Which contraception methods are contraindicated or used with caution in patients with estrogen-containing therapies?

• A. Progestin-only methods may be preferred in certain conditions
• B. Estrogen-containing methods are avoided in smokers over 35 years, thromboembolic risk, or certain hypertension
• C. Copper IUDs are safe with estrogen therapies
• D. Emergency contraception is always acceptable

Answer: (A)

When a patient is using estrogen-containing therapy, adding another source of estrogen through contraception raises risks such as thromboembolism and cardiovascular effects. To lower those risks, contraception that does not introduce estrogen is preferred. Progestin-only methods fit this need because they provide reliable birth control without estrogen, making them the best choice in conditions where estrogen exposure should be minimized or avoided. This includes progestin-only pills, a progestin-releasing intrauterine device, implants, or injections, which can be used safely alongside estrogen therapies to maintain contraception without increasing estrogen-related risks.

Estrogen-containing methods would add to the estrogen burden and are typically avoided or used with caution in patients who already have estrogen exposure. Non-hormonal options like copper IUDs do not add estrogen but aren’t the focal point of this scenario, and emergency contraception isn’t universally applicable without considering timing and interactions. The key idea is that progestin-only options offer effective contraception without adding estrogen, which is why they are preferred in these contexts.