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Periactin

Periactin Periactin is a brand name for cyproheptadine hydrochloride, a synthetic medication with antihistamine and anti-serotonin effects.

Periactin is a brand name for cyproheptadine hydrochloride, a synthetic medication with antihistamine and anti-serotonin effects. It also has anticholinergic and sedating properties and has been shown to increase appetite and weight gain.

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Sources

Drafting source: NCI Thesaurus. Flat export snapshot 2026-10-18. “Cyproheptadine Hydrochloride” (C28949).
CC-BY-4.0 · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: b27ca135beadd46c343d248135377c5077c5447fe11b93803bfab866b84fcd38

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “Periactin.” Development preview.

Version 1 · SHA-256: 971506830dcbb662d9e91baafad38945c77b4d1bba5a6fdc9cbd86f6484e0b22

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