How does it work?Etonogestrel works in three ways: it prevents ovulation, changes your cervical fluid to stop sperm from entering your uterus, and changes the lining of your uterus so that a fertilised egg can’t implant3.
What is it in?Implant
Is it androgenic?No. (Check out our ‘Androgens’ blog for more info on what this means).
What are the side effects?The side effects of etonogestrel are reported separately for the hormonal implant and the vaginal ring. To find out more about these visit the contraception pages on The Lowdown website. Common side effects affecting people using the hormonal implant nexplanon include:1, 5
- Changes to your periods, including irregular bleeding
- Breast tenderness
- Mood changes
- Ovarian cysts
- Skin reactions
- Weight changes
- Joint Formulary Committee. British National Formulary (online) London: BMJ Group and Pharmaceutical Press <https://bnf.nice.org.uk/drug/etonogestrel.html> [Accessed on 13 August 2020]
- Adis Insight. Drug profile: Etonogestrel-releasing intrauterine system – Merck & Co. 7 October 2015. Available from <https://adisinsight.springer.com/drugs/800032917> [Accessed on 13 August 2020]
- Merck. What is Nexplanon?. Available from <https://www.nexplanon.com/what-is-nexplanon/> [Accessed on 13 August 2020]
- Merck. Possible risks and side effects of NuvaRing. Available from <https://www.nuvaring.com/risks-side-effects/> [Accessed on 13 August 2020]
- Family Planning Association. Contraceptive implant. Nov 2020. Available at https://www.sexwise.org.uk/contraception/contraceptive-implant