While scientists still debate the exact mechanisms in the brain that cause migraines, they've made great strides in finding new treatments to derail the migraine train. Some of these treatments are older medications originally designed for ailments other than migraines. Some medicines are used as soon as the migraine begins, while others are taken daily to help prevent migraines. This guide will help you weigh the pros and cons of a variety of treatments, to help you determine the best course of action for you and your migraines.