Drug interactions
Praziquantel + Saquinavir
Severity: Moderate
Praziquantel and Saquinavir: moderate interaction.
Last updated
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
Saquinavir, given with ritonavir, inhibits CYP3A4 and can raise praziquantel exposure. Saquinavir may also prolong QT interval, so tolerability monitoring is worthwhile.
What this interaction means in plain words
Praziquantel and Saquinavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Boosted saquinavir inhibits CYP3A4 metabolism of praziquantel.
What to do
Monitor for praziquantel adverse effects such as dizziness and sedation. Counsel about driving; no empiric dose change is needed for a short course.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Praziquantel
- Enzalutamide + Praziquantel Contraindicated
- Praziquantel + Rifampin Contraindicated
- Amobarbital + Praziquantel Major
- Apalutamide + Praziquantel Major
- Butabarbital + Praziquantel Major
- Butalbital + Praziquantel Major
Frequently asked questions
Can I take Praziquantel with Saquinavir?
MediHelp rates the interaction as moderate. Praziquantel and Saquinavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Saquinavir, given with ritonavir, inhibits CYP3A4 and can raise praziquantel exposure. Saquinavir may also prolong QT interval, so tolerability monitoring is worthwhile.
How serious is the interaction between Praziquantel and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for praziquantel adverse effects such as dizziness and sedation. Counsel about driving; no empiric dose change is needed for a short course.
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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