Relpax is a prescription medication that belongs to a class of drugs known as triptans, which are specifically used to treat migraine headaches. Its active ingredient, eletriptan hydrobromide, works by narrowing the blood vessels around the brain, thereby relieving the headache and other symptoms associated with migraines, such as nausea, vomiting, and sensitivity to light and sound. Relpax is taken orally, usually at the onset of migraine symptoms, to help reduce the duration and intensity of the migraine attack. It is not intended for the prophylactic treatment of migraines or for the treatment of cluster headaches. As with any medication, it is important to use Relpax under the guidance of a healthcare provider, as it may not be suitable for everyone and could interact with other medications.