It can cause several side effects, including:
(Click Green Tea Side Effects to learn more, including potentially serious side effects that you should report immediately to your healthcare provider.)
It can potentially interact with several medications (see Green Tea Drug Interactions).
Normal consumption (through beverages) is probably safe for most people, but medicinal use can cause serious problems. Some people may be more likely to experience problems due to green tea. Therefore, you should talk with your healthcare provider prior to taking it medicinally if you have:
- High blood pressure (hypertension)
- Iron deficiency anemia
- Liver disease, such as liver failure, cirrhosis of the liver, or hepatitis
- Any heart problems
- Any allergies, including allergies to foods, dyes, or preservatives.
Also, let your healthcare provider know if you are:
- Pregnant or thinking of becoming pregnant (see Green Tea and Pregnancy)
- Breastfeeding (see Green Tea and Breastfeeding).
Make sure to tell your healthcare provider about all other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Is Green Tea Safe? for more information, including any available warnings and precautions.)