Abstract
In the present investigation it was aimed to evaluate any possible pharmacokinetic interactions between Phenytoin and Rivaroxaban. Study was conducted in Male Wistar rats; animals were divided into three groups. Group 1 received Phenytoin alone, Group 2 received Rivaroxaban alone and Group 3 received Phenytoin and Rivaroxaban concomitantly. The treatment was given for 8 days and the blood samples were collected on day 1 and day 8. The samples were analyzed by HPLC. The results were showed no significant difference in the Pharmacokinetic parameters of Phenytoin in presence of Rivaroxaban. Whereas Rivaroxaban showed significant decrease in both Cmax and tmax in combination with Phenytoin. Phenytoin is a combined-gp inducer and strong CYP3A4 inducer therefore it may induce the metabolism of Rivaroxaban so it reduces the concentrations and increase the elimination rate. Based on the results obtained from pharmacokinetic study it was evident that the single dose of Rivaroxaban in combination with Phenytoin shows statistically significant interactions in its pharmacokinetic parameters.
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