Drug interactions
Nevirapine + Sildenafil
Severity: Moderate
Nevirapine and Sildenafil: 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
Nevirapine induces CYP3A4 and may reduce sildenafil concentrations, potentially lessening its efficacy.
What this interaction means in plain words
Nevirapine and Sildenafil 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.
Nevirapine belongs to Anti Virals; Sildenafil belongs to Genitourinary.
Why it happens
Nevirapine induces CYP3A4, increasing sildenafil metabolic clearance.
What to do
Monitor for reduced response to sildenafil and adjust the dose or select an alternative if needed.
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 Sildenafil
- Amyl nitrite + Sildenafil Contraindicated
- Atazanavir + Sildenafil Contraindicated
- Cobicistat + Sildenafil Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Sildenafil Contraindicated
- Glyceryl trinitrate pr + Sildenafil Contraindicated
- Isosorbide dinitrate + Sildenafil Contraindicated
Other interactions of Nevirapine
- Elbasvir / grazoprevir + Nevirapine Contraindicated
- Nevirapine + Ranolazine Contraindicated
- Nevirapine + St john's wort Contraindicated
- Abemaciclib + Nevirapine Major
- Acalabrutinib + Nevirapine Major
- Amobarbital + Nevirapine Major
Frequently asked questions
Can I take Nevirapine with Sildenafil?
MediHelp rates the interaction as moderate. Nevirapine and Sildenafil 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. Nevirapine induces CYP3A4 and may reduce sildenafil concentrations, potentially lessening its efficacy.
How serious is the interaction between Nevirapine and Sildenafil?
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 reduced response to sildenafil and adjust the dose or select an alternative if needed.
What other medicines interact with Sildenafil?
MediHelp also lists interactions of Sildenafil with, for example, Amyl nitrite, Atazanavir, Cobicistat. The full list is on the Sildenafil page.
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