|AHFS/Drugs.com||International Drug Names|
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||285.38 g/mol g·mol−1|
|3D model (JSmol)|
|NY (what is this?)|
Mepyramine, also known as pyrilamine, is a first generation antihistamine, targeting the H1 receptor as an inverse agonist. It rapidly permeates the brain often causing drowsiness. It also has anticholinergic properties. However, its anticholinergic potency is negligible compared to its antihistaminergic activity; it has an H1 to muscarinic Ki ratio of 130,000 to 1, compared to a ratio of 20 to 1 for diphenhydramine.
It was patented in 1943 and came into medical use in 1949. It is used in over-the-counter combination products to treat the common cold and menstrual symptoms. It is also the active ingredient of the topical antihistamine creams Anthisan and Neoantergan sold for the treatment of insect bites, stings, and nettle rash.
- Chloropyramine (chloro instead of methoxy)
- Parsons ME, Ganellin CR (January 2006). "Histamine and its receptors". British Journal of Pharmacology. 147 Suppl 1 (S1): S127-35. doi:10.1038/sj.bjp.0706440. PMC 1760721. PMID 16402096.
- Kubo N, Shirakawa O, Kuno T, Tanaka C (March 1987). "Antimuscarinic effects of antihistamines: quantitative evaluation by receptor-binding assay". Japanese Journal of Pharmacology. 43 (3): 277–82. doi:10.1254/jjp.43.277. PMID 2884340.
- Fischer J, Ganellin CR (2006). Analogue-based Drug Discovery. John Wiley & Sons. p. 545. ISBN 9783527607495.
- "Active Ingredients for Midol Complete". Archived from the original on 2009-12-02. Retrieved 2009-12-08.
|Antihistamines for topical use|
|Anesthetics for topical use|