Green tea contains caffeine and it has been used to increase alertness. Green tea has also been used to reduce the risk of cancer, to lower cholesterol, and to reduce the risk or delay Parkinson's disease.Some herbal/diet supplement products have been found to contain possibly harmful impurities/additives. Check with your pharmacist for more details regarding the particular brand you use.The FDA has not reviewed this product for safety or effectiveness. Consult your doctor or pharmacist for more details.
How to use Green Tea Extract
If you suddenly stop using this medication, you may have withdrawal symptoms (such as headache, mental/mood changes such as irritability/nervousness). To help prevent withdrawal, your doctor may lower your dose slowly. Withdrawal is more likely if you have used green tea for a long time or in high doses. Tell your doctor or pharmacist right away if you have withdrawal.
If your condition lasts or gets worse, or if you think you may have a serious medical problem, get medical help right away.
Tell your doctor right away if you have any serious side effects, including: fast/irregular heartbeat, mental/mood changes (such as nervousness, confusion), trouble sleeping, restlessness, shakiness (tremor), seizures, signs of liver problems (such as nausea/vomiting that doesn't stop, loss of appetite, stomach/abdominal pain, yellowing eyes/skin, dark urine).
A very serious allergic reaction to this product is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: 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 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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 (such as irregular heartbeat, recent heart attack), stomach/intestinal problems (such as ulcers, reflux disease-GERD), liver problems, mental/mood disorder (such as 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.
Children may be more sensitive to the side effects of this product, especially the effects of caffeine in this product.
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.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Check the labels on all your medicines (such as cough-and-cold products, diet aids, headache medicines) because they may contain caffeine or other stimulants (such as ephedra/ma huang, phenylpropanolamine) that could increase your heart rate or blood pressure. Ask your pharmacist about using those products safely.
This product may interfere with certain medical/lab tests (such as chemical stress tests using adenosine/dipyridamole, urine tests for calcium/catecholamines, lung function test), possibly causing false test results. Make sure lab personnel and all your doctors know you use this product.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: seizures, irregular heartbeat.
Keep all medical and lab appointments.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
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.