Drug interactions
Bretylium + Sodium nitroprusside
Severity: Moderate
Bretylium and Sodium nitroprusside: 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 agents can lower blood pressure, and bretylium also blunts compensatory sympathetic reflexes. Used together, they may cause deeper or more prolonged hypotension than either drug alone, particularly in volume-depleted or upright patients.
What this interaction means in plain words
Bretylium and Sodium nitroprusside 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
Additive hypotensive effects: nitroprusside causes direct vasodilation while bretylium causes adrenergic neuron blockade with orthostatic hypotension.
What to do
Monitor blood pressure continuously during nitroprusside infusion and titrate the dose to the target pressure. Correct volume depletion and be ready to reduce the infusion rate if hypotension develops.
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
Frequently asked questions
Can I take Bretylium with Sodium nitroprusside?
MediHelp rates the interaction as moderate. Bretylium and Sodium nitroprusside 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 agents can lower blood pressure, and bretylium also blunts compensatory sympathetic reflexes. Used together, they may cause deeper or more prolonged hypotension than either drug alone, particularly in volume-depleted or upright patients.
How serious is the interaction between Bretylium and Sodium nitroprusside?
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 blood pressure continuously during nitroprusside infusion and titrate the dose to the target pressure. Correct volume depletion and be ready to reduce the infusion rate if hypotension develops.
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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