Atenolol and Parecoxib: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 15, 2026 · Source data updated Jul 11, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Atenolol
Parecoxib
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Here's what's going on. Atenolol (Tenormin) is a beta blocker that helps lower your blood pressure. Parecoxib is an anti-inflammatory painkiller (an NSAID). When you use them together, the NSAID can make the atenolol work a little less well, so your blood pressure may not stay as low as it should.
This happens because NSAIDs reduce certain natural substances in your kidneys that help control blood pressure and fluid. The effect builds up over time rather than right away. The good news is this is easy to keep an eye on. Your care team can simply check your blood pressure and adjust things if needed, so keep taking both as prescribed and mention any concerns to your pharmacist or doctor.
Effect: NSAIDs, including parecoxib, may attenuate the antihypertensive efficacy of atenolol.
Mechanism: Inhibition of renal prostaglandin synthesis reduces vasodilation and promotes sodium/fluid retention, blunting beta-blocker BP control. This is a PD interaction; neither agent's metabolism drives it.
- Direction: reduced atenolol antihypertensive effect (possible BP rise)
- Onset: delayed
- Evidence: probable (class effect documented for several NSAIDs; sulindac may be less antagonistic)
- Magnitude: variable, not well quantified for parecoxib specifically
Management: Monitor blood pressure during concomitant use; individualize antihypertensive therapy as needed.
What happens
Reduced antihypertensive effect
Interaction Deep Dive
Using NSAIDs together with beta-adrenergic blocking agents can raise blood pressure and hinder the ability to control it94. Such an outcome has been documented with flurbiprofen (400 mg per day), ibuprofen (in excess of 400 mg per day), indomethacin (in excess of 50 mg per day), naproxen (1000 mg per day), and piroxicam6510. In contrast, sulindac may not counteract the antihypertensive action of beta-blockers1110. When NSAIDs and beta blockers must be taken together, blood pressure should be monitored14.
Why it happens (mechanism)
Decreased production of renal prostaglandins
How to manage this interaction
The main step here is monitoring. This interaction is manageable, and your care team can handle it by keeping an eye on your numbers and tailoring your treatment if needed.
- Keep taking both medications exactly as prescribed unless your prescriber tells you otherwise.
- Expect your care team to check your blood pressure more closely, especially since parecoxib is usually used short-term after procedures.
- Your blood pressure medication dose may need to be adjusted and individualized by your care team.
What to raise: Tell your pharmacist or doctor if you notice higher blood pressure readings, headaches, or swelling, and ask before adding other over-the-counter NSAIDs like ibuprofen or naproxen.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
4 reports — tap to read
a) Hypertensive patients continuing their usual medications received ibuprofen 400 mg orally every 8 hours, acetaminophen, or placebo. After the 3-week trial concluded, patients treated with ibuprofen demonstrated rises of about 6 mmHg across several blood pressure measurements. Acetaminophen produced no detectable effect on blood pressure. The proposed mechanism may involve a reduction in the effectiveness of antihypertensive drugs due to interference with the production of vasodilator and natriuretic prostaglandins that antihypertensive agents stimulate. Diminished sodium excretion may have contributed to worsening the hypertension 5.
b) The influence of naproxen and sulindac on blood pressure response was investigated in 28 patients with mild to moderate essential hypertension that was well controlled with atenolol. The findings of this 5-week, double-blind, placebo-controlled trial showed that 1 week of treatment with naproxen 500 mg twice daily significantly raised systolic blood pressure (mean 4 mmHg) but did not change diastolic blood pressure. Sulindac 200 mg twice daily for 1 week changed neither blood pressure measure 6.
c) The effects of indomethacin were assessed in 16 patients with essential hypertension who were being treated with oxprenolol. Indomethacin and oxprenolol individually, as well as the combination of the two drugs, suppressed plasma renin activity. With the two drugs given together, blood pressure fell (systolic: -5.9 mmHg; diastolic: -4 mmHg; mean: -4.6 mmHg), but these blood pressure changes were roughly 50% smaller than those observed during the period when oxprenolol was given alone 7.
d) In a single-blind study, giving oral naproxen 500 mg twice daily or oral sulindac 200 mg twice daily at the same time had no effect on blood pressure control in patients with mild to moderate hypertension that was controlled with oral propranolol 10 mg to 240 mg daily. Serum propranolol concentrations were not measured, and patients with preexisting renal disease, heart failure, or cirrhosis were not included in the study 8.
Common questions
Can I take Atenolol and Parecoxib together?
Parecoxib can slightly reduce how well atenolol controls your blood pressure, so your care team should monitor your blood pressure while you use both. Keep taking both as prescribed and report any high readings. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Atenolol and Parecoxib interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "delayed". Effects tend to build up gradually over days to weeks.
How is the Atenolol and Parecoxib interaction managed?
The main step here is monitoring. This interaction is manageable, and your care team can handle it by keeping an eye on your numbers and tailoring your treatment if needed. Keep taking both medications exactly as prescribed unless your prescriber tells you otherwise. Expect your care team to check your blood pressure more closely, especially since parecoxib is usually used short-term after procedu… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
Questions for your pharmacist
- Does my dose of Atenolol or Parecoxib need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (11)
- Product Information: ZORVOLEX(R) oral capsules, diclofenac oral capsules. Iroko Pharmaceuticals, LLC (per FDA), Philadelphia, PA, 2016. DailyMed
- Product Information: ANAPROX(R) DS oral tablets, naproxen sodium oral tablets. Canton Laboratories, LLC (per FDA), Alpharetta, GA, 2016. DailyMed
- Product Information: CALDOLOR(R) intravenous injection, ibuprofen intravenous injection. Cumberland Pharmaceuticals Inc. (per FDA), Nashville, TN, 2016. DailyMed
- Product Information: COMBOGESIC(R) oral tablets, acetaminophen ibuprofen oral tablets. AFT Pharmaceuticals Inc (per FDA), Highland, MD, 2023. DailyMed
- Radack KL, Deck CC, & Bloomfield SS: Ibuprofen interferes with the efficacy of antihypertensive drugs. A randomized, double-blind, placebo-controlled trial of ibuprofen compared with acetaminophen. Ann Intern Med 1987; 107:628-635. PubMed
- Abate MA, Layne RD, Neely JL, et al: Effect of naproxen and sulindac on blood pressure response to atenolol. Drug Intell Clin Pharm 1990; 24:810-813. DOI
- Salvetti A, Arzilli F, Pedrinelli R, et al: Interaction between oxprenolol and indomethacin on blood pressure in essential hypertensive patients. Eur J Clin Pharmacol 1982; 22:197-201. DOI
- Schuna AA, Vejraska BD, Hiatt JG, et al: Lack of interaction between sulindac or naproxen and propranolol in hypertensive patients. J Clin Pharmacol 1989; 29:524-528. PubMed
- Product Information: VIMOVO(TM) delayed release oral tablets, naproxen and esomeprazole magnesium delayed release oral tablets. AstraZeneca LPW, Wilmington, DE, 2010. DailyMed
- Salvetti A, Pedrinelli R, Alberici P, et al: The influence of indomethacin and sulindac on some pharmacological actions of atenolol in hypertensive patients. Br J Clin Pharmacol 1984; 17(suppl):108S-111S. PubMed
- Abate MA, Neely JL, Layne RD, et al: Interaction of indomethacin and sulindac with labetolol. Br J Clin Pharmacol 1991; 31:363-366.
Keep reading about Atenolol
Keep reading about Parecoxib
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