Drug Interactions between Reyataz and thiabendazole
This report displays the potential drug interactions for the following 2 drugs:
- Reyataz (atazanavir)
- thiabendazole
Interactions between your drugs
thiabendazole atazanavir
Applies to: thiabendazole and Reyataz (atazanavir)
According to the product labeling, clinically significant interactions are not expected between atazanavir and substrates of CYP450 1A2, 2A6, 2B6, 2C19, 2C9, 2D6, or 2E1. No particular precaution or dosage adjustment should be necessary.
References
- (2003) "Product Information. Reyataz (atazanavir)." Bristol-Myers Squibb
Drug and food interactions
atazanavir food
Applies to: Reyataz (atazanavir)
ADJUST DOSING INTERVAL: Administration of atazanavir with food enhances oral bioavailability and reduces pharmacokinetic variability. According to the manufacturer, administration with a light meal increased the peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of a single 400 mg dose of atazanavir by 57% and 70%, respectively, relative to the fasting state. Administration with a high-fat meal resulted in a mean increase of 35% in atazanavir AUC and no change in Cmax compared to fasting. The coefficient of variation of AUC and Cmax decreased by approximately one-half when given with either a light or high-fat meal compared to the fasting state.
MANAGEMENT: To ensure maximal oral absorption, atazanavir should be administered with or immediately after a meal.
References
- (2003) "Product Information. Reyataz (atazanavir)." Bristol-Myers Squibb
thiabendazole food
Applies to: thiabendazole
MONITOR: Coadministration with thiabendazole may increase the plasma concentrations of caffeine. The mechanism is thiabendazole inhibition of the CYP450 1A2 metabolism of caffeine. In ten healthy, nonsmoking volunteers, administration of a single 136.5 mg dose of caffeine in combination with a single 500 mg dose of thiabendazole resulted in a nearly 60% increase in the area under the plasma concentration-time curve (AUC) of caffeine compared to administration without thiabendazole. In addition, the half-life of caffeine was increased from 11.9 to 28.6 hours, and oral clearance was reduced by 67% during coadministration with thiabendazole. The formation of paraxanthine from caffeine, which is primarily mediated by CYP450 1A2, was almost completely abolished until after the thiabendazole was cleared from the system.
MANAGEMENT: Patients should be advised that pharmacologic effects of caffeine may be increased during coadministration with thiabendazole.
References
- Bapiro TE, Sayi J, Hasler JA, et al. (2005) "Artemisinin and thiabendazole are potent inhibitors of cytochrome P450 1A2 (CYP1A2) activity in humans." Eur J Clin Pharmacol, 61, p. 755-61
Therapeutic duplication warnings
No 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.
See also
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. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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