Clarithromycin increases cyclosporine concentrations. Clarithromycin increases digoxin concentrations. Fluconazole increases clarithromycin concentrations. Clarithromycin may increase phenytoin concentrations. Clarithromycin may increase pimozide concentrations.
Ritonavir increases clarithromycin concentrations.
Clarithromycin may increase terfenadine concentrations. Clarithromycin may increase theophylline concentrations. Clarithromycin increases triazolam concentrations. Clarithromycin may increase warfarin concentrations. Clarithromycin may increase zidovudine concentrations.