THC edibles typically last 6 to 12 hours from the first felt effects to the last, with the strongest period hitting around 1.5 to 3 hours after you eat them. That’s significantly longer than smoking or vaping, which usually wraps up in 1 to 3 hours. The reason comes down to how your body processes THC when it goes through your digestive system instead of your lungs.
Why Edibles Last So Much Longer
When you swallow a THC edible, it travels through your stomach and into your small intestine before reaching your liver. Your liver converts the THC into a different active compound that is equal to or more potent than the original THC molecule. This process, called first-pass metabolism, is the key difference between edibles and inhaled cannabis.
After smoking, THC goes straight from your lungs into your bloodstream and brain within minutes. With edibles, your liver creates a steady supply of that more potent metabolite over several hours, which is why the high feels deeper and lasts so much longer. Your body also absorbs only about 6 to 20 percent of the THC in a swallowed edible, but what does get absorbed circulates for a long time.
The Full Timeline From Start to Finish
Most people feel the first effects 30 to 60 minutes after eating an edible, though chewable forms like gummies, brownies, and cookies can take longer because they need to be fully digested first. If you’ve eaten a large meal beforehand, expect the onset to be slower.
Peak effects hit between 1.5 and 3 hours after ingestion. This is when the high is at its strongest, and for doses above 10 mg, it can significantly affect thinking, coordination, and reaction time. A study testing 10, 25, and 50 mg doses in infrequent users found that 10 mg produced noticeable effects without impairing cognitive function, while 25 and 50 mg caused pronounced impairment.
After the peak, effects gradually taper over the next several hours. The total window from onset to feeling mostly normal can stretch to 10 or even 12 hours, especially with higher doses. Some people still feel residual effects the following morning.
How Dose Changes the Experience
Dosage affects both how intense and how long the experience feels. At lower doses (5 to 10 mg), you’re more likely to land on the shorter end of the spectrum, around 4 to 6 hours of noticeable effects. At higher doses (25 mg and above), the experience stretches closer to that 10 to 12 hour ceiling and is far more intense throughout.
The relationship isn’t purely linear, though. Doubling the dose doesn’t simply double the duration. What it does is raise the peak intensity substantially and keep blood levels of the active metabolite elevated for longer, meaning you spend more total time above the threshold where you feel high. For someone new to edibles, even 10 mg can produce a long, strong experience.
What Affects How Long Your High Lasts
Several factors create a wide range of individual experiences:
- Tolerance: Regular cannabis users metabolize THC differently than occasional users. The plasma half-life of THC is 1 to 3 days in occasional users but 5 to 13 days in chronic users, meaning frequent consumers have residual THC in their system that changes how new doses feel and how long they last.
- Body composition: THC is fat-soluble and gets stored in fatty tissue. People with higher body fat percentages may experience a longer tail of effects as THC is slowly released from those stores.
- Food and fat content: Eating an edible with a high-fat meal can increase THC absorption 2 to 3 times compared to taking it on an empty stomach or with low-fat food. More absorption means stronger and potentially longer effects.
- Genetics: Your liver relies on a specific enzyme (CYP2C9) to break down THC. Some people carry a genetic variant that makes this enzyme less efficient, meaning they metabolize THC more slowly and may feel effects for longer. Ongoing clinical research is actively studying how this variant influences THC levels and cognitive impairment.
Sublingual Products Work Differently
Not all “edibles” follow the same timeline. Tinctures and oils held under the tongue for 60 to 90 seconds are absorbed directly into the bloodstream through the tissue there, bypassing the digestive tract entirely. These sublingual products kick in faster, typically within 15 to 45 minutes, but wear off sooner, usually in the range of 4 to 6 hours rather than 8 to 12.
The tradeoff is speed versus duration. Sublingual products also have higher bioavailability (roughly 12 to 35 percent compared to 6 to 20 percent for swallowed edibles), so a lower dose can produce similar intensity. If you swallow a tincture instead of holding it under your tongue, it effectively becomes a standard oral edible, with the slower onset and longer duration that comes with digestion.
The “Edible Hangover”
With higher doses, it’s common to wake up the next morning still feeling off. People report fatigue, brain fog, dry mouth, dry eyes, headaches, and mild nausea. This isn’t technically a hangover in the alcohol sense. It’s often residual THC still circulating in your blood. If your blood THC levels are still elevated the morning after, you may genuinely still be somewhat high rather than experiencing an aftereffect.
Whether you experience this depends heavily on the dose, your tolerance, and when you took the edible. A 5 mg gummy eaten at 6 PM is far less likely to bleed into the next day than a 50 mg edible eaten at 10 PM. Not everyone gets these residual effects at all, and there’s no reliable way to speed up the process once THC is in your system. Your liver simply needs time to finish processing it.
Practical Timing to Keep in Mind
The most common mistake with edibles is taking more before the first dose kicks in. Because onset takes 30 to 60 minutes (and sometimes longer), people assume the first dose didn’t work and double up, only to have both doses peak at once. If you don’t feel anything after an hour, wait at least another 30 to 60 minutes before considering more.
Plan for the full duration. If you take an edible in the evening, a standard dose will likely still be active at bedtime and could affect your sleep quality or how you feel in the morning. For doses above 10 mg in someone without significant tolerance, it’s reasonable to assume you’ll feel some effects for 8 hours or more. Driving, operating equipment, or anything requiring sharp coordination should be off the table for at least that long.