Drug interactions
Nitroprusside + Tadalafil
Severity: Major
Nitroprusside and Tadalafil: major 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
Nitroprusside releases nitric oxide, and tadalafil prolongs the cGMP signalling that nitric oxide triggers. Together they may produce profound and sudden hypotension.
What this interaction means in plain words
Nitroprusside and Tadalafil 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.
Why it happens
Nitroprusside-derived nitric oxide raises cGMP while tadalafil blocks its breakdown through PDE5 inhibition, giving synergistic vasodilation.
What to do
Avoid giving nitroprusside to patients who have recently taken tadalafil, whose effect persists for roughly two days or more. If unavoidable, use continuous intra-arterial or close hemodynamic monitoring and titrate cautiously.
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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Other interactions of Tadalafil
- Amyl nitrite + Tadalafil Contraindicated
- Isosorbide dinitrate + Tadalafil Contraindicated
- Isosorbide mononitrate + Tadalafil Contraindicated
- Nitroglycerin po + Tadalafil Contraindicated
- Nitroglycerin rectal + Tadalafil Contraindicated
- Nitroglycerin sublingual + Tadalafil Contraindicated
Frequently asked questions
Can I take Nitroprusside with Tadalafil?
MediHelp rates the interaction as major. Nitroprusside and Tadalafil 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. Nitroprusside releases nitric oxide, and tadalafil prolongs the cGMP signalling that nitric oxide triggers. Together they may produce profound and sudden hypotension.
How serious is the interaction between Nitroprusside and Tadalafil?
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 giving nitroprusside to patients who have recently taken tadalafil, whose effect persists for roughly two days or more. If unavoidable, use continuous intra-arterial or close hemodynamic monitoring and titrate cautiously.
What other medicines interact with Tadalafil?
MediHelp also lists interactions of Tadalafil with, for example, Amyl nitrite, Isosorbide dinitrate, Isosorbide mononitrate. The full list is on the Tadalafil page.
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