How Anti-Androgenic Birth Control Works
Anti-androgenic birth control pills are combined oral contraceptives (COCs) that contain estrogen and progestin to counteract the effects of androgens. They primarily work by reducing ovarian androgen production, increasing sex hormone-binding globulin (SHBG) which binds to testosterone, and blocking androgen receptors in tissues like skin and hair follicles.
Key Anti-Androgenic and Low-Androgen Progestins
Certain progestins in birth control pills have anti-androgenic effects, while others may be androgenic.
Drospirenone (e.g., Yaz, Yasmin, Beyaz)
Drospirenone is a progestin with moderate anti-androgenic properties. It is effective for treating moderate acne and hirsutism and can help with bloating. Yaz is approved by the FDA for treating moderate acne and PMDD. However, drospirenone-containing pills may have a slightly higher risk of blood clots and should be used cautiously in those with certain health conditions.
Cyproterone Acetate (e.g., Diane-35, Cyestra-35)
Cyproterone acetate (CPA) is a potent anti-androgenic progestin used for severe acne and hirsutism when other treatments fail. It strongly blocks androgen receptors and reduces androgen production. Due to a significantly higher risk of blood clots, its use is restricted in many areas and it is not available in the United States.
Desogestrel (e.g., Desogen, Mircette)
Desogestrel is a third-generation progestin with minimal androgenic activity, suitable for milder androgenic symptoms. It is generally well-tolerated but may carry a slightly higher risk of blood clots than older progestins.
Norgestimate (e.g., Ortho Tri-Cyclen)
Norgestimate, another third-generation progestin, has a low androgenic profile and is effective for treating acne. Ortho Tri-Cyclen was the first birth control pill approved by the FDA for acne. Risks are similar to other COCs.
Comparison Table
Progestin Type | Brand Names (Examples) | Anti-Androgen Potency | Main Benefit for Androgen Symptoms | Notable Risks & Considerations |
---|---|---|---|---|
Drospirenone | Yaz, Yasmin, Beyaz | Moderate | Effective for acne, PMDD, and hirsutism; reduces bloating. | Slightly higher risk of blood clots compared to some alternatives; check potassium levels. |
Cyproterone Acetate | Diane-35, Cyestra-35 | Strongest | Highly effective for severe acne and hirsutism. | Higher risk of blood clots; use is restricted in many countries (not available in the US). |
Desogestrel | Desogen, Mircette | Minimal/Low | Good for milder cases of acne/hirsutism; well-tolerated. | Potential slightly higher risk of blood clots compared to levonorgestrel. |
Norgestimate | Ortho Tri-Cyclen | Low | Specifically approved for acne treatment. | Standard COC risks, but low androgenic activity. |
Potential Side Effects and Safety Considerations
Discuss potential side effects with a healthcare provider, considering individual health factors. Risks include venous thromboembolism (blood clots), which is slightly higher with drospirenone and significantly higher with cyproterone acetate. Other potential side effects include cardiovascular risks, mood changes, breast tenderness, headaches, nausea, or weight changes.
Combining Birth Control with Other Anti-Androgens
For more severe cases, combining a COC with other anti-androgenic medications like spironolactone may be recommended. Spironolactone can boost effectiveness for hirsutism. Metformin may also be used in women with PCOS and insulin resistance.
Conclusion
Several birth control pills offer anti-androgenic effects to treat hormonal acne, hirsutism, and PCOS. Options like Yaz and Yasmin (containing drospirenone) are common, while Diane-35 (cyproterone acetate) is for severe cases with a higher risk profile. Third-generation progestins like desogestrel and norgestimate provide milder benefits. Consult a healthcare provider to determine the best option based on your symptoms, health risks, and availability.
Learn more about anti-androgenic progestins and their use in managing hyperandrogenic conditions on the National Institutes of Health website.