Contraception Guidelines for Women with Hypertension

Introduction to Contraception and Hypertension

The American College of Cardiology recommends that women with hypertension use progestin-only contraceptives as the first-line hormonal option, while combined hormonal contraceptives should be avoided due to increased cardiovascular risk 1
Combined oral contraceptives cause a small but detectable increase in blood pressure in most women, with approximately 5% developing frank hypertension 2, 3, 4
The Nurses' Health Study found that current users of oral contraceptives had a significantly increased risk of hypertension (RR 1.8; 95% CI 1.5-2.3) compared to never users 2
Blood pressure typically returns to pre-treatment levels within 3 months of discontinuing oral contraceptives, indicating the effect is reversible 2
The hypertensive effect appears to be related to the progestogenic potency of the preparation, not the estrogenic component 2

Combined hormonal contraceptives are contraindicated in women with hypertension, even if well-controlled 5, 6, 7
This includes combined oral contraceptives, vaginal rings, and transdermal patches 1

The European Society of Cardiology recommends assessing baseline cardiovascular risk, including measuring blood pressure before initiating any hormonal contraception, and evaluating for additional risk factors (age >35 years, smoking, obesity, family history of hypertension) 2, 4
For women with controlled hypertension, progestin-only methods are recommended as the first choice, while non-hormonal methods are considered alternatives, and combined hormonal contraceptives are avoided 1, 5, 6, 7
For women using any hormonal method, blood pressure should be checked at least every 6 months 2
The American Heart Association notes that some antihypertensive medications may have interactions with hormonal contraceptives 8

The American College of Cardiology states that combined hormonal contraceptives significantly amplify the already elevated cardiovascular risk in women with uncontrolled hypertension, increasing the odds of myocardial infarction by 6-9 fold and stroke by 8-15 fold compared to women without these risk factors 9

Combined oral contraceptives stimulate hepatic synthesis of angiotensinogen, activating the renin-angiotensin-aldosterone system and raising blood pressure further, according to the European Heart Journal 10, 11
OCPs impair baroreceptor regulation of muscle sympathetic nerve activity, preventing normal compensatory blood pressure reduction, as reported in Hypertension 10
Estrogen components enhance platelet aggregation and adhesiveness, increasing thrombotic risk on top of hypertension-related endothelial dysfunction, as found in Hypertension 10

Hypertensive women using OCPs have 6.1-68.1 times higher odds of myocardial infarction compared to normotensive non-users, according to Hypertension 9
Risk of ischemic stroke increases 8-15 fold in hypertensive OCP users versus women without either risk factor, as reported in Hypertension 9
Meta-analysis data show odds of myocardial infarction are 9.30 times higher among those with hypertension and OCP use compared to 2.48 times among all OCP users, as found in Hypertension 9

The cumulative exposure to elevated blood pressure substantially increases long-term cardiovascular disease risk, as reported in Hypertension 10, 12, 13

The WHO Collaborative Study found no increased odds of cardiovascular disease among progestin-only pill users, even in women with hypertension, according to Hypertension 9