Drug interactions
Acetylsalicylic acid + Prazosin
Severity: Minor
Acetylsalicylic acid and Prazosin: 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
Aspirin may modestly reduce the antihypertensive effect of prazosin, though the evidence is weak. The effect is mostly relevant with regular high-dose use.
What this interaction means in plain words
Acetylsalicylic acid and Prazosin 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; Prazosin belongs to Genitourinary.
Why it happens
Inhibition of vasodilatory prostaglandins and sodium retention may partially oppose alpha-blocker effects.
What to do
No routine adjustment is needed. Monitor blood pressure if high-dose aspirin is started or stopped.
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 Prazosin
- Alfuzosin + Prazosin Major
- Amifostine + Prazosin Major
- Avanafil + Prazosin Major
- Doxazosin + Prazosin Major
- Dutasteride-tamsulosin + Prazosin Major
- Phenoxybenzamine + Prazosin Major
Frequently asked questions
Can I take Acetylsalicylic acid with Prazosin?
MediHelp rates the interaction as minor. Acetylsalicylic acid and Prazosin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Aspirin may modestly reduce the antihypertensive effect of prazosin, though the evidence is weak. The effect is mostly relevant with regular high-dose use.
How serious is the interaction between Acetylsalicylic acid and Prazosin?
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 adjustment is needed. Monitor blood pressure if high-dose aspirin is started or stopped.
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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