Erythromycin did not produce any increase in rosuvastatin plasma exposure. This indicates that CYP3A4 metabolism is not an important clearance mechanism for rosuvastatin, a result consistent with previous findings. The small decreases in rosuvastatin AUC((0-t)) and C(max) that occurred as a consequence of short-term treatment with erythromycin are unlikely to have relevance to long-term treatment with rosuvastatin.
Itraconazole produced modest increases in rosuvastatin plasma concentrations, which are unlikely to be of clinical relevance. The results support previous in vitro metabolism findings that CYP3A4 plays a minor role in the limited metabolism of rosuvastatin.
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