AntihistamineJun 10, 2026·23 min
Cyproheptadine: The Anti-Serotonin Research Tool (Complete Guide)
The complete research guide to cyproheptadine - the first-generation H1 antihistamine and 5-HT2 serotonin antagonist that the bioenergetic-research community uses as the cleanest pharmacological anti-serotonin tool. Mechanism, dose ranges, appetite and sleep effects, pairing with thyroid hormone, and the Ray Peat context.