoking
When you smoke cannabis, THC enters your bloodstream through your lungs and hits your brain within minutes. It also clears relatively quickly. Edibles take a completely different route. THC passes through your stomach and into your liver before reaching the rest of your body. In the liver, enzymes convert THC into a different active compound that crosses into the brain more easily and produces a stronger, longer-lasting high.
Both THC and this liver-produced compound are fat-soluble, meaning they dissolve into fatty tissues throughout your body, including the brain. Your body then releases them slowly over time rather than clearing them all at once. This slow release from fat stores is a major reason edible effects drag on for hours after the peak has passed, and why heavier users or people with more body fat sometimes feel effects even longer.
Dose Makes the Biggest Difference
The single most important factor in how long your edible lasts is how much THC you consumed. A standard low dose of 5 mg will generally produce milder effects that fade toward the shorter end of the 4- to 12-hour window. A 10 mg dose, often considered a “standard” single serving in regulated markets, pushes effects longer and stronger. Anything above 20 mg can easily produce a high that lasts 8 to 12 hours, with next-day grogginess being common.
If you’re new to edibles or have a low tolerance, even 5 mg can feel intense, and the duration may skew longer simply because your body isn’t accustomed to processing THC efficiently. Experienced users with higher tolerance often report shorter, less intense experiences from the same dose.
Food, Body Type, and Metabolism
What’s in your stomach when you take an edible changes the experience. On an empty stomach, THC absorbs faster, which means a quicker onset and potentially a more intense peak, though the total duration may be similar. On a full stomach, effects come on more slowly and tend to feel more gradual. Fatty foods like nuts, avocado, or peanut butter actually boost THC absorption because THC dissolves in fat. Eating a fat-rich meal or snack alongside an edible can make the high both stronger and smoother.
Your individual biology also plays a significant role. People with higher body fat percentages tend to retain THC longer because the compound stores in fat tissue and releases slowly. Faster metabolisms clear THC more quickly. And genetic differences in liver enzymes create real variation from person to person. Some people are genetically faster or slower at converting THC, which affects both how intense the high feels and how long it sticks around. This is why two people can eat the same gummy and have noticeably different experiences.
The Next-Day Hangover
Residual effects after an edible are real, even if they’re subtler than the high itself. Common complaints include fatigue, brain fog, dry mouth, dry eyes, headaches, and mild nausea. Research confirms that cannabis use can cause daytime fatigue the following day, and some studies have found irritability and low mood as after-effects. If you still have high levels of THC in your blood the morning after, you may actually still feel somewhat high rather than just groggy.
These lingering effects are more likely after high doses, late-evening consumption, or if you’re an infrequent user whose body isn’t efficient at clearing THC. Staying hydrated, eating a good meal, and getting enough sleep can help, but there’s no reliable way to speed up the process once THC is in your system.
How Long Before You Can Drive
Colorado’s Department of Transportation recommends waiting at least 8 hours after consuming an edible with less than 18 mg of THC before driving, biking, or doing anything safety-sensitive. If you consumed more than 18 mg, you should wait even longer. Given that edible effects can persist for 12 hours and residual impairment can stretch to 24, these minimums are worth taking seriously. Reaction time, attention, and coordination can all be affected even when you no longer feel “high” in an obvious way.
A practical rule: if you take an edible in the evening, plan on not driving until the following afternoon at the earliest, especially with doses above 10 mg. The slow, unpredictable metabolism of edibles makes them particularly risky for misjudging impairment.