Dosing
What to Do If You Get Too High: An Hour-by-Hour Plan
You are too high right now, or someone next to you is, and you want to know how long this lasts and whether it is dangerous. An edible overshoot peaks 2 to 4 hours after you swallowed it and is mostly gone by hour 6, and almost nothing speeds that up. This is what to do while you wait, and the specific signs that mean calling for help.
The short version
The short version
- An edible overshoot peaks 2 to 4 hours after you swallow it and is largely over by hour 6. Inhaled cannabis peaks at 10 to 30 minutes and is done in 2 to 4 hours.
- Nothing meaningfully shortens it. Lie down somewhere quiet and cool, sip water, slow your breathing, and tell one person what you took and when.
- No coffee, no alcohol, no more cannabis. All 3 make an overshoot longer and worse.
- THC on its own has no confirmed fatal dose, but it sends people to emergency rooms daily, mostly for panic, a racing heart, and vomiting that will not stop.
- Call 1-800-222-1222 if a child or pet ate the product, if THC was mixed with alcohol or other drugs, or if you want a trained person on the phone. Call 911 for chest pain, trouble breathing, a seizure, or anyone who cannot be woken.
- It almost always comes down to dose or timing: a 10mg retail serving is 2 to 4 beginner doses, and a second dose taken before 2 hours have passed is the most common cause.
How long being too high actually lasts
The single most useful thing to know at minute 90 is that this ends, and roughly when. The curve is predictable even when it does not feel that way, and it depends almost entirely on how the THC got into you.
| How you took it | Peak | Main effects over | What is left after |
|---|---|---|---|
| Flower or vape | 10–30 minutes | 2–4 hours | 1–2 hours of feeling flat |
| Dab or concentrate | 5–15 minutes | 3–5 hours | Grogginess into the evening |
| Edible, 10mg | 2–4 hours | 6–8 hours | Fog the next morning |
| Edible, 25mg or more | 3–5 hours | 8–12 hours | Next morning fog, sometimes past midday |
| Tincture under the tongue | 60–90 minutes | 4–6 hours | Mild, usually clears in an hour |
An inhaled overshoot is unpleasant and short. If you took 3 hits too many, the worst of it is behind you within about 40 minutes, and sitting still through it is usually the whole treatment.
An oral overshoot is the one people search for at 11pm. THC that goes through the stomach and liver runs a much longer curve, so the honest answer is that you are looking at an evening, not an hour, and the peak arrives after the point where most people give up waiting.
Worked example
A 20mg overshoot, hour by hour:
- 8:00pm ate a 10mg gummy on an empty stomach
- 8:50pm felt nothing, ate a second 10mg gummy
- 9:20pm the first one lands, hard, and the second is still coming
- 9:40pm heart pounding, hands cold, the room feels far away
- 10:00pm to 12:30am the peak. Lights off, lying on one side, water within reach, roommate told
- 1:30am clearly declining. Sleep usually arrives around here
- 8:00am foggy, slightly nauseous, a dull headache
- 12:00pm back to normal
What to do in the next 20 minutes
Everything on this list is about lowering stimulation and making the next few hours survivable. None of it removes THC from your body, and that is fine, because your body is already doing that part.
- Stop consuming. No more inhalations, no more of the gummy, nothing "to take the edge off".
- Get horizontal, somewhere cool and dim. Standing up makes dizziness and the pounding heart worse, and heat makes nausea worse.
- Tell one person. Say exactly what you took, how much, and when. This matters far more than it feels like it does, because it is the information anyone helping you will need.
- Slow your breathing on purpose. 4 seconds in, 6 seconds out, for 2 minutes. It genuinely lowers heart rate, and the racing heart is what most people are actually frightened of.
- Put a bucket and a glass of water next to you. Nausea arrives fast and getting up for either one is when people fall.
- Turn off anything loud or fast. Music with no lyrics is better than a film. Doomscrolling your symptoms makes the panic worse.
- Do not drive, and do not let anyone talk you into a walk to clear your head. Both go wrong at the peak.
