Treatment should be stopped if the response is inadequate after two treatment cycles, that is, if there is a less than 30% reduction in headache days per month, or if the patient’s condition has changed to episodic migraine (fewer than 15 headache days per month) for 3 consecutive months.
Botox is the only botulinum toxin product that is licensed for migraine prophylaxis.
NICE guidance on botulinum toxin for chronic migraine
View Botox drug record
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