How does Amanita muscaria compare with CBD? They're often sold side by side as "natural calm", but they have almost nothing in common. CBD is a single, well-characterised compound from hemp, approved as a prescription drug for two rare forms of epilepsy, with known effects on the liver and on how other drugs are processed. Fly agaric is a whole mushroom with variable amounts of muscimol, ibotenic acid and muscarine, acting directly on the brain's GABA and glutamate systems. Different pathways mean different risks.
CBD works through several targets and isn't intoxicating at usual doses; at prescription doses it reduced seizures in Dravet syndrome but caused sleepiness, diarrhoea and abnormal liver tests more often than placebo (Devinsky 2017). In healthy adults on 1,500 mg a day, 44% had raised liver enzymes (Watkins 2021). Fly agaric's muscimol activates GABA-A receptors directly and can cause vomiting, confusion and, at high doses, coma (Moss 2019). They've never been studied together. If you combine them, expect added drowsiness, and start each separately.
This is a comparison of two very different products. For fly agaric's own risks, read our guide to Amanita muscaria side effects and interactions before anything else.
What Is CBD, and How Does It Work?
CBD, or cannabidiol, is one of more than a hundred cannabinoids in the cannabis plant. Unlike THC, it doesn't produce a "high" at usual doses. Its mechanism is spread over many targets, including serotonin receptors and ion channels, and it modifies how the body's own cannabinoid receptors respond rather than switching them on directly.
CBD is also a prescription medicine. A purified CBD product is approved in the US and Europe for seizures in Dravet syndrome and Lennox-Gastaut syndrome. In the Dravet trial, monthly convulsive seizures fell from a median of 12.4 to 5.9 with CBD, against 14.9 to 14.1 with placebo (Devinsky 2017).
That trial also shows CBD's side effects. Diarrhoea, vomiting, tiredness, fever, sleepiness and abnormal liver test results were all more common with CBD than with placebo. The doses were far higher than in most shop products, but the pattern is useful to know.
What Is in Amanita Muscaria, and How Does It Work?
Fly agaric contains three compounds of interest:
- Muscimol activates GABA-A receptors, the brain's main "brake". It's linked to relaxation, sleepiness and, at high doses, sedation and altered perception.
- Ibotenic acid activates glutamate receptors, the brain's main "accelerator". It's linked to nausea, confusion and agitation. Drying converts part of it into muscimol.
- Muscarine, in small amounts, can cause sweating, drooling and stomach cramps.
The balance between these varies from batch to batch, and even between parts of one cap. That's the biggest practical difference from CBD. A CBD oil can be labelled "10 mg per drop" and tested against that figure. A fly agaric product is a natural material whose potency shifts. Our article on Amanita muscaria potency factors explains why.
How Do They Compare?
| CBD | Amanita muscaria | |
|---|---|---|
| Source | Hemp or cannabis plant | Mushroom |
| Active ingredient | One defined compound | Several, in variable proportions |
| Main brain targets | Many; indirect cannabinoid effects | GABA-A (muscimol), glutamate (ibotenic acid) |
| Intoxicating? | No, at usual doses | Yes, depending on dose |
| Approved medicine? | Yes, for two rare epilepsies | No |
| Best-known risks | Liver enzymes, drug interactions, sleepiness | Vomiting, confusion, sedation, coma at high doses |
| Dosing precision | Good, if the product is tested | Poor; batches vary |
Does CBD Affect the Liver and Other Medicines?
Yes, and this is CBD's most important risk. In a phase I study, 16 healthy adults took 1,500 mg of CBD a day for about three and a half weeks. Seven of them (44%) developed raised levels of the liver enzyme ALT, and in five (31%) it rose above five times the upper limit of normal (Watkins 2021). That's a high dose, but it shows CBD can stress the liver.
CBD also affects the liver enzymes that clear many medicines. That can raise the blood levels of other drugs, including some anti-seizure medicines, blood thinners and sedatives. The US Food and Drug Administration lists liver injury and drug interactions among its main concerns about CBD products.
Fly agaric's effects on liver enzymes haven't been studied. We don't know whether CBD would change how the body handles muscimol. That's one more reason not to combine them casually.
Can You Take CBD and Amanita Muscaria Together?
They've never been studied together, so there's no tested answer. Based on what each one does, these are the likely issues:
- Added drowsiness. Sleepiness is a known CBD side effect, and muscimol is sedating. Together, they may make you drowsier than either alone.
- Added nausea. Both can upset the stomach, CBD mainly at higher doses.
- Unknown metabolism. CBD changes how the liver handles many drugs. Whether it affects muscimol is unknown.
- Harder to judge. Taking both makes it impossible to tell which one causes a side effect.
If you choose to use both, take each one on its own first so you know your response. Then, if you combine them, use low doses of each, on an evening at home, with no driving the next morning. Never add alcohol or other sedatives.
What About CBD Products Containing THC?
