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Knowing what a Cannabis overdose looks like could help you avoid complications and potential danger. Learn about your addiction treatment options.

As the popularity of cannabis products rises, it’s worth understanding potential adverse effects, even with natural remedies like CBD. “Greening out” refers to the uncomfortable experience of consuming too much THC, leading to symptoms such as dizziness, nausea, and anxiety.
TL;DR: Greening out happens when you consume too much THC — not CBD. Symptoms like dizziness, nausea, and anxiety are real but temporary. To avoid it, start low and go slow, eat beforehand, and stay hydrated. At Mellow, all our products are clearly dosed so you can stay in control.
Though often mild, these reactions can be alarming, particularly for new cannabis users. Understanding the causes and recognizing the signs of greening out can help individuals make informed decisions and find their way through their cannabis journey safely.
By looking at preventative strategies and practical tips for managing greening out, consumers can enjoy the therapeutic benefits of cannabis products while minimizing potential risks.
At Buy Mellow, we believe in responsible consumption and providing high-quality, lab-tested CBD products to support your well-being.
New to cannabis or a seasoned user, our range of CBD oils, gummies, relief sticks, and more can offer a safe, reliable solution for your health needs.
“Greening out” is often referred to as a cannabis overdose. It is when a person feels ill after smoking weed. Common symptoms include turning pale, sweating, getting dizzy or having “the spins,” and sometimes vomiting. In more severe cases, a person might experience a panic attack.
Even though it’s new cannabis users who generally experience greening out, it rarely occurs in general. When it happens, symptoms are apparent to the person experiencing it or an observer.
Vaping, smoking, or dabbing cannabis results in a faster uptake of cannabis, leading to a quicker onset of effects.
Symptoms of greening out include:
Sound familiar? If you’ve ever had one of these episodes, you’re not alone — and knowing what’s happening makes it a lot less scary.
The duration of adverse effects will vary the same way a cannabis high does. Usually, you’ll experience greening out for the entirety of your high.
A cannabis high lasts anywhere from one to 24 hours. Factors such as how much cannabis you consumed, the level of THC in the product, your body weight, tolerance level, whether you ate before, and your metabolism will affect the high length. Those who consume high amounts of THC (especially via edibles) may experience longer-lasting effects, sometimes up to 24 hours.
If you have a pre-existing heart condition, avoid THC. The compound may lead to thinning of blood vessels, leading to an increased heart rate and a drop in blood pressure, causing a potentially serious medical emergency.
Another side effect common with greening out is hyperventilation. As your heart rate increases, thanks to high doses of THC, your body struggles to provide enough oxygen, making breathing hard.
If you experience panic and feel that you are out of touch with reality, a friend can help you get through this situation. A friendly face can reassure you that things will soon return to normal.
Removing yourself from an overstimulating environment is always best if you’re greening out: find a quiet place to lie down and ride the wave out.
Though greening out doesn’t lead to health risks unless you have a pre-existing condition, it can cause those who’ve experienced it to associate cannabis with adverse effects. This tends to be problematic if you take marijuana to manage a medical condition.
The best way to prevent greening out is to build up your tolerance regarding THC dosage. Start with small doses and observe how your body reacts. Eventually, this will give you an idea of what you can handle.
The information in this article is for educational purposes only and is not intended as medical advice. Always consult with a healthcare professional before starting any new supplement, including CBD products.
Sources & Further Reading

Oils and Tinctures

Oils and Tinctures

Oils and Tinctures

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