Migraine affects 3 billion people globally — but is still confused with regular headaches. This 2026 guide covers the 4 migraine phases, a full 3-headache-type comparison table, medication-overuse headache warning, migraine triggers table, triptans, newest CGRP biologics, Botox for chronic migraine, and the key differences between episodic and chronic migraine.

More than 90% of all US prescriptions are filled with generic drugs — yet millions of Americans still wonder: is the generic really the same? Is it safe? This complete 2026 guide answers that question definitively: what the FDA actually checks before approving a generic, why the real average blood-level difference is less than 4%, the one category of drugs where extra caution is warranted, the 7 red flags of fake generics online, why Indian WHO-GMP manufacturers supply the US