Be more careful. Many "full spectrum" CBD products contain small amounts of THC, and some contain more than the label says. THC is intoxicating, can cause anxiety and dizziness, and adds a third set of effects to the mix. If a product contains meaningful THC, treat it as cannabis, not as CBD, and don't combine it with fly agaric.
How Can You Check Product Quality?
The checks differ because the products differ. For CBD, the standard is a certificate of analysis from an independent lab. It should show the CBD content per serving, the THC content, and tests for pesticides, solvents and heavy metals. Studies of online CBD products have repeatedly found labels that don't match the contents, so a recent, batch-specific certificate matters.
For fly agaric, testing is less standardised. Few labs routinely measure muscimol and ibotenic acid, and results vary with methods. At minimum, a supplier should state the species, the part used, where and when it was harvested, and how it was dried. A 2024 review of online fly agaric sales found products widely marketed with unclear labelling and dosing (Leas 2024). Be wary of gummies and blends that don't list exact amounts.
For both, avoid products that promise to cure or treat disease. That claim alone tells you the seller isn't playing by the rules. Our guide on how to check Amanita muscaria quality covers the mushroom side in more detail.
Why Are They Sold Together?
Mostly because of where they're sold. CBD shops, smoke shops and "wellness" websites have added fly agaric gummies and tinctures alongside their CBD range, and both are marketed for calm and sleep. The shared shelf creates an impression that they're similar products. They aren't, and the warnings on one don't cover the other.
Which Is Better for Anxiety or Sleep?
Neither has strong evidence in healthy adults. CBD has been studied more, but results for everyday anxiety and sleep are mixed, and shop doses are often far below those used in trials. Fly agaric has almost no clinical research at all, only traditional use, user reports and poisoning data.
If anxiety or poor sleep is affecting your life, the treatments with the best evidence are psychological therapies, sleep habits and, where needed, medicine from a doctor. If you're curious about fly agaric for these uses, read our articles on Amanita and anxiety and improving sleep with Amanita, which set out what is and isn't known.
Who Should Avoid Both?
- Pregnant or breastfeeding women.
- Anyone under 18.
- People with liver disease, especially for CBD.
- People taking sedatives, opioids, anti-seizure medicines or blood thinners, without medical advice.
- People with a history of psychosis, for fly agaric.
- Anyone who needs to drive or operate machinery.
Frequently Asked Questions
Is Amanita muscaria stronger than CBD?
They aren't comparable on one scale. Fly agaric is intoxicating at higher doses and can cause poisoning. CBD isn't intoxicating at usual doses but can affect the liver and other medicines. Both carry real risks of different kinds.
Can CBD reduce Amanita nausea?
There's no evidence that it does. CBD can itself cause nausea and diarrhoea at higher doses. If fly agaric makes you nauseous, the dose was too high; lower it rather than adding another product.
Is CBD legal where Amanita isn't?
Often, yes, though rules for both vary by country and change over time. CBD is widely sold, sometimes with limits on THC content. Fly agaric's status ranges from unregulated to banned. Our guide to Amanita's legal status by country is a starting point.
Do CBD and muscimol act on the same receptors?
No. Muscimol acts directly on GABA-A receptors. CBD acts on many targets and doesn't directly activate GABA-A receptors in the way muscimol does. Both can still make you drowsy, so their effects can add up.
Should I tell my doctor if I use CBD or fly agaric?
Yes. Both can affect other medicines or medical tests, CBD especially through the liver. Your doctor can only advise you properly if they know what you're taking.
Related Articles
- Amanita Muscaria Side Effects and Interactions
- Amanita Muscaria vs GABA Supplements and Phenibut
- Ibotenic Acid vs Muscimol
- Fly Agaric vs Psilocybin Mushrooms
- Amanita Muscaria Potency Factors
Sources
- Devinsky O, Cross JH, Laux L, et al. Trial of cannabidiol for drug-resistant seizures in the Dravet syndrome. N Engl J Med. 2017;376(21):2011-2020. PubMed 28538134
- Watkins PB, Church RJ, Li J, Knappertz V. Cannabidiol and abnormal liver chemistries in healthy adults: results of a phase I clinical trial. Clin Pharmacol Ther. 2021;109(5):1224-1231. PubMed 33022751
- US Food and Drug Administration. FDA regulation of cannabis and cannabis-derived products, including cannabidiol (CBD). fda.gov
- Moss MJ, Hendrickson RG. Toxicity of muscimol and ibotenic acid containing mushrooms reported to a regional poison control center from 2002-2016. Clin Toxicol (Phila). 2019;57(2):99-103. PubMed 30073844
- Michelot D, Melendez-Howell LM. Amanita muscaria: chemistry, biology, toxicology, and ethnomycology. Mycol Res. 2003;107(2):131-146. PubMed 12747324
- Leas EC, Satybaldiyeva N, Kepner W, et al. Need for a public health response to the unregulated sales of Amanita muscaria mushrooms. Am J Prev Med. 2024;67(3):458-463. PubMed 38864780