"An 22-year-old, P3, woman requests for oral contraception pills for birth control. She occasionally experiences severe migraine headaches with aura and also has family history of DVT and liver carcinoma. She has regular menstrual cycle with normal pelvic examinations.", Which of the following risk will increase in her with the Use of these drugs? a. liver cancer b. DVT c. Migraine headache d. Stroke
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The textbooks give a very clear, authoritative answer. Here is the full explanation:
Answer: d. Stroke
The correct answer is stroke (ischemic stroke), specifically because this patient has migraine with aura and is being offered a combined oral contraceptive pill (OCP) containing estrogen.
Why Stroke - The Key Mechanism
Migraine with aura and combined oral contraceptives (COCs) are independent risk factors for ischemic stroke. When combined, the risk multiplies dramatically:
- A 1995 case-control study found migraine alone raised ischemic stroke risk (OR 3.5) in young women.
- Women with migraine using OCPs had an OR of 13.9 for ischemic stroke.
- Migraine with aura specifically carried an OR of 6.2.
- The estimated incidence of ischemic stroke in young women with migraine with aura who use OCPs is 28 per 100,000 (age 25-34) and 78 per 100,000 (age 35-44) - compared to ~4 and 11 per 100,000 in the general population.
This is why migraine with aura + combined OCP = WHO Medical Eligibility Criteria Category 4 (absolute contraindication) - the risks outweigh any benefits.
- Bradley and Daroff's Neurology in Clinical Practice, p. 2487-2488
- Creasy & Resnik's Maternal-Fetal Medicine confirms: "migraine with aura and combined oral contraceptives are independent risk factors for stroke, with the combination resulting in a sixfold increased odds of stroke"
Why NOT the Other Options?
| Option | Reasoning |
|---|---|
| a. Liver cancer | OCPs have actually been associated with a small increased risk of hepatocellular adenoma, but not hepatocellular carcinoma. Family history of liver carcinoma is not a contraindication per se, and OCPs do not causally increase liver cancer risk in this context. |
| b. DVT | Estrogen in OCPs does increase DVT risk, and family history of DVT is a concern (possible inherited thrombophilia). However, a family history alone does not confirm her personal risk. More importantly, the question asks which risk increases with use of OCPs in this specific patient, and the most clinically significant and well-established interaction in this case is stroke (due to migraine with aura). DVT risk is raised by OCPs in general, but the migraine-with-aura/stroke combination is the classic and most-tested answer here. |
| c. Migraine headache | OCPs may worsen, improve, or have no effect on migraine frequency - the effect is variable and unpredictable. This is not the primary concern; the stroke risk from the aura + estrogen combination is. |
Clinical Pearl
For a patient with migraine with aura, the recommended approach is:
- Avoid estrogen-containing combined OCPs (Category 4 contraindication)
- Consider progestin-only pills, which do not carry the same increased ischemic stroke risk
- Screen for other vascular risk factors (hypertension, smoking)
The family history of DVT warrants screening for thrombophilia before starting any hormonal contraception, and family history of liver carcinoma warrants caution, but neither produces the same immediate, well-documented multiplicative risk that migraine with aura does for stroke when OCPs are used.
The answer is d. Stroke.
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