Drug interactions
Sodium nitroprusside + Tetracaine
Severity: Moderate
Sodium nitroprusside and Tetracaine: 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
Both nitroprusside and tetracaine can induce methemoglobinemia. Concurrent exposure may raise the risk, particularly with large mucosal applications or high nitroprusside doses.
What this interaction means in plain words
Sodium nitroprusside and Tetracaine 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.
Sodium nitroprusside belongs to Cardiovascular; Tetracaine belongs to Central Nervous System.
Why it happens
Additive oxidation of hemoglobin iron to the ferric state by nitroprusside and the local anesthetic.
What to do
Monitor for cyanosis, falling oxygen saturation and symptoms of methemoglobinemia, and check methemoglobin levels if suspected. Give methylene blue for symptomatic cases.
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 Sodium nitroprusside
Other interactions of Tetracaine
- Chloroquine + Tetracaine Moderate
- Dapsone + Tetracaine Moderate
- Isosorbide dinitrate + Tetracaine Moderate
- Isosorbide mononitrate + Tetracaine Moderate
- Nitrofurantoin + Tetracaine Moderate
- Nitroglycerin + Tetracaine Moderate
Frequently asked questions
Can I take Sodium nitroprusside with Tetracaine?
MediHelp rates the interaction as moderate. Sodium nitroprusside and Tetracaine 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. Both nitroprusside and tetracaine can induce methemoglobinemia. Concurrent exposure may raise the risk, particularly with large mucosal applications or high nitroprusside doses.
How serious is the interaction between Sodium nitroprusside and Tetracaine?
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 cyanosis, falling oxygen saturation and symptoms of methemoglobinemia, and check methemoglobin levels if suspected. Give methylene blue for symptomatic cases.
What other medicines interact with Sodium nitroprusside?
MediHelp also lists interactions of Sodium nitroprusside with, for example, Avanafil, Nitric oxide, Sildenafil. The full list is on the Sodium nitroprusside page.
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