What is the primary pharmacologic approach for preventing chronic migraine?

Prepare for the Pharmacology IV – Headache Therapeutics Test. Review the therapeutic approaches, tackle multiple-choice questions with explanations, and boost your test-taking confidence. Ace your exam with precision!

Preventing chronic migraine relies on regular preventive pharmacotherapy rather than relying solely on treating attacks as they occur. Chronic migraine involves many headache days per month, so the goal of prevention is to lower the frequency, severity, and disabling impact of headaches over time. A range of preventive options has proven benefit, including beta-blockers (for example, propranolol), certain anticonvulsants (such as topiramate), antidepressants (like amitriptyline or venlafaxine), CGRP-directed monoclonal antibodies, and onabotulinumtoxinA injections. These are started at a therapeutic dose and continued for several months to assess effectiveness, with adjustments as needed. In contrast, short-term analgesics used during attacks help only with immediate relief and do not reduce future attack frequency; overreliance on them can also lead to medication-overuse headaches. Surgical nerve decompression is not a pharmacologic preventive approach, and the primary pharmacologic strategy for chronic migraine is regular preventive therapy as described.