Drug interactions
Acetylsalicylic acid + Phentolamine
Severity: Minor
Acetylsalicylic acid 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
Whether aspirin meaningfully blunts the blood pressure effect of phentolamine is largely theoretical. Any effect would be small, and low-dose aspirin is unlikely to matter.
What this interaction means in plain words
Acetylsalicylic acid 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.
Acetylsalicylic acid belongs to Musculoskeletal; Phentolamine belongs to Cardiovascular.
Why it happens
Prostaglandin inhibition by aspirin may theoretically offset some vasodilation, but this is not well established.
What to do
No routine change is needed. Check blood pressure response if high-dose aspirin is used regularly.
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 Acetylsalicylic acid
- Acetylsalicylic acid + Ketorolac Contraindicated
- Acetylsalicylic acid + Ketorolac intranasal Contraindicated
- Abciximab + Acetylsalicylic acid Major
- Acemetacin + Acetylsalicylic acid Major
- Acetazolamide + Acetylsalicylic acid Major
- Acetylsalicylic acid + Alteplase Major
Other interactions of Phentolamine
Frequently asked questions
Can I take Acetylsalicylic acid with Phentolamine?
MediHelp rates the interaction as minor. Acetylsalicylic acid 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. Whether aspirin meaningfully blunts the blood pressure effect of phentolamine is largely theoretical. Any effect would be small, and low-dose aspirin is unlikely to matter.
How serious is the interaction between Acetylsalicylic acid 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: No routine change is needed. Check blood pressure response if high-dose aspirin is used regularly.
What other medicines interact with Acetylsalicylic acid?
MediHelp also lists interactions of Acetylsalicylic acid with, for example, Ketorolac, Ketorolac intranasal, Abciximab. The full list is on the Acetylsalicylic acid page.
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