What helps and what does nothing
Time is the only reliable fix and sleep is the fastest version of it. Everything else on this list either makes the wait easier or does nothing at all, and it is worth knowing which is which before you go looking for a cure.
| Thing | Does it help? |
|---|---|
| Lying down in a dark, quiet room | Yes. The most effective thing available to you |
| Slow, deliberate breathing | Yes. Directly lowers the heart rate driving the panic |
| Sipping water | Yes for dry mouth and nausea. It does not flush THC out |
| Plain food: toast, crackers, rice | Mildly. Settles the stomach, does not reduce the high |
| Sleep | Yes. The fastest way through the remaining hours |
| A cool shower or a cold cloth | Briefly. Do it sitting down, fainting is a real risk |
| CBD | Unclear. Evidence is mixed and a CBD product with THC in it makes things worse |
| Black pepper, lemon rind | No evidence. Harmless, but they are not doing anything |
| Coffee or energy drinks | No. Adds to the racing heart and the anxiety |
| Alcohol | No. Raises THC blood levels and adds vomiting |
| More cannabis | No. This is how a bad hour becomes a bad night |
| Making yourself vomit | No. Pointless once it is absorbed, and it risks choking |
The folk remedies persist because everyone who tried one also waited an hour, and the hour is what worked. If chewing a peppercorn makes you feel like you are doing something useful, it will not hurt you, but do not build a plan around it.
Racing heart, nausea, and paranoia
Three symptoms account for nearly every frightening cannabis experience, and each one has a shape worth knowing. THC raises heart rate for roughly an hour after it takes hold, which is normal, uncomfortable, and the single biggest trigger for panic in people who have never felt it before.
Paranoia and the sense that something is badly wrong feed on themselves. The loop is: notice a symptom, get frightened, adrenaline makes the symptom worse, repeat. Naming it out loud, even alone, breaks it more often than you would expect, because it converts an emergency into a known thing with an end time.
Nausea and vomiting are the symptoms that most often end in an emergency room. Vomiting once or twice at the peak is common. Repeated vomiting that will not stop is not something to wait out, and in a heavy daily user with a history of cyclic vomiting and stomach pain it can be cannabinoid hyperemesis syndrome, which the CDC describes as needing medical attention rather than a hot shower.
When to call 1-800-222-1222 or 911
Too much THC is not known to be fatal on its own, and there is no confirmed lethal dose in humans. That is the honest reassurance, and it stops there: people are treated in emergency departments for cannabis poisoning every day, most often after edibles, and NIDA describes severe reactions that include panic, hallucination, and psychosis.
Call the Poison Help line at 1-800-222-1222 if a child or a pet ate the product, if the person did not know they were consuming THC, if THC was mixed with alcohol, opioids, or other drugs, or if you simply want a trained person on the phone. It is free, staffed 24 hours, and it is not law enforcement.
Call 911 instead for chest pain, trouble breathing, fainting or unresponsiveness, a seizure, vomiting that will not stop after several hours, or any suspicion that the product contained something other than cannabis. A child who has eaten an edible is a 911 or Poison Control call every time, not a wait-and-see.
Worked example
What to say when you call Poison Help. Have this ready before you dial:
- Who: "My roommate, 26, no medical conditions, not on any medication."
- What: "A THC gummy from a licensed shop. The package says 10mg per piece."
- How much: "Two pieces, so 20mg."
- When: "About 90 minutes ago, on an empty stomach."
- Symptoms: "Heart rate around 120, shaking, vomited twice, very frightened but talking normally."
- Also taken: "Two beers before the gummies."
The call takes 5 minutes and they will tell you plainly whether to sit tight or go in.
If it is someone else who took too much
Your job is to be calm, boring, and present. Say the same 3 things on a loop: you took X milligrams, it peaks around a certain time, it wears off and you are not dying. Repetition works because short-term memory is one of the first things THC takes.
Keep them lying on their side if they are sleepy or nauseous, keep the room cool, and stay in the room. Do not leave a very intoxicated person alone to sleep it off if they have been vomiting or have had alcohol as well.
A child or a pet is a different situation entirely and there is no waiting period. Children absorb adult doses relative to their body size, edibles look exactly like candy, and the correct move is an immediate call with the package in your hand so you can read the milligram number off the panel.
The next morning, and when you can drive again
The residue of a large edible is real: fog, slow reactions, a dull headache, and a general flatness that lifts by midday for most people. Eat, drink water, and write off anything that needs sharp judgement.
Impairment lasts longer than the part you notice, which is the whole problem with driving after cannabis. Every state treats driving under the influence as a DUI, and there is no roadside equivalent of a blood alcohol number that will help you argue otherwise.
