Despite the high number of complications related to cardiac problems that suspension of these drugs causes, this urological intervention, carried out during dual antithrombotic therapy, was feasible and without major complications. Given the high proportion of complications due to clot-related urinary retention, it is advisable to leave the urinary catheter in place for a longer period.

The effect of ketoconazole (200 mg/d orally for 10 days) on the plasma concentrations of carbamazepine (CBZ) and its active metabolite carbamazepine-10,11-epoxide (CBZ-E) was assessed in eight patients with epilepsy stabilized on CBZ therapy. Administration of ketoconazole was associated with a significant increase in plasma CBZ concentrations (from 5.6 +/- 1.9 to 7.2 +/- 2.9 micrograms/ml on day 10 [means +/- SD, P < 0.02]), whereas plasma concentrations of CBZ-E were unchanged. After ketoconazole was discontinued, plasma CBZ levels decreased to pretreatment values. This interaction was probably mediated by an inhibiting action of ketoconazole on cytochrome CYP3A4, the main enzyme responsible for CBZ metabolism.

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