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Drugs reference index «Implanon»



Generic name: EtonogestrelBrand names: Implanon

Why is Implanon prescribed?

Implanon is a type of birth control for women. It is a flexible plastic rod the size of a matchstick that is put under the skin of your arm. Implanon contains a hormone called etonogestrel. You can use a single Implanon rod for up to 3 years. Because Implanon does not contain estrogen, your doctor may recommend Implanon even if you cannot use estrogen.

Most important fact about Implanon

If Implanon is not placed properly, it may not prevent pregnancy or it may be difficult or impossible to remove. After you receive Implanon, check that it is in place by pressing your fingertips over the skin in your arm where Implanon was placed. You should be able to feel the Implanon rod.

How should you take Implanon?

Your doctor will insert (or remove) Implanon in a minor surgical procedure in the office. Implanon is inserted just under the skin on the inner side of your upper arm.

What side effects may occur?

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue using Implanon.

  • Side effects may include:Acne, depression, headache, mood swings, weight gain

The most common side effect of Implanon is a change in your menstrual periods. Expect your menstrual period to be irregular and unpredictable throughout the time you are using Implanon. You may have more bleeding, less bleeding, or no bleeding. The time between periods may vary, and in between periods you may have spotting.

Why should Implanon not be prescribed?

Do not begin treatment with Implanon if you:

  • Are pregnant or think you may be pregnant
  • Have a history of blood clots, such as clots in your legs, lungs, eyes, heart, or brain (stroke)
  • Have unexplained vaginal bleeding
  • Have liver disease
  • Have ever had breast cancer
  • Are allergic to anything in Implanon

Special warnings about Implanon

Within 7 days of Implanon placement, it is best to abstain from sex or use alternate forms of birth control.

Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Implanon. Also, talk to your doctor about your complete medical history, especially if you have a history of diabetes, high cholesterol or triglycerides, headaches, seizures or epilepsy, gallbladder or kidney disease, depression, high blood pressure, or you are allergic to anesthetics or antiseptics.

Possible food and drug interactions when taking Implanon

If Implanon is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Implanon with thyroxine.

Special information if you are pregnant or breastfeeding

Implanon should not be taken if you are pregnant, planning to become pregnant, or are breastfeeding. Implanon may be present in breast milk.

Recommended dosage for Implanon


Implanon is a matchstick-size rod that will be implanted in your arm by your doctor. It can remain there for 3 years and then has to be replaced with a new one to prevent pregnancy.


Any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.

  • Implanon Prescribing Information (FDA)
  • Implanon Advanced Consumer (Micromedex) - Includes Dosage Information
  • Implanon Consumer Overview
  • Etonogestrel Professional Patient Advice (Wolters Kluwer)

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