A green out is acute THC overconsumption, and the nausea it causes usually eases at home within one to three hours after smoking or vaping. The core steps are simple: stop using cannabis, lie on your side in a cool room, sip water or an electrolyte drink, and try ginger or a bland carbohydrate. Edible overdoses run longer, often six to twelve hours. Call 911 for chest pain, a racing heartbeat, seizures, or fainting.
Are Green Outs Dangerous? Symptoms and When to Get Help
What to Have Ready
- Water and an electrolyte drink
- Ginger chews, ginger tea, or ginger ale made with real ginger
- A cool, damp cloth
- Plain crackers, toast, or white rice
- A quiet room with dim light
Step-by-Step Home Treatment
- Stop all cannabis use. Put down the vape, joint, or edible and set a timer so you do not lose track of time.
- Lie down on your side, not on your back. This keeps your airway clear if you vomit.
- Sip water, a sports drink, or a oral rehydration solution. Take small swallows every few minutes instead of a full glass at once.
- Try ginger. A cup of ginger tea, a ginger chew, or a small glass of real ginger ale can calm the stomach. Ginger has a long history as an anti-nausea remedy.
- Place a cool, damp cloth on your neck and wrists. A fan or an open window adds to the cooling effect.
- Eat a small amount of bland carbohydrate if you can keep it down. Crackers, dry toast, or plain rice absorb stomach acid and settle the gut.
- Breathe slowly and count. Inhale for four counts, hold for four, exhale for six. Slow breathing lowers the panic that often rides along with nausea.
- Wait it out. Inhaled THC peaks within 10 to 30 minutes and fades over one to three hours. Edible THC is processed by the liver and can last six to twelve hours, so plan on a longer ride after an edible.
What Not to Do
- Do not use more cannabis. More THC will not cancel the nausea, it will extend it.
- Do not drink alcohol. It adds to dehydration and slows the clearance of THC.
- Do not force yourself to vomit. It raises the risk of choking and does not remove much THC from the body.
- Do not drink coffee or energy drinks. Caffeine raises heart rate and worsens the jittery feeling.
- Do not eat a large meal. A heavy meal on an upset stomach often comes right back up.
- Do not drive or operate equipment until you feel normal again.
How Long a Green Out Lasts
Smoked and vaped THC clears fast. Most people feel human again in one to three hours, with a lingering fog for a few more. Edibles take a different path. The liver converts THC into 11-hydroxy-THC, a compound that is stronger and lasts longer, so nausea and dizziness can stretch past eight hours. High-dose concentrates and tinctures fall somewhere in between. Sleep is the fastest exit. If you can rest, do it.
How to Stop Greening Out on Weed: Steps, Timeline, and 911 Signs
Repeated Nausea May Be Cannabinoid Hyperemesis Syndrome
If you use cannabis most days and get bouts of morning nausea, belly pain, and vomiting that stop when you take a hot shower, you may have cannabinoid hyperemesis syndrome. Hot showers feel better for an hour and then the cycle returns. The only proven fix is to stop cannabis. This condition needs a doctor, not home care, because repeated vomiting drains fluids and electrolytes.
When to Get Medical Help
- Vomiting that lasts more than a few hours, or the inability to keep any fluid down
- Chest pain, a racing or irregular heartbeat, or shortness of breath
- Confusion, fainting, seizures, or a seizure-like episode
- Severe or worsening abdominal pain
- Any suspected edible ingestion by a child, or an accidental high dose in an adult
For a child who ate an edible, or for anyone with severe symptoms, call Poison Control or 911. Bring the package if you can. It tells the responders the dose and the product.