A cannabis high will always fade on its own, but if you’re uncomfortably high right now, there are ways to take the edge off and shorten how long the worst of it lasts. Most of the intense effects from smoking or vaping peak within minutes and taper over one to three hours. Edibles are a different story: effects don’t even begin until 30 to 60 minutes after ingestion and can peak anywhere from 1.5 to 3 hours later, with the full experience stretching well beyond that. Knowing your timeline helps, because the single most effective tool is also the simplest: riding it out.
Why You Feel This Way
THC binds to receptors in the brain that influence mood, perception, memory, and coordination. When you consume more than your body is comfortable processing, those effects amplify into anxiety, paranoia, a racing heart, nausea, or a sense that time has stopped. This is sometimes called “greening out.” It feels alarming, but it is not dangerous for most healthy adults. Your body is already metabolizing the THC and will continue doing so whether you intervene or not.
Breathe and Find a Calm Space
Anxiety feeds on itself. A racing heart makes you more anxious, which makes your heart race more. Breaking that loop is the fastest way to feel better. Sit or lie down somewhere you feel safe. Slow your breathing deliberately: inhale for four counts, hold for four, exhale for four. This activates your body’s built-in calming response and can lower your heart rate within minutes.
If you’re with people who are making the experience worse, it’s fine to step away. A quiet room, a familiar couch, or even a shower can reset your sensory environment enough to bring the intensity down a notch.
Eat Something and Hydrate
Cannabis can make some people more sensitive to drops in blood sugar, which amplifies dizziness, nausea, and that shaky, “wrong” feeling. Eating a snack with some sugar and carbohydrates (crackers, toast, fruit, a granola bar) can stabilize you. You don’t need a full meal. Just get something in your stomach.
Drink water or juice. Dehydration worsens dry mouth and headaches, and sipping on something gives you a simple physical task to focus on, which helps ground you when your thoughts are spiraling.
Try Black Pepper or Citrus
Chewing on a few black peppercorns is one of the most widely repeated home remedies for being too high, and there’s a plausible reason behind it. Black pepper contains a compound called caryophyllene, a terpene that interacts with the same receptor system THC does and is associated with reducing anxiety symptoms. The catch: the supporting research has mostly been done in animals, not in controlled human trials. Leah Sera, co-director of the medical cannabis science and therapeutics program at the University of Maryland School of Pharmacy, notes that no clinical trials have specifically tested peppercorns for cannabis-induced anxiety. Still, many people report that it helps, and chewing a peppercorn or sniffing ground pepper carries zero risk.
Citrus has a stronger evidence base. A 2024 study at Johns Hopkins gave 20 healthy adults vaporized THC alone or THC combined with d-limonene, the compound that gives lemons and oranges their smell. Adding limonene significantly reduced participants’ ratings of feeling anxious, nervous, and paranoid compared to THC alone, and the effect got stronger at higher doses. Limonene didn’t interfere with any of THC’s other effects or cause side effects of its own. You can get limonene by sniffing lemon peel, squeezing fresh citrus zest near your nose, or drinking lemon water. It won’t end the high, but it may meaningfully dull the anxiety.
CBD Can Dampen the High
If you have access to a CBD product (oil, tincture, or gummy without THC), it can help. CBD acts as what pharmacologists call a negative allosteric modulator at the same brain receptor THC activates. In plain terms, CBD changes the shape of the receptor so THC can’t bind to it as effectively, nudging it toward an inactive state. This doesn’t instantly cancel the high, but it can reduce the intensity, particularly the anxious, paranoid edge. A sublingual oil or tincture held under the tongue will absorb faster than a gummy you have to digest.
Skip the Workout
You might think burning off the high with exercise would help, but research suggests the opposite. A study of regular cannabis users found that 35 minutes of moderate-intensity cycling produced a statistically significant increase in blood THC levels. THC is fat-soluble, meaning your body stores some of it in fat tissue. When you exercise, your body breaks down fat for energy and releases that stored THC back into your bloodstream. The bump was modest (under 40%) and faded within two hours, but if you’re already uncomfortably high, temporarily raising your THC levels is the last thing you want.
Light movement like a short walk is fine and can help with restlessness. Just avoid anything vigorous.
Distraction and Grounding Techniques
Your brain on too much THC tends to fixate on how bad it feels, which makes it feel worse. Giving your mind something else to do is surprisingly effective. Watch a familiar, comforting show. Listen to music you know well. Play a simple game on your phone. Talk to a friend who knows you’re high and can reassure you.
If anxiety or paranoia is the main problem, grounding techniques borrowed from panic management work well. Hold an ice cube. Name five things you can see, four you can hear, three you can touch. These exercises force your brain to process real sensory information instead of spiraling through “what if” scenarios. They feel silly, and they work.
How Long Until It’s Over
If you smoked or vaped, the most intense effects typically peak within the first 15 to 30 minutes. You’ll likely feel noticeably better within an hour or two, with residual grogginess fading over the next few hours after that.
Edibles follow a much slower curve. Because THC has to pass through your digestive system and liver before reaching your brain, effects are “considerably delayed” compared to inhaled cannabis. Peak intensity arrives 1.5 to 3 hours after eating, and the full experience can last six to eight hours or longer. If you ate an edible recently and the effects are still building, know that this is normal. Don’t take more, and don’t panic. It will plateau and then gradually decline.
Signs That Need Medical Attention
Cannabis overconsumption is almost never life-threatening in healthy adults, but certain symptoms go beyond a bad high. Seek medical help if you experience severe, uncontrollable vomiting (which can cause dehydration), delusions or hallucinations that make you unable to tell what’s real, chest pain, or a heart rate that stays extremely fast and doesn’t slow with rest and breathing. Extreme confusion where you can’t recognize your surroundings or the people with you also warrants a call. The Poison Control Center hotline (1-800-222-1222) can help you decide whether you need emergency care or just need to wait it out.