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Clinical data | |
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Trade names | Astomin, Datosin, Gentus |
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ECHA InfoCard | 100.048.134 |
Chemical and physical data | |
Formula | C18H25N |
Molar mass | 255.405 g·mol−1 |
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Dimemorfan (INN) (or dimemorphan) (brand names Astomin, Dastosirr, Tusben), or dimemorfan phosphate (JAN), also known as 3,17-dimethylmorphinan, is an antitussive (cough suppressant) of the morphinan family that is widely used in Japan and is also marketed in Spain and Italy. [1] [2] [3] [4] It was developed by Yamanouchi Pharmaceutical (now Astellas Pharma) and introduced in Japan in 1975. [3] It was later introduced in Spain in 1981 and Japan in 1985. [5]
Adverse effects include nausea, somnolence, dry mouth, and decreased appetite. [5]
Dimemorfan is an analogue of dextromethorphan (DXM) and its active metabolite dextrorphan (DXO), and similarly to them, acts as a potent agonist of the σ1 receptor (Ki = 151 nM). [6] [7] However, unlike DXM and DXO, it does not act significantly as an NMDA receptor antagonist (Ki = 16,978 nM), and for this reason, lacks dissociative effects, thereby having reduced side effects and abuse potential in comparison. [8] [9] Similarly to DXM and DXO, dimemorfan has only relatively low affinity for the σ2 receptor (Ki = 4,421 nM). [7]