If you’re too high and want it to stop, the most reliable solution is time, but several strategies can genuinely reduce the intensity while you wait. Whether you smoked, vaped, or ate an edible, understanding how long your high will last and what actually works to take the edge off can make a uncomfortable experience much more manageable.
How Long You Need to Wait
The single biggest factor in how long your high lasts is how you consumed cannabis. If you smoked or vaped, effects peak within about 30 minutes and can last up to 6 hours, with some residual grogginess lingering up to 24 hours. Edibles are a different story entirely: they can take up to 4 hours to reach full intensity and last up to 12 hours, with residual effects also stretching to 24 hours.
This matters because if you ate an edible and feel overwhelmingly high, you may not even be at the peak yet. Knowing that the wave will eventually crest and recede can itself reduce panic. If you smoked, you’re likely past the worst of it within an hour or two.
Cold Water on Your Face
This one has real physiology behind it. Splashing cold water on your face or holding a cold, wet cloth (or ice pack) over your forehead and cheeks triggers something called the diving reflex. This reflex, controlled by the vagus nerve, dramatically slows your heart rate. It works in essentially all mammals, from mice to humans to blue whales.
A racing heart is one of the most unsettling parts of being too high, and it feeds the anxiety loop: your heart pounds, you notice it, you get more anxious, and it pounds harder. Activating the diving reflex interrupts that cycle. You don’t need a full cold shower. Just hold your breath briefly while pressing something cold against your face. The heart rate drop can make you feel noticeably calmer within seconds.
Eat Something Substantial
There’s a reason experienced cannabis users recommend food. Cannabis can affect blood sugar levels, and low blood sugar symptoms (dizziness, confusion, shakiness) overlap with and amplify the feeling of being too high. Eating a meal or snack with carbohydrates and protein helps stabilize blood glucose and gives your body something to process besides THC.
Sugary drinks or juice can work quickly for the blood sugar component, but a real snack with some fat and protein will sustain you longer. Peanut butter on toast, a banana, crackers with cheese: nothing fancy. The act of eating also grounds you in a familiar, routine activity, which helps psychologically.
Black Pepper and Citrus
Chewing on black peppercorns is one of the oldest folk remedies for being too high, and there’s some scientific basis for it. The terpenes in black pepper interact with the same receptor system that THC activates, potentially modulating the intensity of the high.
Limonene, the terpene responsible for the smell of citrus fruits, has stronger evidence. A double-blinded, placebo-controlled study from researchers at Johns Hopkins University and the University of Colorado found that limonene significantly reduced THC-induced anxiety, nervousness, and paranoia. The most effective dose in the study was quite concentrated (15 mg of limonene with 30 mg of THC), far more than you’d get from sniffing a lemon. But squeezing lemon zest, smelling citrus peels, or drinking lemon water may still provide some calming benefit, and it certainly won’t hurt.
Breathing and Distraction
Slow, deliberate breathing works for the same reason cold water does: it activates the vagus nerve and pulls your nervous system out of fight-or-flight mode. Breathe in for 4 counts, hold for 4, exhale for 6. The longer exhale is key because it’s the exhale phase that triggers the calming response.
Distraction is equally important. Put on a familiar, comforting show or movie. Listen to music you know well. Talk to a friend. Play a simple game on your phone. The goal is to redirect your attention away from monitoring how high you feel, because fixating on it reliably makes it worse. Many people report that the moment they stop checking in on their high, it becomes far more tolerable.
What About CBD and Ibuprofen?
CBD is widely believed to counteract THC, and there’s some pharmacological reason for this. CBD appears to modify how THC interacts with cannabinoid receptors in the brain, likely through an indirect mechanism rather than directly blocking THC. If you have CBD oil, a CBD tincture, or CBD gummies available, taking some may help blunt the intensity. It won’t immediately sober you up, but it can soften the edges, particularly the anxiety and racing thoughts.
Ibuprofen is a more surprising option. A study published in Cell found that THC causes cognitive and memory impairment partly by triggering an inflammatory enzyme called COX-2 in the brain. Ibuprofen inhibits COX-2. In animal models, blocking this enzyme eliminated THC-induced memory impairment and changes to brain cell connections. This doesn’t mean popping ibuprofen will instantly end your high, but a standard dose may reduce some of the foggy, confused feeling. Follow normal dosing guidelines and don’t take it on an empty stomach.
What Won’t Work
Coffee won’t sober you up. It may make you a more alert version of high, but the caffeine can also increase your heart rate and anxiety, making the experience worse. Exercise is sometimes recommended, and while a gentle walk in fresh air can help with distraction and grounding, intense exercise when your heart rate is already elevated can backfire. Forcing yourself to vomit won’t help either, especially if you smoked rather than ate an edible, since the THC is already in your bloodstream.
Signs That Need Medical Attention
The vast majority of “too high” experiences are deeply unpleasant but not dangerous. However, if you experience severe, repeated vomiting that won’t stop, signs of dehydration like very dark urine, dizziness, or fainting, or if you become suddenly confused and disoriented to the point where you don’t know where you are, those warrant a call to 911 or a trip to the emergency room. Chest pain or a heart rate that stays extremely elevated for more than an hour also deserves medical evaluation. You won’t get in trouble for seeking help.