Drug interactions
Dopexamine + Phentolamine
Severity: Moderate
Dopexamine and Phentolamine: 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
Dopexamine is a beta-2 and dopaminergic agonist that causes vasodilation and tachycardia. Combined with phentolamine's alpha-blockade, it may produce marked hypotension and reflex tachycardia.
What this interaction means in plain words
Dopexamine and Phentolamine 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 vasodilation from alpha-blockade and beta-2 agonism, with reflex sympathetic activation.
What to do
Monitor blood pressure, heart rate and ECG continuously, and reduce infusion rates if hypotension or tachycardia 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 Phentolamine
Frequently asked questions
Can I take Dopexamine with Phentolamine?
MediHelp rates the interaction as moderate. Dopexamine and Phentolamine 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. Dopexamine is a beta-2 and dopaminergic agonist that causes vasodilation and tachycardia. Combined with phentolamine's alpha-blockade, it may produce marked hypotension and reflex tachycardia.
How serious is the interaction between Dopexamine and Phentolamine?
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, heart rate and ECG continuously, and reduce infusion rates if hypotension or tachycardia develops.
What other medicines interact with Phentolamine?
MediHelp also lists interactions of Phentolamine with, for example, Alfuzosin, Avanafil, Doxazosin. The full list is on the Phentolamine page.
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