Of the reported adverse events, only was described as severe. If CDAD is suspected or confirmed, ongoing antibiotic use not directed against. High tissue concentrations were achieved, but negligible accumulation was observed. When clarithromycin and terfenadine were coadministered, plasma concentrations of the active acid metabolite of terfenadine were threefold higher, on average, than the values observed when terfenadine was administered alone. Clarithromycin may be administered without dosage adjustment to clarithromycin overnatting patients with normal renal function taking ritonavir. Resistant These interpretive standards are applicable only to broth microdilution susceptibility tests with Haemophilus spp.