## WHO Medical Eligibility Criteria and Migraine with Aura **Key Point:** Migraine with aura is a **Category 4 contraindication** (unacceptable health risk) for combined oral contraceptive pills (COCPs) due to a significantly increased risk of ischaemic stroke, regardless of age or migraine frequency. ### Mechanism of Increased Stroke Risk 1. **Migraine with aura** is an independent risk factor for ischaemic stroke (relative risk ~2–3×) 2. **Oestrogen in COCPs** increases thrombotic risk (relative risk ~3–4× for VTE; stroke risk also elevated) 3. **Combined effect** (migraine + aura + oestrogen) creates a multiplicative risk of ischaemic stroke, estimated at 8–10× baseline 4. This risk persists across all age groups and is **not mitigated by age, frequency of migraines, or aspirin use** **Clinical Pearl:** The distinction between migraine with aura and migraine without aura is critical. Only migraine with aura carries the elevated stroke risk; migraine without aura is Category 2 (benefits usually outweigh risks) for COCPs. **High-Yield:** This is a high-yield NEET PG topic. Examiners frequently test the **migraine with aura + COCP contraindication** because it is commonly misunderstood in clinical practice. ### WHO Category Classification | Condition | COCP Category | Rationale | |-----------|---------------|----------| | **Migraine with aura** | **4 (Unacceptable)** | Multiplicative stroke risk; absolute contraindication | | Migraine without aura | 2 (Acceptable) | Minimal additional stroke risk | | Age > 35 years alone | 2 (Acceptable) | Age is not a contraindication if no other risk factors | | Hypertension (controlled) | 2–3 | Depends on severity; this patient's BP is normal | --- ## Recommended Alternatives **Best alternatives for this patient:** 1. **Copper IUD (T380A)** - Efficacy >99%, duration 10 years - No hormonal side effects or stroke risk - Ideal for multiparous women - WHO Category 1 (no restrictions) 2. **Progestin-only methods** - Progestin-only pills (POP / "mini-pill") - Injectable progestins (DMPA) - Progestin-releasing IUD (LNG-IUS) - All WHO Category 1 for migraine with aura - No increased stroke risk 3. **Barrier methods** (if reversibility is desired but LARC not acceptable) - Condoms, diaphragm - Lower efficacy but no contraindications **Mnemonic:** **COCP + Aura = CONTRAINDICATED** (oestrogen + aura = ischaemic stroke risk) [cite:WHO MEC 2015] --- ## Why Other Options Are Incorrect | Option | Error | |--------|-------| | **Option 1 (Correct)** | Copper IUD and progestin-only methods are the appropriate recommendations | | **Option 2** | False. Age >35 is not a contraindication, but migraine with aura IS, regardless of age. WHO Category 4 applies at all ages. | | **Option 3** | False. Migraine frequency does NOT modify the contraindication. Even a single migraine with aura per year is a Category 4 contraindication. | | **Option 4** | False. Aspirin does not mitigate the oestrogen-induced thrombotic risk in migraine with aura. This is a dangerous misconception. |
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