What is a suitable abortive therapy for a patient with migraine headaches?

For a patient experiencing migraine headaches, an appropriate abortive therapy would be Sumatriptan (Imitrex) 6 mg IM. Sumatriptan is a triptan medication specifically designed to treat acute migraine attacks. It works by stimulating serotonin receptors in the brain, which helps to constrict blood vessels that have dilated during a migraine and reduces inflammation and pain signaling.

Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID) that can provide pain relief, but it is not considered a first-line abortive treatment specifically targeted at migraines. Amitriptyline is an antidepressant often used as a preventive treatment for migraines rather than for abortive therapy. Ergotamine is also an option for abortive therapy, but it has more potential side effects and is generally less preferred than triptans in acute migraine cases.

Overall, the effectiveness of Sumatriptan in rapidly relieving migraine symptoms makes it the preferable choice for abortive treatment in this context.