Irregular bleeding is the most common side effect, especially in the first 6–12 months of use.
- For most women, periods become fewer and lighter. After one year, 1 out of 3 women who use Implanon will stop having periods completely.
- Some women have longer, heavier periods.
- Some women have increased spotting and light bleeding between periods.
Less common side effects of Implanon include
- change in sex drive
- discoloring or scarring of the skin over the implant
- pain at the insertion site
- sore breasts
Serious Side EffectsSerious problems usually have warning signs. Tell your health care provider immediately if
- You have bleeding, pus, or increasing redness, or pain at insertion site.
- You have a new lump in your breast.
- You have no period after having a period every month.
- You have unusually heavy or prolonged bleeding from your vagina.
- The implant comes out or you have concerns about its location