BTX/A is an effective treatment for chronic migraine — defined as 15 or more migraine days per month, each lasting at least 4 hours. The treatment follows the PREEMPT protocol, involving 31 small injections across 7 specific muscle areas of the head and neck.

🕒 Onset:
– Initial relief: 4 – 10 days
– Full effect: 6 – 12 weeks

⏳ Longevity: Typically 10–12 weeks

For consistent prevention, injections are recommended every 12 weeks.