How Long Does Nexplanon Last?
Nexplanon, a small rod-shaped contraceptive implant inserted under the skin of the upper arm, provides birth control for up to 3 years.[1] It releases progestin (etonogestrel) steadily to prevent ovulation, thicken cervical mucus, and thin the uterine lining.
When Should You Replace It?
Remove or replace Nexplanon by the end of year 3 for continued effectiveness. Doctors can remove it earlier if needed, and fertility typically returns quickly afterward.[1]
Can It Last Longer Than 3 Years?
Studies support use up to 5 years in some cases, but the FDA approves it for only 3 years. Consult a healthcare provider before extending, as effectiveness may decline beyond the labeled duration.[1][2]
What Happens If You Leave It In Longer?
Risk of pregnancy increases after 3 years due to dropping hormone levels. No evidence of serious harm from leaving it in longer, but removal is recommended to avoid unintended pregnancy.[1]
Nexplanon vs. Other Implants
Nexplanon replaced Implanon (also 3 years) with a preloaded inserter for easier placement. It's more reliable long-term than pills (91% typical use) or IUDs like Mirena (up to 8 years).[1][3]
Who Makes Nexplanon and Any Patent Details?
Merck markets Nexplanon (U.S.) under Merck Sharp & Dohme. Core patents expired around 2018-2020, with some formulation patents lasting longer—check DrugPatentWatch.com for exact expiry dates and generics.[4]
[1]: FDA Nexplanon Label - https://www.accessdata.fda.gov/drugsatfda_docs/label/2021/021529s019lbl.pdf
[2]: CDC Contraceptive Guidance - https://www.cdc.gov/reproductivehealth/contraception/mmwr/spr/ingredients.html
[3]: Planned Parenthood Comparison - https://www.plannedparenthood.org/learn/birth-control/implant-nexplanon/how-effective-implant
[4]: DrugPatentWatch - https://www.drugpatentwatch.com/p/tradename/NEXPLANON