Preparing for Nexplanon insertion is straightforward, but a few details about timing, medications, and what to expect can make the experience smoother. The most important preparation step is scheduling: if the implant goes in during the first five days of your period, it works immediately. Miss that window, and you’ll need backup birth control for a full week.
Timing Your Appointment
The ideal time to schedule insertion is within the first five days of your menstrual bleeding. This timing guarantees the implant starts protecting against pregnancy right away, with no need for condoms or other backup methods. If your provider places it later in your cycle, you’ll need to use a barrier method like condoms for seven days afterward while the implant’s hormone reaches effective levels.
If you’re switching from another birth control method, the timing rules shift. Your provider will coordinate the transition so there’s no gap in protection. For example, switching from the pill typically means getting the implant placed during your pill pack’s active days. Bring up your current method when you schedule so the office can advise you on the right day to come in.
What Your Provider Will Screen For
A pregnancy test is standard before insertion. Let your provider know if you’ve missed a period or think there’s any chance you could be pregnant. Beyond that, your provider will review your medical history for a handful of conditions that rule out Nexplanon use:
- Current or past blood clots (deep vein thrombosis, pulmonary embolism, or similar clotting disorders)
- Active liver disease or liver tumors
- Unexplained abnormal uterine bleeding that hasn’t been evaluated
- Current or past breast cancer, or other cancers sensitive to hormones
- Allergy to any component of the implant
None of these require special testing on your part. Your provider will ask the right questions. What you can do is come prepared with an honest, complete medical history.
Medications and Supplements to Mention
Certain drugs can reduce Nexplanon’s effectiveness by speeding up how your liver processes its hormone. If you take any of the following, tell your provider before the appointment: anti-seizure medications (including phenytoin, carbamazepine, oxcarbazepine, topiramate, or felbamate), the antibiotic rifampin, the antifungal griseofulvin, the HIV medication efavirenz, or the herbal supplement St. John’s wort. These won’t necessarily prevent you from getting the implant, but your provider needs to factor them into your contraceptive plan.
What Happens During the Procedure
The implant goes into the inner side of your non-dominant upper arm, positioned over the triceps muscle about 3 to 4 inches above the elbow. You won’t need to undress beyond rolling up or removing a sleeve.
Your provider cleans the area, then injects a small amount of local anesthetic (the same numbing agent used at the dentist) right at the insertion site. This is usually the only part that stings. Once the skin is numb, the implant is placed just under the surface using a special applicator. The rod itself is about the size of a matchstick. Most people feel pressure but not pain, and the whole process takes just a few minutes. Afterward, your provider will ask you to feel the implant under your skin to confirm it’s in place.
Day-Of Preparation Tips
There’s no fasting required and no need to take time off work or school, though you may want to plan for some arm soreness the rest of the day. Wear a short-sleeved or loose-fitting top so your provider can easily access your upper arm. Eat a normal meal beforehand, especially if needles or medical procedures make you lightheaded. If you tend to feel anxious during procedures, letting your provider know ahead of time gives them a chance to walk you through each step as it happens.
You can drive yourself to and from the appointment. The numbing injection is localized, so it won’t affect your ability to use your arm for steering, though the site may feel tender once the anesthetic wears off a couple of hours later.
Aftercare and Recovery
Your provider will apply a pressure bandage over the insertion site. Keep this on for 24 hours. Underneath, there will be a smaller adhesive bandage (like a butterfly strip) that should stay in place for three to five days. Avoid getting the adhesive strips wet or peeling them off early, as they help the tiny insertion point close cleanly.
Some bruising, mild soreness, or slight swelling at the site is normal and typically fades within a week or two. In clinical trials, pain at the insertion site was the most commonly reported local side effect, occurring in roughly 1 to 3 percent of people. Bruising and redness were reported at similar low rates. You can use an over-the-counter pain reliever and apply a cold pack (over the bandage) if the area feels sore.
Avoid heavy lifting or strenuous upper-body exercise with that arm for a day or two. Light activity like typing, eating, or carrying a bag is fine. After the bandages come off and any bruising resolves, there are no ongoing activity restrictions. The implant sits securely under the skin and won’t shift during exercise or daily life.
What to Expect in the First Few Months
The most common adjustment isn’t at the insertion site but in your bleeding pattern. Many people experience irregular spotting or lighter periods in the first several months as their body adjusts to the steady release of hormone. Some people stop getting periods entirely, while others have longer or more frequent bleeding episodes early on. These patterns typically settle over time, but they’re worth knowing about so you’re not caught off guard. Keep some period supplies on hand for the first few months even if your provider tells you periods may stop.
Check that you can feel the implant under your skin periodically during the first week. It should feel like a thin, firm rod just beneath the surface. If you can’t feel it at any point, contact your provider, and use backup contraception in the meantime.