Drug Interaction Report
1 potential interaction and/or warning found for the following 2 drugs:
- fenofibrate
- torsemide
Interactions between your drugs
torsemide fenofibrate
Applies to: torsemide, fenofibrate
MONITOR: Coadministration with inhibitors of CYP450 2C9 may increase the plasma concentrations of torsemide. The interaction has not been evaluated in pharmacokinetic studies; however, torsemide has been shown to undergo metabolism by CYP450 2C9.
MANAGEMENT: Caution is advised when torsemide is prescribed with CYP450 2C9 inhibitors. Patients should be monitored for potentially increased adverse effects such as dehydration, hypotension, electrolyte imbalances, hyperglycemia, tinnitus, and hearing loss.
References (4)
- "Product Information. Demadex (torsemide)." Boehringer Mannheim
- Miners JO, Rees DLP, Valente L, Veronese ME, Birkett DJ (1995) "Human hepatic cytochrome p450 2c9 catalyzes the rate-limiting pathway of torsemide metabolism." J Pharmacol Exp Ther, 272, p. 1076-81
- Miners JO, Birkett DJ (1998) "Cytochrome P4502C9: an enzyme of major importance in human drug metabolism." Br J Clin Pharmacol, 45, p. 525-38
- Vormfelde SV, Engelhardt S, Zirk A, et al. (2004) "CYP2C9 polymorphisms and the interindividual variability in pharmacokinetics and pharmacodynamics of the loop diuretic drug torsemide." Clin Pharmacol Ther, 76, p. 557-66
Drug and food interactions
No alcohol/food interactions were found with the drugs in your list. However, this does not necessarily mean no food interactions exist. Always consult your healthcare provider.
Therapeutic duplication warnings
No duplication warnings were found for your selected drugs.
Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
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Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
| No interaction information available. |
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