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Medically reviewed by Last updated on May 12, 2022.

What are other common names?

  • Vaccinium macrocarpon
  • Vaccinium oxycoccos
  • American Cranberry
  • Arandano Americano
  • Arandano Rtepador
  • Bearberry
  • Bog Cranberry
  • Cranberries
  • Cranberry Extract
  • Cranberry Fruit
  • Cranberry Fruit Juice
  • Cranberry Juice
  • Cranberry Juice Cocktail
  • Cranberry Juice Concentrate
  • Cranberry Powder
  • Cranberry Powdered Extract
  • Craneberry
  • European Cranberry
  • Grosse Moosbeere
  • Kranbeere
  • Large Cranberry
  • Mossberry
  • Small Cranberry
  • Trailing Swamp Cranberry
  • Tsuru-Kokemomo
  • Vaccinium

What is this product used for?

Cranberry is a fruit. It is also sold as fruit juice and as a dietary supplement product. It is used by some people to help prevent urinary tract infections.

What are the precautions when taking this product?

  • Always check with your doctor before you use a natural product. Some products may not mix well with other drugs or natural products.

  • Do not take this product if you tend to get kidney stones.

  • Be sure to tell your doctor if you are pregnant, plan on getting pregnant, or are breastfeeding. You will need to talk about the benefits and risks of using this natural product.

  • Take extra care if you are taking drugs to thin your blood. These are drugs like warfarin.

  • Take extra care if you have diabetes or if you are sensitive to sugar. Some cranberry juice products contain high amounts of sugar.

  • Take extra care and check with your doctor if you have:

    • Bladder problems

    • Kidney stones

    • Blood sugar problems

What should I watch for?

  • Upset stomach

When do I need to call the doctor?

  • Signs of a very bad reaction. These include wheezing; tightness in the chest; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat. Go to the ER right away.

  • Signs of high blood sugar. These include sleepiness, blurry eyesight, passing urine more often, increased thirst or hunger, unexplained weight loss, breath has a fruity sweet smell, upset stomach and throwing up, dizziness or passing out.

  • Very bad throwing up

  • Very bad loose stools

  • Very bad pain in your back

Where can I learn more?

National Center for Complementary and Integrative Health

Last Reviewed Date


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