Numbers
The clock after a heavy oral dose:
- 0 to 2 hours: the onset window, and where the redosing mistake happens
- 2 to 4 hours: the peak
- 6 to 8 hours: main effects finished
- 8 hours minimum: before driving, and after a dose that felt strong, wait until the next morning
- Next morning: fog and slow reactions are normal, usually clear by midday
- 1 to 2 nights: sleep can stay disrupted after a large dose
Why it happened, and the dose that prevents a repeat
Almost every overshoot traces to one of two things: a dose sized for someone else, or a second dose taken too early. The fix is a ladder rather than a single number, and 10mg is nowhere near the bottom of it.
| Dose | What it does | Who it suits |
|---|---|---|
| 2.5mg | Slight mood and body shift, still fully functional | A first oral dose, or daytime use |
| 5mg | Clearly psychoactive, warm, some time distortion | A confident first dose, or a second session |
| 10mg | The standard retail serving. Strong without tolerance | Occasional consumers with sessions behind them |
| 20mg and up | Heavy sedation, real impairment | Daily consumers and medical patients |
10mg is what a regulated package calls one serving, which makes it a legal unit rather than a recommendation. Every regulated package prints a per-piece milligram number on the panel, so a 100mg bag of 10 gummies from a licensed Denver dispensary is 10mg a piece and a quarter of one piece is a real starting dose.
The 2-hour rule is the other half. Wait a full 2 hours before taking any more of anything you swallowed, because oral onset runs 30 minutes to 3 hours and the gummy you think did nothing is usually still on its way.
Swallowed THC also hits harder than the same milligrams inhaled, and the reason is your liver. It converts THC into 11-hydroxy-THC before the dose reaches general circulation, and that compound crosses into the brain more readily than THC itself, which is why 10mg eaten and 10mg inhaled are not the same event.
The rest of the variance is individual. Tolerance is the largest factor by a distance, an empty stomach speeds onset while a fatty meal slows it and can increase how much you absorb, CBD in the same product tends to blunt the edge, and alcohol or sedatives stack with THC and make overshoots worse. Body weight matters far less than people assume, and there is no dependable milligram-per-kilogram rule for cannabis.
Tolerance also builds within days of daily use and resets over a break of 2 to 4 weeks, which cuts both ways. The person most likely to overshoot next month is the one coming back from a tolerance break and reaching for the dose that used to be comfortable.
At the counter
Say this next time, in these words:
- "What is the lowest per-piece edible in the case?" The 2.5mg and 5mg pieces exist in most Detroit dispensaries and they rarely sit on the front shelf.
- "Is it scored, or individually molded?" A 100mg bar you can snap into 10 marked squares beats a 100mg cookie you have to guess at.
- "Anything 1:1 with CBD?" A 5mg THC piece with 5mg CBD alongside it is the gentlest thing in most cases.
- "How fast is it?" Nano-emulsified drinks and fast-acting chews land in 10 to 30 minutes, which makes the 2-hour wait far easier to hold.
Common questions
What should I do if I take too much THC?
Lie down somewhere cool and quiet, sip water, slow your breathing, and tell someone what you took and when. Avoid coffee, alcohol, and any more cannabis, all of which make it worse. An oral overshoot peaks 2 to 4 hours in and is mostly gone by hour 6, and sleep is the fastest way through it.
How long does a THC edible last?
6 to 8 hours for a 10mg dose, with the peak at 2 to 4 hours and residual fog into the next morning. A 25mg dose can run 8 to 12 hours. Higher doses last longer, not just stronger, which is the part people fail to plan for.
How long do edibles take to kick in?
30 minutes to 3 hours. A fatty meal beforehand pushes onset toward the long end, an empty stomach toward the short end, and fast-acting or nano-emulsified products land in 10 to 30 minutes and say so on the label.
Why do edibles feel stronger than smoking the same amount?
Because your liver changes the molecule. Swallowed THC is converted into 11-hydroxy-THC before it reaches general circulation, and that compound is more potent and crosses into the brain more easily than the THC you inhale. Same milligram figure, different drug in practice.
How long should I wait before taking a second dose?
A full 2 hours for anything swallowed, and 15 minutes between inhalations. Redosing at the 45-minute mark is the single most common way people end up too high, because the first dose has not arrived yet and both then land together.
Is 10mg of THC too much for a beginner?
Yes, for a first oral dose. 10mg is the standard regulated serving, sized for people who already consume regularly, and it reliably overwhelms anyone without tolerance. Treat a 10mg gummy as 2 to 4 doses rather than one.