Migraine Headaches
A severe, throbbing headache often on one side of the head, associated with nausea and sensitivity to light, caused by sensitive brain nerves and blood vessels.
Emergency Management: Status Migrainosus requires ED admission for IV 'Migraine Cocktail': IV Ketorolac 30mg, IV Metoclopramide 10mg, IV Diphenhydramine 25mg, and IV fluids. Dexamethasone 10mg IV is given to prevent recurrence.
Migraine is a complex, chronic neurological disorder characterized by recurrent, severe, unilateral, throbbing headaches that are often accompanied by autonomic symptoms such as nausea, vomiting, photophobia, and phonophobia.
Detailed Overview
It is a highly disabling condition, ranking among the top causes of disability worldwide. About one-third of patients experience an aura—transient focal neurological symptoms (usually visual)—preceding the headache. The pathophysiology involves trigeminovascular system activation and calcitonin gene-related peptide (CGRP) release. Management is divided into acute abortive therapy to stop attacks and prophylactic therapy to reduce their frequency.
Epidemiology & Demographics
Global prevalence is ~15%. Three times more common in women (18%) than men (6%). Peak incidence occurs between ages 25 and 55, causing significant occupational disability.
Etiological Mechanism
A complex interplay of genetic and environmental factors resulting in a state of neuronal hyperexcitability. A strong family history is present in 70-80% of sufferers.
Primary Causes
Triggers include hormonal fluctuations (menstruation), stress, lack of sleep, sensory stimuli (bright lights, strong smells), and certain foods (aged cheese, alcohol, MSG).
Migraine involves primary neuronal dysfunction. It begins with Cortical Spreading Depression (CSD), a wave of neuronal depolarization followed by sustained depression, which correlates with the aura. This activates the Trigeminal Cervical Complex. The trigeminal nerve endings in the meninges release potent vasodilators and inflammatory neuropeptides, most notably Calcitonin Gene-Related Peptide (CGRP) and Substance P. This causes neurogenic inflammation of the meningeal blood vessels, leading to the throbbing pain, which is transmitted back to the brainstem and thalamus (central sensitization).
Diagnostic Criteria & Guidelines
ICHD-3 Criteria for Migraine without Aura: At least 5 attacks fulfilling: 1) Lasting 4-72 hours. 2) Two of: unilateral, pulsating, moderate/severe intensity, aggravated by routine activity. 3) One of: nausea/vomiting, or photophobia AND phonophobia. 4) Normal neuro exam.
Abortive: Triptans (Sumatriptan 50-100mg PO, or 6mg SubQ for rapid onset) taken at the very onset of pain, often combined with an NSAID (Naproxen 500mg PO). Antiemetics (Metoclopramide 10mg IV) for nausea. Preventive: Beta-blockers (Propranolol 40mg PO BID) or Topiramate 25-50mg PO BID.
Second-Line & Adjunctive Therapy
Abortive: CGRP receptor antagonists (Ubrogepant 50mg PO) or Lasmiditan. Preventive: Anti-CGRP monoclonal antibodies (Erenumab 70mg SubQ monthly, Fremanezumab) or Amitriptyline 10-25mg PO at bedtime.
Surgical & Procedural Management
Botulinum Toxin A (Botox) injections every 12 weeks for Chronic Migraine (≥15 headache days/month).
Patient Counseling & Advice
Warn strongly against taking acute abortive medications more than 2-3 days per week to prevent Medication Overuse Headache. Counsel women with Migraine WITH Aura to avoid estrogen-containing oral contraceptives due to increased stroke risk.
Follow-Up & Monitoring Schedule
Review headache diary every 3 months. Assess efficacy of preventive therapy (success is defined as a >50% reduction in headache frequency or severity).
Preventive Strategies
Initiate preventive daily medications if the patient experiences ≥ 4 debilitating headache days per month, or if acute treatments are contraindicated or overused.
Migraine is a chronic condition without a cure, but it is highly manageable. Frequency and severity often decrease naturally post-menopause in women and in later life for men.