Naratriptan hydrochloride

개요Naramig was launched in Germany, Sweden and the UK for use in migraine. It is chemically available via a number of related synthetic routes all having about three steps starting from 5-bromoindole. It is a new serotonin 5-HT1B/1D receptor antagonist with modest affinity for 5-HT1a, and very weak affinity for 5-HT3 receptors. It has little or no affinity for a wide range of non-serotonin receptors including a- and padrenoceptors, dopamine, neurokinin NK1, and opiate receptors. It mediates vasoconstriction in cerebral vasculature (extra cerebral intracranial vessels), reduces neurogenic inflammation, and inhibits responses mediated by the trigeminal nerves. It has a 6- and 3-fold greater affinity for 5-HT1B, and 5-HT1D, receptors, respectively, than sumatriptan which translates to a 2-3 fold increase in potency. The reoccurance of headache was less compared to sumatriptan, zolmitriptan and rizatriptan. Naramig had no clinical effects on blood pressure or heart rate, had a long duration of action with very good tolerability, and has high oral bioavailability.

용도Naratriptan Hydrochloride is a triptan drug and is used for the treatment of migraine headaches