Reducing Attack Frequency: Preventive Treatment Options

If your migraine attacks are frequent, severe, or making it hard to live your life, it may be time to move beyond stopping individual attacks and start preventive treatment. The goal of prevention is not necessarily to eliminate every migraine but to “lower the volume” of the disease—reducing the frequency, severity, and duration of attacks while improving your responsiveness to acute medications ^[1][2].

When to Start Prevention

Neurologists generally suggest considering preventive therapy if you experience ^[2][3]:

• About four migraine days per month or fewer when attacks are disabling, acute treatments fail or are contraindicated. (A migraine day involves migraine features or successful early treatment; a headache day is any non-migraine head pain).
• Attacks that significantly interfere with your work or social life despite using acute treatments.
• A risk of Medication Overuse Headache because you are using acute drugs too often.

A New Standard: 2024 AHS Guidelines

For years, patients were required to “fail” older, cheaper medications before they could try newer, migraine-specific treatments. However, a major 2024 U.S. position statement from the American Headache Society (AHS) has changed this ^[4].

Current guidelines now elevate CGRP-targeted therapies—including monoclonal antibodies (like erenumab, fremanezumab, and galcanezumab) and gepants (like atogepant and rimegepant)—to first-line options ^[4]. This means you and your doctor can choose these newer treatments from the very beginning, alongside traditional oral medications, based on your personal health needs and preferences, though regulatory approval, cost, and insurance step-therapy requirements vary by country and plan ^[4][5].

First-Line Preventive Options

Because migraine is a systemic disorder, different medications work on different “switches” in the nervous system.

CGRP-Targeted Therapies

These are the first treatments designed specifically for migraine biology.

• Monoclonal Antibodies (mAbs): These are usually given as a self-injection once a month or as an IV infusion every three months, depending on the product ^[4][6].
• Gepants: These are oral pills. Dosing and schedules vary: atogepant is generally taken once daily for prevention, whereas rimegepant is generally taken every other day for prevention ^[7].
• The Advantage: These treatments often have fewer “off-target” side effects than older drugs for many individuals ^[6]. In real-world studies, more people stay on these treatments long-term compared to oral pills, though cost and access remain factors ^[8].
• The Risks: Common side effects include injection-site reactions, constipation, and occasionally a transient rise in blood pressure ^[9][10]. Human safety data for CGRP therapies in pregnancy are limited; they are generally not initiated or are discontinued in pregnancy, so discuss preconception counseling with your clinician.

Traditional Oral Preventives

These older medications were originally designed for other conditions (like high blood pressure or epilepsy) but were found to be effective for migraine.

• Beta-blockers (e.g., Propranolol): Often used if you also have high blood pressure or anxiety ^[11].
• Topiramate: This is a common choice but carries a higher risk of side effects, including “brain fog” (cognitive slowing), tingling in the hands or feet, and taste changes ^[12][13].
• Safety Warning: Topiramate carries important fetal risks and is contraindicated for migraine prevention in some jurisdictions. Tell your clinician if you are pregnant, planning to become pregnant, or breastfeeding. Do not abruptly start, stop, or change a preventive medication without your prescriber.

Chronic Migraine and Botox

The strategy for prevention changes if your condition has progressed to chronic migraine. This is defined as having a headache on at least 15 days per month for at least three months, where at least 8 of those days are migraines ^[14].

• OnabotulinumtoxinA (Botox): This is specifically indicated for chronic migraine ^[15]. It is not usually recommended for “episodic” migraine (fewer than 15 days a month) ^[14].
• The Procedure: Botox involves 31 to 39 small injections across the head and neck muscles every 12 weeks ^[16][17].
• The Efficacy: It can take two or three treatment cycles (6 to 9 months) to feel the full benefit ^[16][18]. Common side effects include temporary neck pain or a “droopy” eyelid ^[19].

Choosing Your Path

There is no single “best” preventive; the right choice depends on your “comorbidities”—other health conditions you may have ^[4]. For example, if you have insomnia, an antidepressant like amitriptyline might help both your sleep and your migraines. If you have cardiovascular disease, CGRP-targeted agents are often preferred because they do not constrict blood vessels like some other options ^[20][21].

Most preventives take time to show their full effect—some CGRP options work faster, but a typical trial is 8 to 12 weeks. Work with your doctor to judge success by looking at migraine days, total headache days, disability, and acute-medication use ^[4][18].