Does drinking tea while taking medication affect the drug's effectiveness?

In general, taking medication with tea may affect the drug's effectiveness. If any discomfort occurs, it is advisable to seek medical attention promptly. The specific reasons are as follows:

Tea contains various components such as tea polyphenols, caffeine, and tannic acid. These substances may interact with certain ingredients in medications, thereby affecting the absorption, metabolism, and stability of the drugs. For example, antibiotics or antiviral drugs may have reduced activity when combined with tea polyphenols; taking antihypertensive or hypoglycemic drugs together with caffeine may interfere with drug absorption; medications containing iron or calcium taken with tannic acid may form insoluble precipitates, reducing the drugs' bioavailability. Therefore, to avoid potential interference from tea, it is recommended to take medications with plain water and follow medical instructions carefully to ensure optimal therapeutic effects.

During medication treatment, a light diet is recommended, along with adequate nutritional intake. If drinking tea, opt for weak, lightly concentrated tea to avoid impairing drug absorption.