Rizatriptan is what

Rizatriptan is what? For many people this is a strange object, and here's the introduction to it:

White powder or white crystal at room temperature. Developed by Merck, listed in the United States in 1998. The firm QuTan triptan-based drugs such as receptor selectivity, optional contraction cerebral vasculature, external perivascular effect is very weak, so fewer side effects, is a powerful drug for the treatment of migraine, for migraine drug therapy has brought the revolutionary progress. The study showed that the combined use of lizattritan and trimebutin was more useful than single use, and the combination did not increase the incidence of adverse reactions and the recurrence rate of pain