If you’re too high right now, the most important thing to know is that it will pass. No one has ever died from a cannabis high alone, and your body is already working to break down THC. How long you need to wait depends on how you consumed it: smoking or vaping typically produces a high lasting 1 to 3 hours, while edibles can last 4 to 8 hours. In the meantime, there are real, practical things you can do to feel better faster.
Breathe and Ground Yourself First
THC can trigger a wave of anxiety or paranoia that feels overwhelming but is temporary. The fastest way to interrupt that spiral is to get your body and mind focused on something concrete. Try the 5-4-3-2-1 technique: name five things you can see, four you can touch, three you can hear, two you can smell, and one you can taste. This forces your brain out of the panic loop and back into the present moment.
If your heart is racing, slow your breathing deliberately. Inhale for four counts, hold for seven, then exhale for eight. Repeat this a few times. The long exhale activates your body’s calming response and can bring your heart rate down noticeably within a minute or two.
Other things that help: run cool water over your hands and wrists, clench your fists tightly for a few seconds and then release them, or do a simple stretch like bringing each knee to your chest while standing. Physical sensations pull your attention away from anxious thoughts and remind your nervous system that you’re safe.
Eat Something and Drink Water
THC tends to lower blood sugar, which can make dizziness, nausea, and that “greening out” feeling worse. Eating a snack, especially something with simple carbohydrates and a little fat, can help stabilize you. Toast with peanut butter, crackers, a banana, or even a handful of cereal will do.
Dehydration amplifies many of the uncomfortable side effects of being too high, including dry mouth, headaches, and lightheadedness. Sip water or juice slowly. Avoid alcohol, which will make you feel worse.
Try Black Pepper or Lemon
This sounds like folk wisdom, but there’s a real reason it shows up in so many recommendations. Black pepper contains a compound called beta-caryophyllene, the only terpene known to directly interact with cannabinoid receptors in your body. It binds to CB2 receptors in the immune system and peripheral tissues, which may help modulate the overall endocannabinoid response and ease anxiety. You don’t need to eat a spoonful. Just chew on two or three whole peppercorns, or sniff freshly ground black pepper.
Lemons contain limonene, a terpene that influences neurotransmitters in the brain and may reduce anxiety and the depressive feelings that sometimes accompany a strong high. Squeeze fresh lemon into water, chew on a lemon wedge, or even just peel a lemon and inhale the scent from the rind. The citrus oils are concentrated in the peel itself.
Pine nuts are another option worth trying. They’re rich in a terpene called pinene, which is associated with improved mental clarity and may help counteract the foggy, confused feeling that comes with too much THC. A small handful is enough.
Ibuprofen May Help With the Mental Fog
Research from Louisiana State University found that COX-2 inhibitors, the class of anti-inflammatory drugs that includes common ibuprofen, can reduce THC’s negative effects on memory and cognition in mice. THC triggers a chain reaction involving inflammation and a flood of a brain chemical called glutamate, which overwhelms certain connections and causes that characteristic mental impairment. Blocking COX-2 with ibuprofen appeared to prevent those cognitive disruptions while leaving THC’s other effects intact.
A caveat: the mice in that study received doses many times higher than a typical recreational user would encounter, so the effect at normal human doses isn’t fully confirmed. Still, a standard dose of ibuprofen is safe for most people and unlikely to cause harm, so it’s a reasonable option if the brain fog is what’s bothering you most.
How Long Each Method Lasts
Knowing when you’ll feel normal again depends entirely on how the THC got into your system:
- Smoking or vaping: Peaks within 10 to 30 minutes, then tapers over 1 to 3 hours total.
- Edibles: Can take 30 to 90 minutes just to kick in, and the full experience lasts 4 to 8 hours. If you ate an edible and you’re peaking, you’re likely somewhere around the 2-hour mark, meaning you’re closer to the other side than you think.
- Topicals: Onset in 15 to 45 minutes, lasting 2 to 4 hours, though topicals rarely produce a strong psychoactive high.
If you smoked, the worst is almost certainly behind you within an hour. If you took an edible, settle in somewhere comfortable and ride it out. The intensity will come in waves, and each wave will be a little smaller than the last.
What to Do While You Wait
Your environment matters more than you might expect. Move to a familiar, comfortable space. Dim bright lights. Put on a show or movie you’ve seen before, something predictable and comforting. Familiar sensory input gives your brain less to process and reduces the overstimulated feeling.
A warm shower or bath can help enormously. The sensation of water on your skin is naturally grounding, and the warmth relaxes tense muscles. If you have a pet nearby, spend time with them. The simple act of petting a dog or cat can lower your heart rate and redirect your focus.
If you can, try to sleep. Even lying down with your eyes closed in a dark room will help your body metabolize THC faster than if you’re up and active. Sleep is the single most effective way to fast-forward through a high you’re not enjoying.
CBD Can Take the Edge Off
If you have a CBD product on hand (oil, tincture, gummy), it can help. CBD acts as a negative allosteric modulator at cannabinoid receptors, which means it changes the shape of the receptor so THC can’t bind as effectively. It doesn’t block THC entirely, but it can soften the intensity and reduce anxiety. A dose of 25 to 50 mg of CBD is a reasonable starting point. Sublingual oils placed under the tongue will work faster than gummies, typically within 15 to 20 minutes.
Signs You Should Get Help
The vast majority of uncomfortable highs resolve on their own. But there are situations that warrant calling for help: if you can’t breathe normally, if you lose consciousness and can’t be woken up, if you experience chest pain, or if you feel genuinely disconnected from reality in a way that frightens you. These are rare, especially with cannabis alone, but they’re more likely if the product was unusually potent or if it was mixed with another substance you didn’t expect.
If someone near you has passed out and isn’t responsive, call 911. You won’t get in trouble for seeking help, and the medical team’s only concern is keeping that person safe.