A 25 mg THC edible typically lasts six to eight hours, with the most intense effects hitting around the three-hour mark. That’s significantly longer than smoking or vaping, and 25 mg is a strong dose that can produce powerful effects, especially if you don’t use cannabis regularly.
Timeline From Start to Finish
Edibles follow a slow, predictable arc. Effects first appear 30 to 60 minutes after you eat one, though this can stretch to two hours depending on what else is in your stomach. Peak intensity arrives between 1.5 and 3 hours after ingestion, and the overall experience runs six to eight hours before fully tapering off.
That timeline is much longer than inhaled cannabis, which peaks within minutes and fades in one to three hours. The difference comes down to how your body processes THC when you swallow it. Your liver converts THC into a different active compound that’s also fat-soluble, meaning it dissolves into fatty tissues like the brain and is released slowly over time. This is why the high builds gradually and lingers far longer than what you’d feel from a vape or joint.
Because your liver produces higher levels of this active compound during digestion than you’d ever get from inhaling, the same milligram amount can feel substantially stronger as an edible. This is especially relevant at 25 mg.
How Strong 25 mg Actually Is
Most state-regulated cannabis markets consider 5 mg a single serving and 10 mg a standard dose for someone with moderate experience. At 25 mg, you’re taking two and a half times that standard dose. For infrequent users, this is a lot.
In a controlled study of healthy adults who used cannabis infrequently, a 25 mg oral dose produced pronounced subjective effects and markedly impaired cognitive and psychomotor functioning compared with placebo. One participant in the 25 mg group vomited roughly three hours after ingestion. People who use cannabis rarely tend to be significantly more sensitive to its effects, while regular users develop tolerance that blunts the intensity at the same dose.
If you use edibles regularly, 25 mg may feel moderate or even mild. If you’re newer to edibles or use them occasionally, 25 mg can be overwhelming. The duration also tends to stretch at higher doses. A 5 mg edible might wind down in five or six hours, while 25 mg can keep you feeling effects toward the longer end of the six-to-eight-hour window or beyond.
What Affects How Long It Lasts
Several factors shift the timeline in either direction.
Food in your stomach. Taking an edible on an empty stomach speeds up onset, sometimes bringing effects on within 30 minutes, but can also make the peak feel more intense. Eating an edible after a meal, particularly one with fats like cheese, avocado, or nuts, can delay onset by one to two hours. Because THC is fat-soluble, a fatty meal may actually improve absorption overall, potentially intensifying and extending the experience even though it starts later.
Tolerance. Infrequent users are more sensitive to the same dose and may feel effects longer. Frequent users metabolize THC more efficiently and often report shorter, less intense experiences at the same milligram level.
Individual metabolism. Your body’s natural metabolic speed, body composition, and even genetic differences in liver enzymes all play a role. Two people can take the same 25 mg gummy and have noticeably different experiences in both intensity and duration.
Next-Day Effects
At 25 mg, it’s common to wake up the next morning still feeling some residual effects, sometimes called a “weed hangover.” Reported symptoms include fatigue, brain fog, dry mouth, dry eyes, headaches, and mild nausea. These aren’t universal. Some people feel completely fine the next day, while others notice grogginess that takes a few hours to clear. Higher doses and lower tolerance both make next-day effects more likely.
How Long to Wait Before Driving
Colorado’s Department of Transportation recommends waiting at least eight hours before driving after consuming an edible with less than 18 mg of THC. For a 25 mg dose, which exceeds that threshold, the recommendation is to wait even longer. Given that peak impairment hits around three hours and effects can persist for six to eight hours or more, planning to stay off the road for at least 10 to 12 hours after a 25 mg edible is a reasonable approach. Cognitive and motor impairment from edibles can persist even after the subjective high feels like it’s fading.