In the cannabis community, the term “greening out” refers to the unpleasant and overwhelming physical and mental effects that can occur when someone consumes too much cannabis—especially THC. It’s a term every new or even experienced user should understand, because while cannabis is generally safe, overconsumption can lead to a temporarily uncomfortable situation. But don’t panic—greening out is not life-threatening, and there are simple ways to manage it.
What Is “Greening Out”?
Greening out is essentially a cannabis-induced overload. It can happen when someone consumes more THC than their body can handle—through smoking, vaping, or consuming edibles. The experience varies from person to person, but common symptoms include:
- Dizziness or lightheadedness
- Nausea or vomiting
- Sweating and chills
- Anxiety or panic attacks
- Rapid heart rate
- Disorientation or paranoia
In severe cases, a person may feel like they’re having a medical emergency. According to the National Institute on Drug Abuse (NIDA), high doses of THC can cause acute psychotic reactions in some users, especially those who are inexperienced, have underlying mental health conditions, or consume cannabis with very high potency.
Why Does It Happen?
Cannabis works by interacting with your body’s endocannabinoid system, which regulates mood, appetite, sleep, and more. THC (tetrahydrocannabinol), the psychoactive compound in cannabis, binds to receptors in the brain and central nervous system. In moderation, it can bring euphoria and relaxation. But in high doses, especially when taken quickly or without tolerance, it can overwhelm the system.
Edibles, in particular, are a common cause of greening out. They take longer to kick in (up to 2 hours), so some users make the mistake of taking more too soon, thinking the first dose didn’t work. Once the full effects hit, it’s too late to reverse the dose.
What Should You Do If You Green Out?
If you or someone else is greening out, the most important thing to remember is this: you’re going to be okay. Here are steps you can take:
- Stay Calm
Remind yourself—or the person greening out—that the effects are temporary. Breathing slowly and steadily can help manage anxiety. - Find a Safe, Comfortable Spot
Lie down or sit somewhere quiet. A cool, dark room can help reduce sensory overload. - Hydrate
Sip water slowly. This can help combat dry mouth and may ease nausea. - Use Black Pepper
Believe it or not, sniffing or chewing a few black peppercorns can help counteract THC-induced anxiety. It’s an old trick backed by some science: black pepper contains beta-caryophyllene, which can calm the effects of THC. - Distract Yourself
Watching a calming video, listening to soothing music, or having a trusted friend talk you through it can make the experience more bearable. - Avoid Stimulants
Skip the caffeine and energy drinks, as they can increase heart rate and worsen anxiety.
If symptoms persist for several hours or the person is at risk (due to other health issues or medications), it’s wise to seek medical attention. Cannabis can’t kill you, but a doctor can ensure there’s nothing more serious going on.
Prevention Is Key
To avoid greening out, start low and go slow, especially with edibles or concentrates. Know your tolerance, read product labels, and wait at least two hours before taking more.
Greening out might feel scary, but it’s not uncommon—and it’s preventable. With some knowledge and preparation, you can enjoy cannabis responsibly and avoid the green zone entirely.