Drug interactions
Parecoxib + Phentolamine
Severity: Minor
Parecoxib 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
Parecoxib is converted to valdecoxib, a COX-2 inhibitor that can cause sodium and fluid retention and raise blood pressure. This may weaken the antihypertensive effect of phentolamine, though the effect is likely modest.
What this interaction means in plain words
Parecoxib 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
COX-2 inhibition reduces renal and vascular prostaglandins, causing fluid retention and opposing vasodilation.
What to do
Monitor blood pressure during parecoxib use with phentolamine and adjust antihypertensive therapy if needed.
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 Parecoxib with Phentolamine?
MediHelp rates the interaction as minor. Parecoxib 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. Parecoxib is converted to valdecoxib, a COX-2 inhibitor that can cause sodium and fluid retention and raise blood pressure. This may weaken the antihypertensive effect of phentolamine, though the effect is likely modest.
How serious is the interaction between Parecoxib 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 during parecoxib use with phentolamine and adjust antihypertensive therapy if needed.
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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