The implant is one of the best birth control methods out there — it’s more than 99% effective. That means fewer than 1 out of 100 women who use Nexplanon will get pregnant each year. It doesn’t get much better than that. The implant is so effective because there’s no chance of making a mistake.
How effective is Implanon?
While news reports have suggested a high risk of pregnancy among Implanon users, it is still considered to be over 99% effective at preventing pregnancy. For every 1,000 women using the implant, fewer than one will get pregnant over three years. Additionally, no form of contraceptive is 100% effective.
What medications affect the implant?
This effect can result in pregnancy. Examples include griseofulvin, modafinil, rifamycins (such as rifampin, rifabutin), St. John’s wort, drugs used to treat seizures (such as barbiturates, carbamazepine, felbamate, phenytoin, primidone, topiramate), HIV drugs (such as nelfinavir, nevirapine, ritonavir), among others.