Green Tea Extract Side Effects

Green tea extract side effects

Generic Name: green tea (Not applicable.)
Brand Name: Generics only. No brands available.

Green tea is used for:

Energy, to decrease sleepiness, and for stomach upset. Green tea may also help control cholesterol levels and has been used for certain types of cancer or other diseases. It may have other uses as well. Check with your pharmacist for more details regarding the particular brand you use.

Green tea is an herbal product. It works by increasing antioxidant activity in the body. It also contains caffeine, which increases the activity of the nervous system.

Do NOT use green tea if:

  • you are allergic to any ingredient in green tea
  • you are taking a blood thinner (eg, warfarin)

Contact your doctor or health care provider right away if any of these apply to you.

Before using green tea:

Some medical conditions may interact with green tea. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have heart disease; stomach problems, including an ulcer; or any emotional or mood conditions (eg, depression, anxiety)

Some MEDICINES MAY INTERACT with green tea. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Warfarin because side effects, including risk of bleeding, may be increased by green tea

This may not be a complete list of all interactions that may occur. Ask your health care provider if green tea may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use green tea:

Use green tea as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Dosing depends on the use and the source of the product.
  • Use as directed on the package, unless instructed otherwise by your doctor.
  • If you miss taking a dose of green tea for 1 or more days, there is no cause for concern. If your doctor recommended that you take it, try to remember your dose every day.

Ask your health care provider any questions you may have about how to use green tea.

Important safety information:

  • Check with your doctor before you begin taking any new medicine, either prescription or over-the-counter. This includes any medicines that contain caffeine.
  • This product has not been approved by the Food and Drug Administration (FDA) as safe and effective for any medical condition. The long-term safety of herbal products is not known. Before using any alternative medicine, talk with your doctor or pharmacist.
  • PREGNANCY and BREAST-FEEDING: Green tea is not recommended for use during pregnancy. If you are or will be breast-feeding while you are using this product, check with your doctor or pharmacist to discuss the risks to your baby.

Possible side effects of green tea:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Constipation; diarrhea; nausea; restlessness; stomach upset; tremors; trouble sleeping.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); fast or irregular heartbeat; mental or mood changes.

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