“Compared with the animals in ribavirin group, silymarin significantly decreased the area under the plasma concentration‐time curve (AUC0–t) and the peak plasma concentration (Cmax) of ribavirin and ribavirin base by 31.2–44.5% and 48.9–50.0%, respectively.”
“This study indicates that the therapeutic efficacy of ribavirin may be compromised by the concurrent administration of herbal medicines/dietary supplements containing silymarin , glycyrrhizin, or oxymatrine.”