Nexplanon is an implantable type of hormonal birth control that lasts for 3 years. Nexplanon is placed under the skin in your inner, upper arm. This is done in the physician’s office using local anesthesia.
Nexplanon is 99% effective in preventing pregnancy. It works by putting a steady, low dose of hormone (etonogestrel) into the bloodstream, preventing pregnancy for up to 3 years. Hormones in birth control keep an egg from being released by the ovary and prevent sperm from reaching the egg.
The most common side effect of Nexplanon, according to the manufacturers, is a change in your menstrual bleeding pattern. You may experience longer or shorter bleeding during your periods or have no bleeding at all. The time between periods may vary, and in between periods you may also have spotting.