Interested in treating your Migraines and Hyperhidrosis? Botox is FDA-approved for chronic migraines, which means headaches on 15 or more days a month. Botox is a form of botulinum toxin, a neurotoxin produced by the bacteria that causes botulism. When the Botox is purified and used in tiny doses in specific areas, it temporarily reduces muscle contractions for approximately 3 months.