Blood Pressure Risk Comparison Between HRT Patches and Birth Control Pills

Introduction to Blood Pressure Effects

The American Heart Association acknowledges that oral contraceptives consistently cause detectable blood pressure increases and frank hypertension in a significant proportion of users, even with modern low-dose formulations 1
Current users of oral contraceptives have an 80% increased risk of hypertension compared with never users, with an absolute risk of 41.5 cases of hypertension per 10,000 person-years attributable to oral contraceptive use 1
The hypertensive effect of oral contraceptives is readily reversible, with blood pressure returning to pretreatment levels within 3 months of discontinuation 1

The Women's Health Initiative found only an average 1 mm Hg increase in systolic blood pressure over 5.6 years among postmenopausal women randomized to conjugated equine estrogen and medroxyprogesterone acetate compared with placebo 2, 3, 4
The Baltimore Longitudinal Study on Aging showed women receiving HRT had a significantly smaller increase in systolic blood pressure over time than nonusers 2, 3
Several studies suggest HRT improves or restores normal nighttime blood pressure "dipping" that may be diminished in postmenopausal women, potentially reducing total blood pressure load and target organ damage 2, 3, 1

For perimenopausal/postmenopausal women with vasomotor symptoms, the American College of Obstetricians and Gynecologists recommends choosing transdermal HRT patches as first-line, with an expected minimal blood pressure effect 5, 2, 3, 4
For reproductive-age women needing contraception, the American Heart Association notes that oral contraceptives carry an 80% increased hypertension risk, with 41.5 additional hypertension cases per 10,000 person-years 1
For women with existing hypertension or cardiovascular risk factors, the European Society of Cardiology recommends that HRT patches are acceptable with close blood pressure monitoring initially, then at 6-month intervals 2, 3, 1, 4