Neurology · Headache Disorders
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Migraine is a unilateral, pulsatile headache often associated with nausea, photophobia, and phonophobia.
The presence of a reversible aura, typically visual disturbances like scintillating scotoma, precedes the headache phase in approximately 25% of patients.
First-line abortive therapy for acute moderate-to-severe migraine attacks is triptans, which act as serotonin 5-HT1B/1D agonists.
Triptans are contraindicated in patients with coronary artery disease, Prinzmetal angina, or uncontrolled hypertension due to the risk of vasoconstriction.
Preventive therapy is indicated for patients with frequent attacks, prolonged duration, or significant disability, with beta-blockers (e.g., propranolol) serving as the first-line choice.
Medication overuse headache is a common complication resulting from the frequent use of analgesics, triptans, or ergots for more than 10-15 days per month.
CGRP antagonists (e.g., erenumab) are highly effective monoclonal antibodies used for the prophylaxis of chronic migraine in patients who fail traditional therapies.
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A 28-year-old woman presents to the clinic complaining of recurrent, severe headaches. She describes the pain as throbbing and unilateral, usually lasting 12 to 24 hours. She reports associated nausea and sensitivity to light and sound, often forcing her to lie in a dark room. Before the onset of pain, she frequently sees shimmering zig-zag lines in her visual field that resolve within 30 minutes. Her physical examination is unremarkable, and her neurological exam is non-focal.
What is the most appropriate first-line abortive treatment for this patient's acute symptoms?
Sumatriptan
The patient's presentation of a unilateral, pulsatile headache with aura and photophobia is classic for migraine; triptans are the gold standard for acute abortive therapy.
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Etiology / Epidemiology
Common in women (3:1 ratio) with a strong genetic predisposition.
Clinical Manifestations
Unilateral, pulsatile headache with aura, photophobia, and phonophobia.
Diagnosis
Clinical diagnosis based on the International Classification of Headache Disorders criteria.
Treatment
Sumatriptan for acute attacks; coronary artery disease is a strict contraindication.
Prognosis
Chronic progression occurs in 2-3% of patients; risk of status migrainosus.
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Epidemiology & Etiology
Migraines typically present in the second or third decade of life. Prevalence is significantly higher in females due to hormonal fluctuations. Triggers include menstruation, stress, sleep deprivation, and specific dietary tyramine-containing foods.
Pertinent Anatomy
Involves the trigeminovascular system, specifically the activation of the trigeminal nerve (CN V) and its projections to the meningeal vasculature. This explains the unilateral distribution and referred pain patterns.
Pathophysiology
The process begins with cortical spreading depression, leading to the release of calcitonin gene-related peptide (CGRP). This causes neurogenic inflammation, vasodilation, and sensitization of pain pathways. The aura phase is attributed to transient cortical neuronal dysfunction.
Clinical Manifestations
Patients report a pulsatile headache lasting 4-72 hours, often accompanied by nausea and vomiting. Aura (visual scintillating scotoma) precedes the headache in 25% of cases. Red flags requiring neuroimaging include thunderclap onset, fever, nuchal rigidity, or new-onset focal neurologic deficits.
Diagnosis
Diagnosis is clinical using the ICHD-3 criteria: at least 5 attacks fulfilling specific duration and symptom requirements. Neuroimaging (MRI) is reserved for patients with atypical features or new-onset headache after age 50.
Treatment
First-line abortive therapy is Sumatriptan (a 5-HT1B/1D agonist). Contraindications include ischemic heart disease, uncontrolled hypertension, and pregnancy. Prophylaxis is indicated for >4 attacks/month using propranolol or topiramate.
Prognosis
Most patients achieve symptom control with lifestyle modification and pharmacotherapy. Status migrainosus (headache >72 hours) requires urgent management with IV fluids and antiemetics. Long-term use of analgesics risks medication overuse headache.
Differential Diagnosis
Tension headache: bilateral, band-like pressure
Cluster headache: unilateral, periorbital, autonomic symptoms
Temporal arteritis: elevated ESR, jaw claudication
Subarachnoid hemorrhage: thunderclap, meningismus
Meningitis: fever, nuchal rigidity, altered mental status
Go deeper
Migraines are primary neurovascular pain disorders driven by trigeminal nerve sensitization and CGRP release, managed with acute abortives and chronic suppressive pharmaceuticals.
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