special subjects
Green Tea
Drug Interactions
Vitamin K ingreen teamay antagonize the anticoagulant effect ofwarfarin. Ifgreen teaconsumption is abruptly stopped,lithiumserum concentrations may increase andlithiumadverse effects may occur. Green teamay decrease blood levels ofnadolol, a beta blocker, as well as the antihyperlipidemic drugsatorvastatinandrosuvastatin. Green teamay also decrease absorption of iron andfolic acid. (See also table.) 