Levamlodipine 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 recordLevamlodipine
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 enzyme is what breaks down your blood pressure medicine, levamlodipine (Conjupri).
When that enzyme is slowed, levamlodipine can build up in your body. That could make its effects stronger, which might lead to low blood pressure, dizziness, flushing, or swollen ankles. This effect can last for about two weeks after using the lice treatment. The good news is your care team can plan around this easily, so please check with your pharmacist or doctor before using both.
Mechanism: Abametapir inhibits CYP3A4. Levamlodipine is a CYP3A4 substrate (not a prodrug), so inhibition reduces its clearance and increases systemic exposure (AUC/Cmax).
Effect: Increased levamlodipine exposure, potentially enhancing antihypertensive and vasodilatory effects (hypotension, dizziness, peripheral edema, flushing).
- Onset: rapid
- Evidence: theoretical
- Magnitude: not quantified; enzyme inhibition may persist ~2 weeks post-application
Management: Avoid CYP3A4 substrates within 2 weeks after abametapir application. If unavoidable, avoid abametapir. Monitor blood pressure and for signs of hypotension if co-exposure occurs.
What happens
Increased exposure of CYP3A4 substrate
Interaction Deep Dive
For a period of two weeks following the application of abametapir, refrain from using CYP3A4 substrates. Should that not be practical, abametapir itself should not be used 1.
Why it happens (mechanism)
Inhibition of CYP3A4-mediated metabolism by abametapir
How to manage this interaction
Both medicines can still be used safely with the right plan. The documented guidance is:
- Timing matters: avoid using levamlodipine (a CYP3A4 substrate) within 2 weeks after applying abametapir, since the lice treatment can raise levamlodipine levels during that window.
- If separating them that way is not possible, the alternative is to avoid using abametapir.
- Keep taking your blood pressure medicine as prescribed and do not stop anything on your own.
Before using the lice treatment, tell your pharmacist or prescriber you take levamlodipine so they can help you time things or choose another option. Report any dizziness, lightheadedness, or new swelling.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Levamlodipine and Abametapir together?
Abametapir can raise levamlodipine levels by blocking its breakdown, so avoid taking levamlodipine within two weeks after using abametapir; if that is not possible, the lice treatment should be avoided. Check with your pharmacist or doctor first. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Levamlodipine 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 Levamlodipine and Abametapir interaction managed?
Both medicines can still be used safely with the right plan. The documented guidance is: Timing matters: avoid using levamlodipine (a CYP3A4 substrate) within 2 weeks after applying abametapir, since the lice treatment can raise levamlodipine levels during that window. If separating them that way is not possible, the alternative is to avoid using abametapir. Keep taking your blood pressure medicin… 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 Levamlodipine 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 Levamlodipine
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