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Related Experiment Videos

Study on the possible interaction between tenoxicam and furosemide.

D Hartmann1, C H Kleinbloesem, P W Lücker

  • 1Pharma Clinical Research Department, F. Hoffmann-La Roche & Co. Ltd., Basle, Switzerland.

Arzneimittel-Forschung
|September 1, 1987
PubMed
Summary

This study found that tenoxicam, a non-steroidal anti-inflammatory drug, did not significantly alter furosemide excretion or vital signs in patients with heart insufficiency. However, tenoxicam did significantly reduce prostaglandin E2 levels, indicating a direct effect on renal prostaglandin synthesis.

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Area of Science:

  • Pharmacology
  • Nephrology
  • Cardiology

Background:

  • Patients with heart insufficiency often require anti-inflammatory treatment.
  • Non-steroidal anti-inflammatory drugs (NSAIDs) can interact with diuretics like furosemide.
  • Understanding these interactions is crucial for patient safety and treatment efficacy.

Purpose of the Study:

  • To investigate the potential interaction between furosemide and tenoxicam in patients with mild heart insufficiency.
  • To assess the impact of concurrent tenoxicam administration on furosemide pharmacokinetics and renal function.
  • To evaluate the effect of tenoxicam on prostaglandin E2 excretion.

Main Methods:

  • A 15-day study involving 12 patients with mild heart insufficiency.
  • Patients received daily furosemide, with tenoxicam added from day 6 to 13.

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  • Measurements included vital signs, urinary excretion of electrolytes and biochemical markers, furosemide excretion profiles, and tenoxicam plasma levels.

    • Main Results:

    • Tenoxicam did not significantly affect vital parameters (blood pressure, heart rate, ECG, body weight).
    • Urinary excretion of sodium and chloride showed a non-significant decreasing trend during tenoxicam treatment.
    • Tenoxicam significantly reduced prostaglandin E2 (PGE2) excretion in urine, suggesting a direct effect on renal prostaglandin synthesis. Furosemide excretion remained unchanged.

    Conclusions:

    • Concurrent administration of tenoxicam with furosemide in patients with mild heart insufficiency does not appear to alter furosemide's excretion profile or affect vital signs.
    • Tenoxicam significantly reduces renal prostaglandin E2 synthesis, a known mechanism for NSAID effects.
    • The study did not reveal evidence of acute renal impairment from the combined treatment.