There’s no instant off-switch for a cannabis high. THC binds to receptors in your brain, and your liver has to metabolize it before the effects fully clear. But there are practical steps that can take the edge off, shorten how long you feel impaired, and help you ride it out more comfortably. Most of what matters comes down to calming your nervous system while your body does the work.
How Long You’re Actually Dealing With
Your timeline depends entirely on how the THC got into your system. If you smoked or vaped, THC hits peak concentrations in your blood within about 10 minutes, and the noticeable high typically fades within one to three hours. If you ate an edible, peak levels don’t arrive until two to four hours after ingestion, and the effects can stretch to six hours or longer. Edibles also produce a more sustained, even release of THC into your bloodstream, which is why they feel so different and why “greening out” on edibles is more common.
Knowing which category you’re in helps set realistic expectations. If you smoked too much 45 minutes ago, the worst is likely almost over. If you ate a strong edible an hour ago, you may not have peaked yet, and the strategies below become even more important.
What Actually Helps Right Now
Black Pepper
This is the most commonly cited home remedy, and it has a plausible mechanism. Black peppercorns contain a terpene called beta-caryophyllene that interacts with the same receptor system THC activates. Chewing two or three whole black peppercorns, or simply sniffing ground black pepper, may help dial down anxiety and the feeling of being overwhelmed. It won’t eliminate your high, but many people report a noticeable calming effect within minutes.
Citrus
Limonene, the compound that gives lemons and oranges their smell, has direct evidence behind it. A controlled study at Johns Hopkins gave healthy cannabis users vaporized THC with increasing doses of limonene and found that the highest limonene dose significantly reduced feelings of anxiety and paranoia compared to THC alone. Importantly, limonene didn’t change THC blood levels at all. It specifically dampened the anxious, paranoid edge without altering the rest of the experience. Sniffing lemon peel, squeezing fresh lemon zest near your nose, or drinking lemon water are all easy ways to get limonene exposure quickly.
Pine Nuts
Pine nuts contain alpha-pinene, a terpene that crosses into the brain and helps protect the chemical messengers responsible for memory and attention. Cannabis strains high in pinene tend to cause less short-term memory impairment than strains without it. Chewing a handful of pine nuts won’t reverse your high, but it may help with the foggy, forgetful feeling that makes being too stoned so disorienting.
Cold Water on Your Face and Wrists
Splashing cold water on your face triggers your body’s dive reflex, which slows your heart rate and activates your parasympathetic nervous system. If your heart is pounding and you feel panicky, this is one of the fastest physical resets available. Hold a cold, wet cloth against your forehead or run your wrists under cold water for 30 seconds.
Slow, Deep Breathing
A racing heart and shallow breathing feed the anxiety loop that makes a strong high feel unbearable. Breathing in for four counts, holding for four, and exhaling for six to eight counts activates the same calming branch of your nervous system as the cold water trick. Even two or three minutes of deliberate slow breathing can bring your heart rate down noticeably.
Stay Hydrated, Stay Fed
Dehydration makes every unpleasant symptom worse: dizziness, dry mouth, nausea, and that heavy-headed feeling. Sip water or a drink with electrolytes steadily rather than chugging a huge amount at once. Sugary drinks like juice are fine too and can help if your blood sugar has dropped.
If you can eat, a light snack helps. Some people find that eating something substantial seems to “ground” the high, especially with edibles. There’s no rigorous science confirming that food absorbs THC, but having something in your stomach can ease nausea and give your body something else to metabolize alongside the THC.
What to Avoid
Exercise
This one surprises people because exercise seems like it should help burn off a high. Research shows the opposite. THC is fat-soluble and gets stored in your fat cells. Moderate exercise significantly elevates THC blood levels in regular cannabis users by mobilizing fat stores and releasing stored THC back into the bloodstream. People with higher body fat percentages saw an even larger spike. If you’re trying to come down, vigorous exercise can actually re-intensify or prolong the experience.
Caffeine
Coffee or energy drinks can amplify the jittery, anxious side of being too high. If your main complaint is a racing heart or paranoia, caffeine will make both worse. Skip it until you’re closer to baseline.
More Cannabis
This sounds obvious, but if someone suggests a “different strain” will mellow you out, pass. Adding more THC to an already uncomfortable situation is unpredictable, and your liver is already working to clear what’s in your system.
Why Some People Get Hit Harder
About one in four people carry genetic variations that slow down the two main liver enzymes responsible for breaking down THC. If your body produces less active versions of these enzymes, THC lingers in your bloodstream longer and at higher concentrations. That means the same dose that barely affects your friend could leave you uncomfortably high for hours. This isn’t tolerance or experience level. It’s liver chemistry, and you can’t change it.
This is also why edibles hit some people disproportionately hard. When you eat THC, your liver converts it into a metabolite that’s more potent and longer-lasting than THC itself. If your enzymes are slow, that conversion process takes longer and produces a more drawn-out, intense experience.
If You’re Greening Out
Greening out means you’ve consumed more than your body can comfortably handle. Symptoms include nausea, dizziness, sweating, pallor, and sometimes vomiting. It feels terrible but is not medically dangerous in the vast majority of cases.
The priority is supportive care: lie down somewhere safe, ideally on your side in case of nausea. Keep sipping water. If you’re with someone, let them know what’s happening so they can keep an eye on you. Closing your eyes can help with dizziness but sometimes makes the “spins” worse, so find whichever position feels most stable. Most greening-out episodes resolve within 30 to 90 minutes for smoked cannabis and a few hours for edibles.
The Realistic Bottom Line
You can meaningfully reduce anxiety and paranoia with limonene, black pepper, cold water, and controlled breathing. You can support your body with hydration and light food. You can avoid making things worse by skipping exercise and caffeine. But you cannot force your liver to metabolize THC faster than it’s going to. The high will end. For smoked cannabis, you’re looking at one to three hours total. For edibles, plan on three to six. Everything above is about making that window as tolerable as possible.