Can Nexplanon (etonogestrel) cause anxiety or mood changes?

Can Nexplanon Cause Anxiety or Mood Changes?

Yes, Nexplanon can cause mood changes including anxiety and depression, and the FDA label specifically warns that women with a history of depressed mood should be carefully observed, with consideration given to removing the implant in patients who become significantly depressed. 1

FDA-Recognized Mood Effects

The official FDA labeling for Nexplanon explicitly addresses this concern under warnings and precautions:

• Section 5.13 states: "Women with a history of depressed mood should be carefully observed. Consideration should be given to removing NEXPLANON in patients who become significantly depressed." 1

This is a formal warning in the drug label, indicating that mood changes are a recognized adverse effect requiring clinical monitoring and potential intervention.

Clinical Evidence on Mood Changes

Reported Incidence

In clinical practice, mood changes are commonly reported by Nexplanon users, with approximately 34% of users reporting mood changes in a large cohort study of 900 participants 2. However, this same study found that serum etonogestrel concentrations do not correlate with mood symptoms, suggesting the mechanism is more complex than simple dose-response.

Temporal Pattern

One study examining quality of life found that users experienced temporary reductions in vitality, mental health, social functioning, and emotional role functioning in the first three months of treatment, which appeared to resolve after six months 3. This suggests mood effects may be most prominent early in treatment.

Severe Cases

Case reports document major depression and panic disorder associated with Implanon use, though these represent rare occurrences 4.

Clinical Management Algorithm

For women considering Nexplanon:

1. Screen for history of depression, anxiety, or mood disorders before insertion
2. If positive history exists, counsel extensively about mood-related risks and ensure close monitoring plan is in place
3. Consider alternative contraception if severe or unstable mood disorder

For current users reporting mood changes:

1. Assess severity using standardized tools (e.g., PHQ-9 for depression)
2. If mild and within first 3-6 months: monitor closely as symptoms may resolve
3. If moderate to severe, or persistent beyond 6 months: strongly consider implant removal as recommended by FDA labeling 1
4. Do not assume higher drug levels are the cause—individual susceptibility varies independently of serum concentrations 2

Important Caveats

• The mechanism linking Nexplanon to mood changes remains unclear and does not correlate with serum drug levels 2, making it impossible to predict who will experience these effects based on pharmacokinetics
• Mood changes are not listed as a contraindication to Nexplanon use, but rather as a warning requiring careful observation 1
• The implant can be removed at any time if mood symptoms become problematic, with fertility returning rapidly after removal 1

The bottom line: Mood changes including anxiety and depression are recognized adverse effects of Nexplanon that warrant careful monitoring, particularly in women with pre-existing mood disorders, and removal should be strongly considered if significant depression develops.