A patient with an allergy to estrogen seeks a long-lasting birth control method. What is the best option?

In the context of a patient with an allergy to estrogen, Implanon (a type of hormonal implant) is the most suitable long-lasting birth control method. Implanon primarily contains the hormone etonogestrel, which is a progestin and does not contain estrogen. This makes it an effective option for individuals who are either allergic to estrogen or prefer to avoid it for other medical reasons.

Implanon is inserted subdermally in the arm and works by preventing ovulation, thickening cervical mucus to hinder sperm passage, and thinning the uterine lining. Its long-lasting nature allows it to provide effective contraception for up to three years without requiring daily management by the patient.

In contrast, options like Ortho Evra (a transdermal patch) and oral contraceptives contain estrogen, which poses a risk for someone with an allergy. The cervical cap, while a non-hormonal option, may not provide the same reliability and longevity in preventing pregnancy as the hormonal implant does. Hence, Implanon stands out as the safest and most effective alternative for this specific patient scenario.