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Green Tea Oral Precautions and Side Effects


IMPORTANT NOTE: The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate or effective for you. Consult your healthcare professional before using this drug.

Table of Contents

Generic Name: GREEN TEA (Camellia sinensis) - ORAL

Green Tea Oral Precautions

Before taking green tea, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

If you have any of the following health problems, consult your doctor or pharmacist before using this product:

  • anemia (iron deficiency anemia)
  • bleeding problems
  • diabetes
  • a certain eye condition (glaucoma)
  • heart problems (e.g., irregular heartbeat, recent heart attack)
  • stomach/intestinal problems (e.g., ulcers, reflux disease-GERD)
  • liver problems
  • mental/mood disorder (e.g., anxiety, panic attacks)
  • low levels of calcium in the blood
  • bone problems such as osteoporosis

Liquid preparations of this product may contain sugar and/or alcohol. Caution is advised if you have diabetes, alcohol dependence, or liver disease. Ask your doctor or pharmacist about using this product safely.

Caution is advised when using this drug in children because they may be more sensitive to the effects of caffeine.

During pregnancy, consult your doctor before using this product. Green tea contains caffeine. It is recommended that women limit caffeine during pregnancy. This product may also decrease folic acid. Discuss the risks and benefits with your doctor.

This product may pass into breast milk and have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

Green Tea Oral Side Effects

Nausea, diarrhea, upset stomach, headache, and dizziness may occur. If any of these effects persist or worsen, contact your doctor promptly.

Tell your doctor immediately if any of these unlikely but serious side effects occur:

  • fast/irregular heartbeat
  • mental/mood changes (e.g., nervousness, confusion)
  • trouble sleeping
  • restlessness
  • shakiness (tremor)
  • seizures

A very serious allergic reaction to this product is rare. However, seek immediate medical attention if you notice any of the following symptoms of a serious allergic reaction:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.



CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.
Information last revised May 2010 Copyright(c) 2010 First DataBank, Inc.