A cannabis high typically lasts 1 to 4 hours when smoked or vaped, and 6 to 8 hours when eaten as an edible. The actual duration depends on how you consume it, how much you use, your tolerance, and your body’s metabolism. In some cases, residual effects can linger up to 24 hours.
Smoking and Vaping: 1 to 4 Hours
When you smoke or vape cannabis, THC enters your bloodstream through your lungs and reaches your brain within seconds. Peak blood levels hit almost immediately, usually within 1 to 5 minutes, and that’s when you feel the strongest effects. The main high from smoking flower typically lasts 1 to 3 hours, though lighter effects can stretch to about 4 hours depending on how much you consumed and the potency of the product.
Vaping tends to follow a very similar timeline to smoking. Both deliver THC through the lungs, so the onset and duration are nearly identical. The difference is that vape cartridges can vary widely in THC concentration, which may shift how intense the peak feels and how long you notice effects afterward.
Edibles: 6 to 8 Hours
Edibles are a completely different experience. They take 30 to 60 minutes to kick in, sometimes up to 2 hours, and peak around 3 hours after you eat them. The total high generally lasts 6 to 8 hours, with higher doses sometimes producing effects that stretch to 12 hours or longer.
The reason edibles last so much longer comes down to how your body processes THC when you eat it. Instead of going straight to your brain through your lungs, the THC passes through your digestive system and into your liver. There, your liver converts it into a different compound that crosses into the brain more efficiently and is estimated to be 2 to 3 times more potent than the THC you inhale. This is why the same amount of THC in an edible can feel dramatically stronger and longer-lasting than smoking it. It’s also why edibles are easier to overdo, especially for people who don’t wait long enough for the first dose to kick in before taking more.
Dabs and Concentrates: 1 to 3 Hours
Dabbing concentrates like wax, shatter, or live resin produces an almost immediate onset, similar to smoking, but the intensity is much higher. Concentrates can contain 60% to over 90% THC compared to 15% to 30% in most flower. The peak hits within 15 to 30 minutes, the primary effects last 1 to 2 hours, and residual effects can hang around for 3 to 4 hours total. Despite the higher potency, the overall duration isn’t dramatically longer than smoking flower because the THC still enters through the lungs and follows the same metabolic pathway.
Tinctures: Somewhere in Between
Sublingual tinctures, the drops you hold under your tongue, fall between smoking and edibles in both onset and duration. Effects typically start within 15 to 45 minutes. The high lasts several hours but generally doesn’t stretch as long as a full edible, because some of the THC absorbs directly through the tissue under your tongue and bypasses the liver. If you swallow a tincture instead of holding it sublingually, it behaves more like an edible, with a slower onset and longer duration.
What Makes Your High Shorter or Longer
Two people can smoke the same joint and have noticeably different experiences. Several factors shift how long you stay high:
- Tolerance. Regular users build tolerance quickly. Someone who smokes daily may feel effects for an hour or less from the same amount that keeps an occasional user high for three hours.
- THC content. Higher-potency products produce more intense and generally longer-lasting effects. A 5 mg edible and a 50 mg edible are not just different in intensity; the higher dose can keep you feeling effects well into the next day.
- Body weight and metabolism. THC is fat-soluble, meaning it’s stored in body fat. People with higher body fat percentages may process THC differently, and individual metabolic rates affect how quickly your body clears the compound.
- Food in your stomach. Eating an edible on an empty stomach can speed up absorption and intensify effects. For smoking, eating a meal beforehand has less impact on timing but can influence how the high feels overall.
- How much you use. This is the most straightforward variable. More THC means a longer high, regardless of the method.
The Afterglow and Next-Day Effects
Even after the main high fades, you may notice lingering effects. Some people describe a foggy or sluggish feeling the next morning after a heavy session, sometimes called a “weed hangover.” The Washington State Liquor and Cannabis Board notes that short-term effects from cannabis can last up to 24 hours, and edible effects can persist just as long. These residual effects are typically mild compared to the peak, more of a mental haze or fatigue than an active high, but they’re worth knowing about if you have responsibilities the next day.
This extended window is also relevant for driving. There is no universally agreed-upon standard for cannabis impairment the way there is for alcohol. THC can remain detectable in your system for days or weeks after use, long after impairment has worn off, which makes roadside testing unreliable. As a practical matter, most of the acute impairment from smoking clears within 3 to 4 hours, but edibles can impair coordination and reaction time for much longer.
Quick Reference by Method
- Smoking or vaping flower: Onset in seconds to minutes, high lasts 1 to 4 hours
- Dabs and concentrates: Onset in seconds, high lasts 1 to 3 hours with residual effects up to 4 hours
- Sublingual tinctures: Onset in 15 to 45 minutes, high lasts several hours
- Edibles: Onset in 30 minutes to 2 hours, high lasts 6 to 8 hours (sometimes longer)