Medication overuse headache.

Medication overuse headache may complicate any type of headache and occurs in young people, adults, and even elderly patients. Overuse of acute medications may change intermittent or self-limited headaches into chronic daily headache. Migraineurs seem particularly prone to analgesic rebound headache/ transformed migraine/chronic migraine. Prophylactic therapies are often ineffective in the setting of medication overuse. Recognition of this condition allows appropriate clinical intervention that includes cessation of the offending medications.