Green out from edibles: the short answer
A green out is a temporary cannabis overdose. THC drives it. Symptoms include nausea, vomiting, dizziness, sweating, pale skin, a fast pulse, and anxiety that can reach panic. Most healthy adults recover with rest and time. No approved drug reverses it. Deaths from cannabis alone are not documented in healthy adults.
Why edibles cause green outs more often
The liver converts delta-9-THC into 11-hydroxy-THC. That compound is more potent and reaches the brain at higher levels. Onset runs 30 to 120 minutes. Blood levels peak at 1 to 3 hours. Effects last 4 to 8 hours, and high doses run longer. Inhaled THC peaks in minutes and fades in 1 to 3 hours. A person who feels nothing at 45 minutes takes a second piece and stacks the total dose.
Green Out Symptoms From Concentrates vs Flower
Common symptoms
- Nausea and vomiting
- Dizziness or a spinning feeling
- Sweating, chills, clammy skin
- Pale or gray color
- Fast or pounding heartbeat
- Anxiety, panic, fear of dying
- Confusion and slowed speech
- Dry mouth, red eyes
- Shaking, weak legs
Timeline
Symptoms start 30 minutes to 2 hours after eating. They peak between hours 2 and 4. Most cases ease within 6 hours. Large doses can run 12 hours or more. A share of users report fatigue and fogginess the next morning.
What to do
- Stop dosing. No more cannabis. No alcohol.
- Sit or lie down in a quiet room with low light.
- Sip water. Small amounts, often.
- Eat bland food if your stomach holds it.
- Slow your breathing. Four counts in, six counts out.
- Use a distraction. A familiar show, a calm voice, a cool cloth.
- Sleep if you can. Time is the main treatment.
What does not help
Coffee, cold showers, and walking it off add strain to a fast heart. CBD may soften some THC effects in lab studies. The evidence is mixed, and CBD does not reverse a high. Black pepper and lemon peel are anecdotal. No trials back them.
When to get medical help
- Chest pain or trouble breathing
- Vomiting that will not stop
- Fainting or a fall with a head strike
- Confusion that gets worse
- Thoughts of self-harm
- Symptoms past 24 hours
- Any child who ate an edible
Call Poison Control at 1-800-222-1222. The line is free and open 24 hours. Call 911 for trouble breathing, a seizure, or loss of consciousness.
Children and edibles
Edibles look like candy, cookies, and gummies. Pediatric exposures rose in states with legal retail sales. Store cannabis in a locked box, in child-resistant packaging, out of sight. A child who ate an edible needs a call to Poison Control even with no symptoms.
How to lower risk
- Start at 2.5 mg to 5 mg THC.
- Wait 2 full hours before a second dose.
- Read total THC per package, not per piece.
- Skip alcohol and sedatives on the same night.
- Set a timer to track the delay.
- Buy from licensed shops with tested labels.
Green out vs cannabinoid hyperemesis syndrome
Cannabinoid hyperemesis syndrome (CHS) is a separate condition. It appears in long-term daily users and causes repeated vomiting episodes, belly pain, and relief from hot showers. CHS needs medical care and a stop in cannabis use. A green out follows one large dose and resolves on its own.