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Clinical Trial
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Celecoxib, a specific COX-2 inhibitor, has no significant effect on methotrexate pharmacokinetics in patients with rheumatoid arthritis.
Journal of Rheumatology 1999 December
OBJECTIVE: To determine the effects of celecoxib, a specific inhibitor of cyclooxygenase 2 (COX-2) on the renal clearance and plasma pharmacokinetic profile of stable methotrexate (MTX) doses in patients with rheumatoid arthritis (RA).
METHODS: Fourteen adult female patients with RA taking a stable weekly dose of MTX (5 to 15 mg/wk) for a minimum of 3 months were randomized to receive concomitantly either celecoxib (200 mg BID) or placebo for a period of 7 days in a single blind, 2 period crossover study of MTX pharmacokinetics and renal clearance.
RESULTS: The plasma pharmacokinetic profile of MTX did not change significantly when celecoxib or a placebo was coadministered. The mean renal clearance of MTX alone, 7.98+/-2.18 l/h, was virtually unchanged by coadministration of celecoxib (7.94+/-1.61 l/h) or placebo (7.97+/-1.19 l/h).
CONCLUSION: Celecoxib has no significant effect on the pharmacokinetics or renal clearance of MTX in patients with RA, although these results should be confirmed in prospective studies of elderly and renally impaired patients.
METHODS: Fourteen adult female patients with RA taking a stable weekly dose of MTX (5 to 15 mg/wk) for a minimum of 3 months were randomized to receive concomitantly either celecoxib (200 mg BID) or placebo for a period of 7 days in a single blind, 2 period crossover study of MTX pharmacokinetics and renal clearance.
RESULTS: The plasma pharmacokinetic profile of MTX did not change significantly when celecoxib or a placebo was coadministered. The mean renal clearance of MTX alone, 7.98+/-2.18 l/h, was virtually unchanged by coadministration of celecoxib (7.94+/-1.61 l/h) or placebo (7.97+/-1.19 l/h).
CONCLUSION: Celecoxib has no significant effect on the pharmacokinetics or renal clearance of MTX in patients with RA, although these results should be confirmed in prospective studies of elderly and renally impaired patients.
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