Last updated: 8 October 2026. Informational only, not medical advice.
CBD and MAOIs (monoamine oxidase inhibitors), an older class of antidepressant medication, carry a theoretical serotonin-related concern similar to, but generally considered more serious than, the SSRI interaction discussed elsewhere on this site, given MAOIs’ broader effect on neurotransmitter metabolism and their well-known sensitivity to many other substances and foods.
Why MAOIs are a distinct, higher-caution category
| Factor | Detail |
|---|---|
| Mechanism | Inhibits monoamine oxidase, an enzyme that breaks down serotonin, dopamine, and norepinephrine |
| Known sensitivity | Well-documented interactions with many foods (tyramine-containing) and medications |
| CBD’s relevance | CBD’s effect on serotonin receptors and liver enzymes adds a plausible additional interaction layer |
| Current usage | Less commonly prescribed than newer antidepressants, typically reserved for treatment-resistant depression |
Why this deserves more caution than the SSRI discussion elsewhere on this site
MAOIs are already known for a broad and serious interaction profile, famously including dietary restrictions around tyramine-containing foods (aged cheeses, cured meats, certain fermented products) due to risk of dangerous blood pressure spikes. This existing sensitivity profile is part of why any new substance, including CBD, deserves particular caution rather than assuming the SSRI-level guidance applies equally here. MAOIs are less commonly prescribed today, generally reserved for depression that hasn’t responded to other treatments, and patients on them are typically already very familiar with strict interaction awareness given their medication’s known profile.
Practical guidance
- If you’re on an MAOI, this is a conversation for your prescribing psychiatrist specifically, given both the seriousness of treatment-resistant depression and MAOIs’ known broad interaction sensitivity
- Don’t assume general CBD guidance for other antidepressants applies equally here
- Never start CBD without your psychiatrist’s direct knowledge if you’re on an MAOI
- Continue following your existing dietary and medication restrictions regardless of any CBD-related discussion
Recognizing serotonin syndrome, relevant here as elsewhere
As covered in our discussion of CBD and SSRIs, serotonin syndrome is a rare but serious risk when combining serotonergic substances. Given MAOIs’ particularly broad effect on neurotransmitter metabolism, this risk deserves even more careful attention here. Symptoms include agitation, rapid heart rate, sweating, tremor, and in severe cases, high fever or seizures, warranting emergency medical attention.
Who this applies to
- Anyone currently on an MAOI. This is a smaller population than SSRI users, given how MAOIs are typically reserved for treatment-resistant cases, but the caution here is proportionally higher.
- Recently stopped an MAOI. These medications can require a washout period before starting other treatments; discuss timing with your psychiatrist before introducing CBD as well.
Frequently asked questions
Can I take CBD if I’m on an MAOI?
This requires direct discussion with your psychiatrist given MAOIs’ known broad interaction sensitivity; don’t assume general antidepressant guidance applies equally here.
Why are MAOIs different from SSRIs for this purpose?
MAOIs have a broader, more well-documented interaction profile with many substances and foods, reflecting their different and more extensive mechanism of action on neurotransmitter metabolism.
Is this a common concern given how few people take MAOIs today?
Less common in terms of population size, since MAOIs are less frequently prescribed, but proportionally more important given the specific individuals on this medication class often have treatment-resistant depression and complex medication histories.
