Drug interactions
Aspirin rectal + Phentolamine
Severity: Minor
Aspirin rectal and Phentolamine: minor 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
Rectal aspirin is absorbed systemically and, at analgesic doses, may blunt the blood pressure lowering effect of vasodilators. The effect with phentolamine is expected to be small.
What this interaction means in plain words
Aspirin rectal and Phentolamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Inhibition of vasodilatory prostaglandin synthesis by aspirin may oppose phentolamine's vasodilation.
What to do
Monitor blood pressure if regular analgesic doses of aspirin are used with phentolamine, and adjust phentolamine if control worsens.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Phentolamine
Frequently asked questions
Can I take Aspirin rectal with Phentolamine?
MediHelp rates the interaction as minor. Aspirin rectal and Phentolamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rectal aspirin is absorbed systemically and, at analgesic doses, may blunt the blood pressure lowering effect of vasodilators. The effect with phentolamine is expected to be small.
How serious is the interaction between Aspirin rectal and Phentolamine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure if regular analgesic doses of aspirin are used with phentolamine, and adjust phentolamine if control worsens.
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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