If you’re too high right now, the most important thing to know is that this feeling is temporary and not dangerous. THC cannot cause a fatal overdose. What you’re experiencing, whether it’s racing thoughts, paranoia, a pounding heart, or a sense that time has stopped, will pass on its own. Most inhaled cannabis highs peak within 10 minutes and fade over 1 to 3 hours. Edibles take longer, peaking at 2 to 4 hours, but they also end.
Here’s what you can do right now to bring yourself back down.
Breathe Slowly and Ground Yourself
Anxiety from THC tends to snowball. Your heart speeds up, you notice it, and that makes you more anxious, which speeds your heart up further. Controlled breathing breaks that loop. Try box breathing: inhale for 4 counts, hold for 4, exhale for 4, hold for 4, and repeat. Another option is 4-7-8 breathing, where you inhale for 4 counts, hold for 7, and exhale slowly for 8. Focus on feeling the air move through your nostrils and your belly rise and fall. This shifts your attention from the anxiety to something physical and rhythmic.
If the breathing alone isn’t enough, try the 5-4-3-2-1 grounding technique. Look around and name 5 things you can see, 4 things you can touch, 3 things you can hear, 2 things you can smell, and 1 thing you can taste. This works because it forces your brain to engage with the real, immediate world rather than spiraling inward. You can also try squeezing your fists tightly for 10 seconds, then releasing them. Giving that anxious energy somewhere physical to land can make the rest of your body feel lighter.
Smell or Chew Black Pepper
This one sounds like stoner folklore, but there’s real chemistry behind it. Black peppercorns are rich in a compound called beta-caryophyllene, which is classified as a “dietary cannabinoid” because it binds directly to cannabinoid receptors in your body. Specifically, it activates CB2 receptors, which are involved in calming inflammation and modulating your immune response. This interaction appears to take the edge off THC’s more intense psychological effects.
You don’t need to eat a handful. Crack a few whole peppercorns and sniff them, or chew on two or three. The smell alone can help. The sharp sensory jolt also doubles as a grounding technique, pulling your focus to something immediate and physical.
Sniff or Eat Citrus
Lemons, limes, and oranges contain a terpene called limonene that directly reduces THC-induced anxiety. A study from Johns Hopkins found that when people inhaled limonene alongside THC, their self-reported feelings of anxiety and paranoia dropped in a dose-dependent way. At the highest dose tested, participants rated themselves significantly less “anxious/nervous” and “paranoid” compared to THC alone.
Peel a lemon or orange and inhale the scent from the rind, where limonene is most concentrated. You can also squeeze lemon into water and drink it. Some people find that lemon zest in warm water is especially soothing because it combines the limonene with hydration and warmth.
Eat Something and Hydrate
Food helps for a couple of reasons. Eating gives your body something to process alongside THC, and the act of chewing and tasting is grounding in itself. Simple carbohydrates and familiar comfort foods work well. Think toast, crackers, fruit, or a bowl of cereal. Avoid anything that might feel strange or unfamiliar in your current state.
Drink water or juice. Dehydration worsens the dry mouth and lightheadedness that THC causes, and having something cold to sip gives you a sensory anchor. Avoid alcohol, which intensifies THC’s effects and can make nausea worse.
Skip the CBD Edible
You may have heard that CBD counteracts THC. The reality is more complicated, and in some forms it can backfire. A Johns Hopkins study found that when people ate edibles containing both THC and a high dose of CBD (640 mg), the THC in their blood nearly doubled compared to eating the same amount of THC alone. The participants experienced stronger drug effects, more cognitive impairment, greater increases in heart rate, and more unwanted side effects. CBD changed how the liver processed THC, making it hit harder and last longer.
This applies primarily to oral CBD products like edibles, tinctures, or capsules, where both compounds pass through the liver together. If you’re already too high from an edible, adding a CBD edible on top could make things worse, not better.
Why THC Sometimes Triggers Anxiety
THC binds to cannabinoid receptors throughout your brain, but not all brain regions respond the same way. In the prefrontal cortex and hippocampus, mild THC activation tends to reduce anxiety. But in the amygdala, your brain’s threat-detection center, even small amounts of THC can trigger an anxiety response. These opposing effects happen simultaneously, and the balance between them determines whether you feel relaxed or panicked.
This is why the same person can feel calm from cannabis one day and paranoid the next. Your mental state going in, your environment, the strain, and the dose all shift which brain regions dominate the experience. It also explains why lower doses tend to be calming while higher doses tip toward anxiety: more THC means more stimulation of the amygdala.
How Long This Will Last
If you smoked or vaped, your high peaked within about 10 minutes of inhaling. The most intense effects typically last 30 minutes to an hour, with a gradual comedown over another 1 to 2 hours. You’ll likely feel mostly normal within 3 hours total.
Edibles follow a very different timeline. THC from food is absorbed slowly and processed through the liver, which converts it into a more potent form. Peak effects arrive 2 to 4 hours after eating, and the high can last 4 to 8 hours, sometimes longer. If you ate an edible recently and feel like it’s getting more intense, it may still be coming on. This is normal with edibles and does not mean something is wrong. The intensity will plateau and then gradually fade.
What a “Green Out” Looks Like
A green out is an intense reaction to too much THC. Symptoms include nausea, vomiting, dizziness, sweating, pallor, and feeling like you might faint. It’s deeply unpleasant but not medically dangerous in most cases. Lying down on your side, sipping water, and waiting it out is usually all you need.
The situations that do warrant calling for help are rare: if someone becomes unresponsive and cannot be woken up, if they’re having serious trouble breathing, or if they have no pulse. These scenarios are extremely uncommon with cannabis alone and typically involve other substances. If you’re conscious and reading this article, you are going to be fine.
Comfort Strategies While You Wait
Change your environment. If you’re in a loud or crowded place, move somewhere quiet. If you’re alone in a dark room spiraling, turn on a light and put on something familiar, like a TV show you’ve seen before or music you love. Novelty feeds anxiety when you’re too high. Familiarity does the opposite.
A cool washcloth on your forehead or the back of your neck can lower your perceived heart rate and provide a strong sensory anchor. A warm shower works for some people, though if you’re dizzy, sitting down is safer. Talk to someone you trust, even just to say “I’m too high and I need to ride this out.” Saying it out loud often takes away some of its power.
Remind yourself of one fact: no one has ever died from a cannabis overdose. Your body will process the THC, your receptors will return to baseline, and this will become a story you tell later. For now, breathe, sniff a lemon, chew some pepper, and let time do its job.