Rizatriptan is used to ease the symptoms of migraine headaches. It works by releasing a chemical called serotonin, which causes the blood vessels around your brain to contract (narrow). This reverses the dilating (widening) of blood vessels that are believed to be part of the headache process. Rizatriptan belongs to a group of medicines called triptans. Rizatriptan only works when a migraine attack has already begun. It will not prevent a migraine. Do not take it before your headache begins, or during the aura phase, as it may be less effective. Read more about migraine headaches.
In New Zealand rizatriptan is available as tablets (10 mg). The tablet dissolves when you place it on your tongue. It may be useful if you find drinking water difficult during a migraine or you cannot swallow tablets. It is not useful if you are vomiting.