What is Etonogestrel Intradermal Route: Uses, Dosage, Side Effects and More

Etonogestrel intradermal route refers to a birth control implant that goes under the skin of your upper arm. This small, flexible rod releases hormones steadily for three years to prevent pregnancy.

The implant works by releasing a synthetic hormone called etonogestrel, which is similar to progesterone that your body naturally makes. It's one of the most effective forms of reversible birth control available today, with over 99% effectiveness in preventing pregnancy.

What is Etonogestrel?

Etonogestrel is a synthetic hormone that mimics progesterone, one of the key hormones in your menstrual cycle. When delivered through an implant under your skin, it provides consistent hormone levels without you having to remember daily pills.

The implant itself is about the size of a matchstick and contains 68 milligrams of etonogestrel. It's made of a flexible plastic core surrounded by a membrane that controls how the hormone is released into your body over time.

What is Etonogestrel Used For?

Etonogestrel implants are primarily used for long-term birth control in women who want effective contraception without daily maintenance. The implant provides continuous pregnancy prevention for up to three years.

Some doctors may also recommend this implant for women who have trouble remembering to take daily birth control pills or who experience side effects from estrogen-containing contraceptives. The implant only contains progestin, making it suitable for women who cannot take estrogen.

In some cases, healthcare providers might suggest this option for women who have heavy menstrual bleeding, as many users experience lighter periods or no periods at all while using the implant.

How Does Etonogestrel Work?

Etonogestrel works through multiple mechanisms to prevent pregnancy, making it a very strong and reliable form of contraception. The hormone primarily stops your ovaries from releasing eggs each month.

The implant also thickens the mucus in your cervix, creating a barrier that makes it harder for sperm to reach any egg that might be released. Additionally, it changes the lining of your uterus, making it less likely for a fertilized egg to implant.

Because the hormone is released directly into your bloodstream through your skin, it bypasses your digestive system. This means it works even if you're sick with vomiting or diarrhea, unlike birth control pills.

How Should I Take Etonogestrel?

You don't actually "take" etonogestrel in the traditional sense since it's an implant that a healthcare provider inserts under your skin. The insertion procedure is quick and done in a doctor's office using local anesthesia.

Your doctor will insert the implant in the inner side of your upper arm, usually in your non-dominant arm. The insertion takes just a few minutes, and you'll be able to go home the same day.

Before insertion, your doctor will make sure you're not pregnant and will discuss the best timing based on your current birth control method. If you're switching from pills, the implant might be inserted during your pill-free week or while you're taking active pills.

After insertion, you'll need to keep the insertion site dry for 24 hours and avoid heavy lifting with that arm for a few days. Your doctor will provide specific aftercare instructions to ensure proper healing.

How Long Should I Take Etonogestrel For?

The etonogestrel implant is designed to work for exactly three years from the date of insertion. After three years, the hormone levels become too low to reliably prevent pregnancy, so the implant must be removed.

You can have the implant removed at any time before the three years are up if you want to become pregnant or if you're experiencing side effects you can't tolerate. Fertility typically returns quickly after removal, often within a few weeks.

If you want to continue using this form of birth control after three years, your doctor can remove the old implant and insert a new one during the same appointment. Many women choose to do this because they're satisfied with how well the implant works.

What Are the Side Effects of Etonogestrel?

Like all hormonal contraceptives, the etonogestrel implant can cause side effects, though many women tolerate it well. The most common side effect is changes in your menstrual bleeding patterns.

Here are the most frequently reported side effects that you might experience:

• Irregular bleeding or spotting between periods
• Heavier or lighter periods than usual
• Complete absence of periods (amenorrhea)
• Headaches or migraines
• Weight gain (typically 1-2 pounds)
• Mood changes or depression
• Acne or skin changes
• Breast tenderness
• Nausea

Most of these side effects are mild and often improve after the first few months as your body adjusts to the hormone. However, bleeding changes may persist throughout the three years of use.

While rare, some women may experience more serious side effects that require medical attention:

• Severe depression or mood changes
• Severe abdominal pain
• Heavy bleeding that lasts for weeks
• Signs of infection at the insertion site
• Severe allergic reactions
• Blood clots (extremely rare with progestin-only methods)

If you experience any of these more serious symptoms, contact your healthcare provider right away. They can help determine if the implant is right for you or if you need to consider removal.

Who Should Not Take Etonogestrel?

While the etonogestrel implant is safe for most women, certain medical conditions and situations make it unsuitable or require special consideration. Your doctor will review your medical history carefully before recommending this option.

You should not get the etonogestrel implant if you have any of these conditions:

• Current or suspected pregnancy
• Active liver disease or liver tumors
• History of breast cancer or other hormone-sensitive cancers
• Unexplained vaginal bleeding
• Allergy to etonogestrel or any implant components
• Current blood clots or history of blood clotting disorders

Your doctor will also use caution if you have diabetes, high blood pressure, or a history of depression, as these conditions may be affected by hormonal changes.

Certain medications can also interact with etonogestrel, potentially making it less effective. These include some seizure medications, HIV medications, and herbal supplements like St. John's wort. Always tell your doctor about all medications and supplements you're taking.

Etonogestrel Brand Names

The etonogestrel implant is sold under the brand name Nexplanon in the United States. This is currently the only FDA-approved etonogestrel implant available in the U.S.

Previously, a similar implant called Implanon was available, but it was replaced by Nexplanon in 2011. Nexplanon has improved features, including being easier to see on X-rays and having a redesigned insertion device.

In other countries, the etonogestrel implant may be available under different brand names, but the medication and its effects remain the same.

Etonogestrel Alternatives

If the etonogestrel implant isn't right for you, several other long-acting and short-acting birth control options are available. Each has its own benefits and considerations.

Long-acting alternatives include:

• Copper IUD (ParaGard) - lasts up to 10 years, hormone-free
• Hormonal IUDs (Mirena, Skyla, Kyleena) - last 3-7 years depending on type
• Depo-Provera shot - given every 3 months

Short-acting alternatives include birth control pills, patches, vaginal rings, condoms, and diaphragms. These require more frequent attention but give you more control over starting and stopping.

Your healthcare provider can help you compare these options based on your lifestyle, medical history, and personal preferences to find the best fit for you.

Is Etonogestrel Better Than Mirena IUD?

Both the etonogestrel implant and Mirena IUD are highly effective long-acting contraceptives, but they work differently and may suit different preferences. The choice between them depends on your individual needs and how your body responds to different hormones.

The etonogestrel implant offers some advantages: it's easier to insert and remove, doesn't require a pelvic exam for insertion, and some women prefer having the contraceptive in their arm rather than their uterus. It also uses a different type of progestin, which some women tolerate better.

The Mirena IUD has its own benefits: it lasts longer (up to 7 years versus 3 years), often makes periods much lighter or eliminates them entirely, and may help with heavy menstrual bleeding. It's also inserted during a routine office visit but requires a pelvic exam.

Both methods are over 99% effective at preventing pregnancy. The main differences come down to personal preference, how your body responds to the specific hormones, and practical considerations like how long you want the contraceptive to last.