Drug interactions
Guanfacine + Sodium nitroprusside
Severity: Moderate
Guanfacine 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
Guanfacine lowers blood pressure through central sympatholytic action and may add to the profound vasodilation of nitroprusside. This can cause excessive hypotension or bradycardia.
What this interaction means in plain words
Guanfacine 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.
Guanfacine belongs to Cardiovascular; Sodium nitroprusside belongs to Cardiovascular.
Why it happens
Additive hypotensive effects from central alpha-2 agonism and direct nitric oxide mediated vasodilation.
What to do
Monitor blood pressure continuously during nitroprusside infusion in patients taking guanfacine. Titrate nitroprusside cautiously.
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 Guanfacine
- Clonidine + Guanfacine Major
- Guanfacine + Lofexidine Major
- Aldesleukin + Guanfacine Moderate
- Amiodarone + Guanfacine Moderate
- Amisulpride + Guanfacine Moderate
- Amitriptyline + Guanfacine Moderate
Frequently asked questions
Can I take Guanfacine with Sodium nitroprusside?
MediHelp rates the interaction as moderate. Guanfacine 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. Guanfacine lowers blood pressure through central sympatholytic action and may add to the profound vasodilation of nitroprusside. This can cause excessive hypotension or bradycardia.
How serious is the interaction between Guanfacine 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 in patients taking guanfacine. Titrate nitroprusside cautiously.
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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