Nexplanon is a small, flexible rod placed under the skin of the upper arm, designed to prevent pregnancy for an extended period. It releases a continuous, low dose of a progestin hormone, etonogestrel, which works by preventing ovulation, thickening cervical mucus, and thinning the uterine lining. This method offers a convenient and highly effective form of birth control.
Immediate Post-Insertion Care
Following Nexplanon insertion, localized tenderness, bruising, and swelling are common at the insertion site. A pressure bandage is typically applied and should remain in place for 24 hours to help minimize bruising. It can then be removed.
A smaller adhesive bandage should remain on the insertion site for an additional 3 to 5 days to allow the area to heal and prevent infection. Keeping the site clean and dry during this period is important. You may use over-the-counter pain relievers, such as ibuprofen or acetaminophen, to manage any mild discomfort.
Anticipated Body Changes
Systemic changes are common after Nexplanon insertion due to hormonal influence. Changes in menstrual bleeding patterns are common side effects, including irregular bleeding, spotting, or absence of periods. Periods may also become heavier, lighter, or change in duration. These changes often stabilize within the first three months.
Other common body changes include mood fluctuations, such as mood swings or feelings of depression. Headaches are also common. Weight changes, including a modest gain, have been observed in some users, though research is mixed on the direct link to Nexplanon itself, suggesting other factors may contribute. Additionally, new or worsening acne may occur, as the progestin can influence oil production.
When Nexplanon Becomes Effective
Nexplanon’s contraceptive effectiveness depends on when it is inserted during your menstrual cycle. If the implant is placed within the first five days of your menstrual period, you are protected from pregnancy immediately. No backup contraception is needed.
If Nexplanon is inserted at any other point in your menstrual cycle, it is recommended to use an additional form of contraception, such as condoms, for the first seven days following the insertion. After this period, the implant is fully effective.
When to Seek Medical Advice
While many post-insertion experiences are normal, certain symptoms warrant contacting a healthcare provider. Signs of infection at the insertion site include severe or persistent pain, increased redness, warmth, swelling, or discharge. Fever may also indicate infection.
Contact your provider if you experience persistent or severe side effects that affect your quality of life, such as severe mood changes or prolonged, heavy bleeding. Also seek medical advice if you suspect pregnancy or cannot feel the Nexplanon implant under your skin after insertion.