Eszopiclone and Abametapir: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jun 30, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Abametapir
No brand names on recordEszopiclone
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Abametapir is a lotion used to treat head lice. Even though you put it on your scalp, a little can get into your body and briefly slow down a liver enzyme (called CYP3A4) that helps break down many medicines.
Eszopiclone (Lunesta) is a sleep medicine that your body clears using that same enzyme. So after using abametapir, Lunesta could build up and hit you harder than usual, meaning more drowsiness, grogginess, dizziness, or trouble waking up. This effect is expected to be strongest in the two weeks after the lice treatment. The good news: your care team can easily manage this by planning the timing, so check with your pharmacist or doctor.
Mechanism: Abametapir is a potent CYP3A4 inhibitor. Eszopiclone is a CYP3A4 substrate (and CYP2E1), so inhibited metabolism is expected to increase eszopiclone exposure (AUC/Cmax).
Direction: Increased eszopiclone effect, higher risk of sedation, psychomotor impairment, and next-day residual effects.
- Onset: rapid; inhibition may persist for up to ~2 weeks after a single topical application.
- Evidence: theoretical, based on abametapir's known CYP3A4 inhibition.
- Severity: major.
- Management: Avoid CYP3A4 substrates, including eszopiclone, for 2 weeks after abametapir application; if unavoidable, avoid abametapir. Dose may be individualized and monitoring increased if co-use occurs.
What happens
Increased exposure of CYP3A4 substrate
Interaction Deep Dive
Within a 2 week window following abametapir application, the use of CYP3A4 substrates should be avoided. Should avoiding these substrates not be practical, then abametapir itself should be avoided 1.
Why it happens (mechanism)
Inhibition of CYP3A4-mediated metabolism by abametapir
How to manage this interaction
This is manageable mostly with timing. The main documented approach is to keep the two medicines apart:
- Avoid taking eszopiclone (Lunesta) for about 2 weeks after applying abametapir, since the lice treatment can raise eszopiclone levels during that window.
- If avoiding eszopiclone is not feasible, the care team may instead choose to hold off on the abametapir lice treatment.
- Keep taking your medicines as prescribed and do not stop anything on your own.
Tell your pharmacist or prescriber you use both so they can plan the timing and watch for extra drowsiness or grogginess if the two overlap.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Eszopiclone and Abametapir together?
Abametapir can make Lunesta build up and cause stronger drowsiness for about two weeks after the lice treatment, so space them apart and let your pharmacist or doctor plan the timing. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Eszopiclone and Abametapir interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.
How is the Eszopiclone and Abametapir interaction managed?
This is manageable mostly with timing. The main documented approach is to keep the two medicines apart: Avoid taking eszopiclone (Lunesta) for about 2 weeks after applying abametapir, since the lice treatment can raise eszopiclone levels during that window. If avoiding eszopiclone is not feasible, the care team may instead choose to hold off on the abametapir lice treatment. Keep taking your medic… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Eszopiclone or Abametapir need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (1)
- Product Information: XEGLYZE(TM) topical lotion, abametapir topical lotion. Dr Reddy’s Laboratories Inc (per FDA), Princeton, NJ, 2020. DailyMed
Keep reading about Abametapir
Keep reading about Eszopiclone
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