A 28-year-old woman with a history of migraine with aura seeks contraception. She has no other medical comorbidities and regular menstrual cycles. Which is the drug of choice for contraception in this patient?

Explanation

## Contraceptive Choice in Migraine with Aura **Key Point:** Migraine with aura is a **WHO MEC Category 4** (absolute contraindication) for combined oral contraceptive pills (COCs) due to significantly increased risk of ischaemic stroke. Progestin-only methods are safe alternatives (WHO MEC Category 1 or 2). ### Why Progestin-Only Pill (POP) is the Drug of Choice **High-Yield:** The progestin-only pill (norethisterone, desogestrel, or levonorgestrel) contains **no estrogen** and therefore does **not** increase thrombotic or stroke risk. Per WHO Medical Eligibility Criteria (WHO MEC 2015) and KD Tripathi, the POP is the **preferred first-line hormonal contraceptive** for women with migraine with aura because: - It is **user-controlled** (can be started/stopped easily) - It provides **reliable contraception** with consistent use - It has **minimal systemic hormonal exposure** compared to depot injections - It is **reversible** immediately upon discontinuation **Clinical Pearl:** The mechanism of increased stroke risk in migraine with aura + COCs involves: - Estrogen-induced prothrombotic/hypercoagulable state - Cortical spreading depression in aura may indicate endothelial dysfunction - Combined effect markedly increases **arterial thrombosis** risk (relative risk ~8-fold) ### Comparison of Options | Method | Estrogen | WHO MEC (Migraine with Aura) | Notes | |--------|----------|------------------------------|-------| | COC (ethinylestradiol + levonorgestrel) | Yes | **Category 4 — Contraindicated** | Absolute contraindication | | Progestin-only pill (norethisterone) | No | **Category 1 — Safe** | **Drug of choice** — user-controlled, reversible | | Levonorgestrel IUD | No | **Category 1 — Safe** | Also acceptable; requires insertion procedure | | Medroxyprogesterone (DMPA) | No | **Category 2 — Generally safe** | Acceptable but irreversible for 3 months per dose | ### Why POP is Preferred Over Levonorgestrel IUD (Option B) Although the levonorgestrel IUD is also WHO MEC Category 1 (safe) in migraine with aura, the **progestin-only pill is conventionally cited as the drug of choice** in pharmacology texts (KD Tripathi) because: 1. It is an **oral medication** — the most accessible and user-controlled method 2. The IUD requires a **clinical procedure** for insertion/removal 3. In the context of a "drug of choice" question, POP represents the preferred **pharmacological** option **Key Point:** COCs are absolutely contraindicated (WHO MEC Category 4) in migraine with aura. Among hormonal options, the progestin-only pill is the preferred drug of choice due to its safety profile, reversibility, and user control. [cite: KD Tripathi 8e Ch 62; WHO Medical Eligibility Criteria for Contraceptive Use, 5th edition, 2015]