A 32-year-old mother of two young children presents with mig…

A 32-year-old mother of two young children presents with migraine headaches that the patient reports originating in her early 20s. The patient has been using a nonsteroidal antiinflammatory drug (NSAID) without any relief and is asking to go back on a previous prophylaxis therapy but cannot remember the name of the drug. What is the most likely medication that was prescribed in the past?