Migraines

Preventive treatment reported to nearly halve migraine days has existed since 2018. What differs by country is not the drug but the conditions attached to it. In 2024 the American Headache Society dropped the requirement to fail other medications first. Japan's insurance opens after one failed drug, with no time limit. Korea requires three failed drugs at maximum doses over six months, caps coverage at one year, and reimburses only 15 percent of actual use. Same molecule, same results, different fine print.