The top pick is the stop-and-sit protocol: cut off all cannabis, get the person seated or lying on their side, and stay with them while the high fades. Every option below is judged on four criteria: how fast it can start, whether it adds a new risk such as a fall, a choking hazard, or a drug interaction, whether real evidence supports it, and whether it keeps medical help within reach if symptoms change.
Top pick: stop and sit
Acute THC intoxication, often called greening out, is unpleasant but usually self-limiting. The body clears THC on its own. The job is to prevent injury, panic, and aspiration while that happens. Inhaled cannabis peaks within minutes and eases over one to three hours. Edibles often peak between one and three hours after eating and can run six to eight hours or longer at high doses. Do not add more cannabis in any form while you wait.
- Move the vape, joint, drink, or edibles out of reach. Note the product, the estimated milligrams of THC, and the time of use. That detail matters if you call Poison Control.
- Seat the person on the floor or a low couch, or lie them on their side. Falls and fainting are the most common injuries in this state.
- Dim the lights, cut the noise, and keep the room cool. Panic feeds on stimulation.
- Offer small sips of water. Skip alcohol, caffeine, energy drinks, and any other drug.
- Say the timeline out loud: this peaks and then it fades, and you are not stuck like this. Short, plain reassurance works better than a lecture.
- Stay within arm's reach. No driving, no biking, no walking to the store alone.
- If they vomit, keep the head up or turn them on their side. Do not put fingers down the throat.
- Check breathing, skin color, and alertness every 15 to 20 minutes.
Pros
- Starts in seconds, costs nothing, and adds no new substance to the body.
- Addresses the two real dangers: injury and panic.
- Works for inhaled flower, vapes, edibles, and drinks alike.
Cons
- Does not shorten the high. It only manages it.
- Requires a sober person to stay present, which is not always possible.
- Hard to enforce when the person is agitated and wants to move.
Use it when: the person is breathing normally, can speak, and has no chest pain, seizure, or loss of consciousness. This covers most first-time overconsumption cases.
Water and a small snack
Low blood sugar and mild dehydration both mimic and worsen the dizziness and nausea of a strong high. A few crackers, a piece of bread, or a banana can settle the stomach faster than another hit of anything. Keep fluids to small sips. Chugging a quart of water on a queasy stomach often brings it right back up.
Is a Cannabis Overdose Fatal? Risks, Symptoms, and When to Get Help
Pros
- Fast, cheap, and available in most kitchens.
- Corrects a common cause of feeling shaky and lightheaded.
- Gives the person a simple task to focus on.
Cons
- Too much water at once can trigger vomiting.
- Choking risk if the person is drowsy or lying flat.
- Does nothing for the psychoactive effects themselves.
Use it when: the person is pale, sweaty, and shaky, or has not eaten in several hours. Keep them upright and awake for any food or drink.
Black pepper and citrus peel
This is the oldest folk remedy in the book: chew two or three black peppercorns, or bite into a strip of lemon or orange peel. The theory involves piperine and citrus terpenes such as limonene modulating how the high feels. No clinical trial shows that pepper reverses THC intoxication. What it does reliably is give a panicking person a concrete action and a strong sensory distraction.
Pros
- Immediate, inexpensive, and legal.
- Strong smell and taste pull attention away from the panic loop.
- Low risk for a healthy adult who can chew and swallow safely.
Cons
- No solid evidence that it lowers THC levels or ends the high.
- Peppercorns are a choking hazard, especially for children.
- Citrus peel can carry pesticide residue, and the acid can irritate an already queasy stomach.
Use it when: an adult has mild to moderate anxiety, is fully alert, and wants something to do. Skip it for kids, for anyone who is vomiting, and for anyone too drowsy to chew safely.
CBD to take the edge off
CBD may blunt some of THC's edge by interfering with the CB1 receptor, but the research uses specific doses and ratios that do not match a random store product. Treat CBD as a comfort measure, not an antidote. The FDA has not approved CBD for THC intoxication, and CBD can interact with prescription drugs, including blood thinners and some seizure medications.
Pros
- May reduce jitteriness for some people.
- Widely available and generally well tolerated.
- Gives a worried person a sense that something is being done.
Cons
- Does not remove THC or shorten the high in any reliable way.
- Can cause drowsiness, which complicates monitoring.
- Label accuracy varies, and drug interactions are real.
Use it when: the person is an adult, is not on daily prescription medication, is not vomiting, and is only mildly uncomfortable. Do not give CBD to a child who ate an edible. Call Poison Control instead.
Skip it: cold showers, coffee, and more cannabis
A cold shower is the most common bad advice. The temperature shock can cause fainting, and a slippery tub is the last place a dizzy person should be. Coffee and energy drinks raise heart rate and anxiety, which is the opposite of what a racing high needs. Smoking more to "level out" adds THC on top of THC and lengthens the episode. A cool cloth on the neck and forehead gives the same cooling effect with none of the fall risk.
Pros
- None for the cold shower or the coffee.
- A cool cloth is simple and safe.
Cons
- Fainting, slips, and falls in the bathroom.
- Caffeine worsens palpitations and panic.
- More cannabis deepens the overdose and delays recovery.
Use it when: never for the shower, coffee, or extra cannabis. Use the cool cloth instead, and keep the person seated.
When to call Poison Control or 911
Call Poison Control at 1-800-222-1222 for advice on any edible ingestion, any child who ate cannabis, and any adult who is uncomfortable but stable. Call 911 for trouble breathing, chest pain, a seizure, fainting, inability to wake the person, repeated vomiting with no fluids staying down, a high fever with rigid muscles, or confusion that gets worse instead of better. Also call for anyone who is pregnant, and for anyone who talks about self-harm.
Pros
- Trained staff can triage severity over the phone.
- Poison Control is free and confidential.
- Emergency crews can manage an airway or a racing heart on the way in.
Cons
- Hold times can be long on weekend nights.
- An emergency visit carries cost and a long wait.
- Transport can feel frightening for someone who is already panicking.
Use it when: any red flag appears, when the person is a child, or when you are unsure. One more check-in call costs nothing and settles the question.
One condition that does not resolve on its own
Repeated morning vomiting, stomach pain, and a compulsion to take very hot showers can point to cannabis hyperemesis syndrome, which is different from a single bad high. It tends to build over months of heavy use and needs a medical evaluation, not another rescue remedy. If the vomiting keeps returning after the high wears off, book a doctor's visit and be honest about cannabis use.