Drug interactions
Ethanol + Phentolamine
Severity: Moderate
Ethanol 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
Alcohol causes vasodilation and may add to the hypotensive effect of phentolamine, leading to dizziness or fainting.
What this interaction means in plain words
Ethanol 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 and hypotensive effects.
What to do
Advise patients to avoid or limit alcohol while receiving phentolamine and to rise slowly. Monitor blood pressure if alcohol is used.
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 Ethanol with Phentolamine?
MediHelp rates the interaction as moderate. Ethanol 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. Alcohol causes vasodilation and may add to the hypotensive effect of phentolamine, leading to dizziness or fainting.
How serious is the interaction between Ethanol 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: Advise patients to avoid or limit alcohol while receiving phentolamine and to rise slowly. Monitor blood pressure if alcohol is used.
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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