A nurse is teaching a client who has a prescription for sumatriptan to treat migraines. Which of the following information should the nurse include in the teaching?

Choice A reason: Starting sumatriptan at the onset of migraine pain is correct because the medication works best when taken early in the migraine attack. Sumatriptan is a serotonin receptor agonist that causes vasoconstriction of cranial blood vessels and reduces neurogenic inflammation. Early administration maximizes effectiveness and prevents progression of the migraine. Choice B reason: Elevating the head while lying down to prevent hypotension is incorrect. Sumatriptan does not typically cause hypotension; instead, it can cause vasoconstriction and increase blood pressure. Elevating the head is not a recommended teaching point for this medication. Choice C reason: Eating a meal before taking sumatriptan is unnecessary. The medication can be taken with or without food, and food intake does not affect its absorption or effectiveness. Choice D reason: Expecting peak analgesia at 6 hr is incorrect. Sumatriptan has a rapid onset of action, with peak effects occurring within 1 to 2 hr. Waiting 6 hr would delay relief and misinform the client.