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According to neurologists Sarkis Morales-Vidal, MD, and José Biller, MD. Birth control pills do not increase the risk of hemorrhagic strokes, Ischemic strokes are caused by blood clots. Oral contraceptives increase the risk of ischemic stroke, but this risk is very small among women who do not have other stroke risk factors.
Hemorrhagic strokes are caused by bleeding in the brain. Several mechanisms have been proposed to explain why oral contraceptives increase stroke risk, including by raising blood pressure and by making blood hypercoagulable.
When prescribing hormonal contraceptives, physicians should consider the type and dose of estrogen or progestin and route of administration either pill or patch. For healthy women without any stroke risk factors, the stroke risk associated with oral contraceptives is very small.
However, in women with other stroke risk factors, the risk seems higher and, in most cases, oral contraceptive use should be discouraged. These risk factors are high blood pressure, cigarette smoking and migraine headaches.
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