Which medication class is often used for preventative treatment of migraines?

Beta-blockers are commonly used for the preventative treatment of migraines due to their ability to reduce the frequency and severity of migraine attacks. They work by blocking the effects of adrenaline on the cardiovascular system, which can help in regulating blood flow and reducing the likelihood of migraines. Additionally, beta-blockers have been shown in clinical studies to be effective in decreasing the frequency of migraine headaches, making them a first-line option in migraine prevention. They are thought to influence migraine pathophysiology by stabilizing vascular tone and reducing excitability in the central nervous system.

In contrast, oral antihistamines primarily address allergy symptoms and are not specifically effective for migraine prevention. Decongestants are used to relieve nasal congestion and do not have a role in migraine management. Topical corticosteroids primarily treat inflammatory conditions and are not indicated for migraines. Hence, the effectiveness and established use of beta-blockers in migraine prophylaxis make this medication class the correct choice.