Non-steroidal Anti-inflammatory Drugs Alone or With a Triptan and Reports of Transition From Episodic to Chronic Migraine

Participants who self-report that they have treated headaches with any drug in the non-steroidal anti-inflammatory drug (NSAID) class

Participants who self-report that they have treated headaches with any drug in the NSAID class and any drug in the triptan class including naratriptan, sumatriptan, rizatriptan, frovatriptan, almotriptan, eletriptan, and zolmitriptan