Stop using cannabis. Sit or lie down in a quiet room with one other person present. Say out loud what happened and when. Most panic episodes after smoking or vaping peak in 15 to 30 minutes and fade in 1 to 3 hours. Edible episodes run longer, from 6 to 12 hours.
What to do in the first 30 minutes
- Stop inhaling or eating cannabis. Put the product in another room.
- Move to a calm space. Low light, low noise, one person talking.
- Breathe on a count: inhale 4 seconds, hold 2, exhale 6. Repeat for 5 minutes. Paced breathing lowers heart rate and panic symptoms in clinical studies of panic disorder.
- Drink 8 to 16 ounces of water.
- Eat a small snack if you skipped a meal. Low blood sugar can look like panic.
- Skip caffeine, alcohol, and energy drinks. They raise heart rate and stretch the episode.
- Repeat one fact: "This is a drug effect. It is temporary. THC is causing the fast heartbeat."
What has evidence and what does not
Paced breathing, cooling, and calm reassurance have support in panic research. Chewing black pepper, smelling lemon or pine, and taking CBD for a cannabis panic episode are anecdotal. Clinical trials on CBD for cannabis-induced anxiety are small and results are mixed. Benzodiazepines reduce panic but need a clinician. Do not take another person's prescription.
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How long it lasts
- Smoked or vaped: onset 1 to 10 minutes, peak 15 to 30 minutes, total 1 to 3 hours.
- Oral: onset 30 to 120 minutes, peak 2 to 4 hours, total 6 to 12 hours.
- Redosing while you wait makes the episode stronger and longer.
Call 911 or Poison Help
- Chest pain, pressure, or pain in the arm or jaw
- Trouble breathing or blue lips
- Fainting, seizure, or confusion that does not clear
- Vomiting for more than 1 hour, or vomiting with belly pain
- Talk of self-harm, or speech that does not make sense
Poison Help: 1-800-222-1222. Crisis line: call or text 988.
Lower the risk next time
- Track milligrams of THC per dose. For edibles, 2.5 to 5 mg is a common starting range.
- Wait 2 hours before taking more of an edible.
- Avoid mixing with alcohol.
- Sleep loss, stress, and a history of panic disorder raise the odds of a repeat.
Unknown: no large trial tests first aid steps for cannabis panic on its own. The steps above follow general panic and poisoning guidance.