Migraine: Treating the Attack, and Preventing the Next One
Migraine is far more than a bad headache — it's a disabling neurological condition with its own specific drugs. The treatment splits cleanly into two jobs: stopping an attack that's happening now, and preventing attacks from coming. It's a fitting close to the pain section, and it brings back familiar drugs in yet another guise.
Migraine is one of the most common disabling conditions in the world, and it's much more than an ordinary headache. A migraine attack is a neurological event: typically a severe, throbbing headache (often on one side), made worse by movement, and accompanied by nausea and a striking sensitivity to light and sound — sometimes preceded by a warning 'aura' of visual disturbances. Attacks can last hours to days and can be genuinely disabling. Because it's a specific condition with its own biology, migraine has its own dedicated drugs, and the treatment divides neatly into two completely separate goals — a division you've now seen several times in this book: treating the acute attack (abortive treatment) and preventing future attacks (prophylaxis).
Treating the acute attack
Simple painkillers first, then the migraine-specific triptans. For an attack that's happening, treatment steps up in strength. For milder attacks, simple painkillers often work — the NSAIDs and paracetamol from this section — usually combined with an anti-sickness drug (an antiemetic) to settle the nausea and, helpfully, to improve absorption of the painkiller (since migraine slows the stomach). For moderate-to-severe attacks that don't respond, there's a class designed specifically for migraine: the triptans (like sumatriptan). Triptans work on serotonin (5-HT) receptors to constrict the dilated blood vessels around the brain and calm the nerve pathways involved in the attack — they can abort a migraine that ordinary painkillers can't touch. Because they cause blood vessel constriction, they carry a specific caution: they're avoided in people with heart disease or uncontrolled high blood pressure (where narrowing vessels is risky). A newer group of migraine-specific drugs (the 'gepants' and CGRP-targeting treatments) has recently expanded the options. And one important practical trap to know: overusing acute painkillers for frequent headaches can paradoxically cause 'medication-overuse headache' — the treatment itself perpetuating the problem — which is why frequent attacks call for prevention rather than ever-more painkillers.
Preventing attacks — familiar drugs return
When migraines are frequent or disabling, the goal shifts from treating each attack to preventing them — taking a daily drug to reduce how often attacks come. And here's the satisfying part that makes migraine a perfect closing topic: the preventive drugs are almost all borrowed from other chapters of this book. Beta-blockers (like propranolol, from the cardiovascular chapter) are a first-line preventer. Certain anticonvulsants (topiramate, from the epilepsy chapter) prevent migraine too. So do some antidepressants (amitriptyline, from the CNS chapter). None of these was designed for migraine — they're a heart drug, an epilepsy drug and an antidepressant — yet all reduce migraine frequency, each through effects on the excitable nerves and vessels involved. Newer, migraine-specific preventives (the CGRP-blocking antibodies — yes, more targeted biologics) now offer purpose-built options too. This is the ideal note to end the whole section, and the book's recurring theme in miniature: understand a drug by its mechanism, not the disease it was named for, and you'll find the same drugs turning up wherever that mechanism is useful. Migraine prevention is a heart drug, an anticonvulsant and an antidepressant all doing a job none was invented for — a final reminder that in pharmacology, the connections between drugs matter more than the boundaries between diseases.
- Migraine is a disabling neurological condition, not just a headache; treatment splits into acute vs preventive.
- Acute attack: NSAIDs/paracetamol + an antiemetic; escalate to triptans (5-HT agonists) for moderate-severe.
- Triptans constrict vessels → avoid in heart disease/uncontrolled hypertension; beware medication-overuse headache.
- Prevention (for frequent attacks): beta-blockers, topiramate, amitriptyline — all borrowed from other chapters.
- Newer CGRP-targeting drugs are purpose-built for migraine (acute 'gepants' and preventive antibodies).
Migraine prevention is the perfect final illustration of the single biggest idea in this whole book: drugs go where their mechanism is useful, not where their name suggests. The three classic migraine preventers are a beta-blocker (a heart drug), topiramate (an epilepsy drug) and amitriptyline (an antidepressant) — three drugs from three different specialties, none invented for migraine, all preventing it. By now this shouldn't surprise you at all, because you've seen it again and again: aspirin protecting the heart, sildenafil treating the lungs, hydroxychloroquine calming lupus, gabapentin easing nerve pain, anti-TNF drugs treating four different diseases. The names of drugs and the boundaries between diseases are conveniences; the real map of pharmacology is drawn by mechanisms, and once you can read that map, a heart drug preventing headaches is exactly what you'd expect. If there's one thing to carry out of this whole book, it's that — learn the mechanism, and the drug will keep rewarding you in places you never anticipated.
- Overusing acute painkillers/triptans for frequent migraine — causes medication-overuse headache; use prevention.
- Giving a triptan to someone with heart disease/uncontrolled hypertension — vessel constriction risk.
- Forgetting to add an antiemetic for the nausea (which also improves painkiller absorption).
- Treating frequent disabling migraine with acute drugs only — offer preventive treatment.
Which drug is used to ABORT a moderate-to-severe migraine attack?
- Migraine is a disabling neurological condition; split treatment into acute (abort) vs preventive.
- Acute: NSAIDs/paracetamol + antiemetic → triptans (avoid in heart disease); beware medication-overuse headache.
- Prevention: beta-blockers, topiramate, amitriptyline — all borrowed from other chapters; newer CGRP drugs.
- The section's theme: understand a drug by its mechanism, not the disease it was named for.
- Katzung BG. Basic & Clinical Pharmacology — Drugs used in migraine.
- Brunton LL, et al. Goodman & Gilman's The Pharmacological Basis of Therapeutics — 5-HT agonists & migraine therapy.
- NICE / American Headache Society — Migraine management guidelines.
- Whalen K. Lippincott Illustrated Reviews: Pharmacology — Antimigraine drugs.
