Microdosing While on Antidepressants: What You Need to Know

## The Core Issue: Pharmacological Blunting SSRIs work by blocking serotonin reuptake. Psilocybin works by activating 5-HT2A serotonin receptors. When you're on an SSRI, those receptors become downregulated — there are fewer of them, and they're less sensitive. Psilocybin has less to bind to, and its effects are reduced or eliminated. This is **pharmacological blunting**, and it's the most common reason people on antidepressants report that microdosing "doesn't work." ## What the Research Shows A 2021 survey study of 1,800 microdosers found that people on SSRIs reported significantly lower benefits from microdosing compared to people not on SSRIs. The effect was dose-dependent — higher SSRI doses produced more blunting. There is no evidence of dangerous interactions between psilocybin and SSRIs at microdosing doses. ## Your Options 1. **Try anyway** — some people on SSRIs do report benefits, particularly at higher microdoses (0.3–0.5g). The blunting effect varies significantly between individuals. 2. **Taper off SSRIs first** — only under physician supervision. SSRIs have discontinuation syndrome and stopping abruptly can cause significant symptoms. 3. **Use the protocol as a bridge** — some people use microdosing to support the SSRI taper process. ## Important Never stop antidepressants without medical supervision. Always taper under physician guidance. [See the full protocol →](/research-checkout) *This article is for informational purposes only. Never stop or reduce psychiatric medications without consulting your physician.*