Drug interactions
Praziquantel + Rifapentine
Severity: Major
Praziquantel and Rifapentine: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Rifamycins strongly induce CYP3A4 and rifampicin markedly reduces praziquantel exposure to subtherapeutic levels. Rifapentine is expected to behave similarly, risking treatment failure.
What this interaction means in plain words
Praziquantel and Rifapentine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Praziquantel belongs to Anti Parasitic; Rifapentine belongs to Anti Bacterial.
Why it happens
Rifapentine induces CYP3A4 and other enzymes, greatly increasing praziquantel clearance.
What to do
Avoid concurrent use; where possible give praziquantel after rifapentine has been stopped for several weeks. If unavoidable, monitor closely for efficacy and confirm cure.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Praziquantel
- Enzalutamide + Praziquantel Contraindicated
- Praziquantel + Rifampin Contraindicated
- Amobarbital + Praziquantel Major
- Apalutamide + Praziquantel Major
- Butabarbital + Praziquantel Major
- Butalbital + Praziquantel Major
Other interactions of Rifapentine
- Ledipasvir-sofosbuvir + Rifapentine Contraindicated
- Lorlatinib + Rifapentine Contraindicated
- Lurasidone + Rifapentine Contraindicated
- Ranolazine + Rifapentine Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir-voxilaprevir Contraindicated
Frequently asked questions
Can I take Praziquantel with Rifapentine?
MediHelp rates the interaction as major. Praziquantel and Rifapentine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Rifamycins strongly induce CYP3A4 and rifampicin markedly reduces praziquantel exposure to subtherapeutic levels. Rifapentine is expected to behave similarly, risking treatment failure.
How serious is the interaction between Praziquantel and Rifapentine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use; where possible give praziquantel after rifapentine has been stopped for several weeks. If unavoidable, monitor closely for efficacy and confirm cure.
What other medicines interact with Praziquantel?
MediHelp also lists interactions of Praziquantel with, for example, Enzalutamide, Rifampin, Amobarbital. The full list is on the Praziquantel page.
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