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At Healthfully, we strive to deliver objective content that is accurate and up-to-date. Our team periodically reviews articles in order to ensure content quality. The sources cited below consist of evidence from peer-reviewed journals, prominent medical organizations, academic associations, and government data.
- NIH: National Center for Complementary and Alternative Medicine: Urinary Tract Conditions: Examining the Evidence on Cranberry and Saw Palmetto
- National Institutes of Health: Cranberry
- Food and Drug Administration: Coumadin Medication Guide
The information contained on this site is for informational purposes only, and should not be used as a substitute for the advice of a professional health care provider. Please check with the appropriate physician regarding health questions and concerns. Although we strive to deliver accurate and up-to-date information, no guarantee to that effect is made.
What Are the Side Effects of Cranberry Juice?
Cranberry juice, often used as a preventive measure against urinary tract infections, is generally safe when consumed in normal quantities, according to the National Center for Complementary and Alternative Medicine, a division of the National Institutes of Health. However, consuming large quantities of cranberry juice may produce some side effects, and taking it in conjunction with certain medications may cause drug interactions. Most are not dangerous or life-threatening.
Gastrointestinal Problems and Diabetes Complications
Drinking large quantities of cranberry juice may cause upset stomach and diarrhea. Cranberry juice has a high sugar content, so if you have diabetes or glucose intolerance you should avoid excessive sugar intake by choosing sugar-free cranberry juice.
Coumadin & Diabetes Diet
Cranberry juice can contribute to increased risk of developing kidney stones. Cranberry juice contains high levels of chemicals, called oxalate, that are associated with the formation of certain types of kidney stones. If you have a history of kidney stones, you may be especially susceptible to increased risk and should consult a doctor before drinking large quantities of cranberry juice.
Cranberry juice may interact with blood thinners, such as warfarin, to cause excessive bleeding. Although some controversy exists over the studies conducted on this interaction, the Food and Drug Administration’s Medication Guide for Warfarin Sodium Tablets instructs patients to “avoid drinking cranberry juice or eating cranberry products” while taking the medication. Medications that affect the liver may also negatively interact with cranberry juice.
Benicar & Potassium
If you have an allergy or hypersensitivity to the Vaccinium species of berries, which includes cranberries, you should not drink cranberry juice. You should also avoid cranberry juice if you are allergic to aspirin.
Coumadin & Diabetes Diet
Benicar & Potassium
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Allergy to Cardboard
Foods to Avoid When Taking an MAOI
Can I Take Benicar & Eat Grapefruit?
Allergy to Vitamin B-12
Allergy Symptoms of Augmentin
Tamarind Spice Allergy
Ambroxol Hydrochloride Side Effects
- Cranberry. National Institutes of Health. https://nccih.nih.gov/health/cranberry. Published November 30, 2016.
- Lee IT, Chan YC, Lin CW, et al. "Effect of cranberry extracts on lipid profiles in subjects with type 2 diabetes." Diabetes Med. 2008;25:1473-1477.
- McKay DL, Blumberg JB. "Cranberries and cardiovascular disease risk factors." Nutr Rev. 2007;65:490-502.
- Novotny JA, Baer DJ, Khoo C, Gebauer SK, Charron CS. Cranberry Juice Consumption Lowers Markers of Cardiometabolic Risk, Including Blood Pressure and Circulating C-Reactive Protein, Triglyceride, and Glucose Concentrations in Adults. Journal of Nutrition. 2015;145(6):1185-1193. doi:10.3945/jn.114.203190.
- Ruel G, Pomerleau S, Couture P, et al. "Low calorie cranberry juice supplementation reduces plasma oxidized LDL and cell adhesion molecule concentrations in men." Brit J Nutr. 2008;99:352-359.
Linda Hinkle has been a writer since 2004. She spent 29 years teaching mathematics in public high schools and now maintains a private tutoring practice. In addition to writing about education and parenting issues, she writes mathematics assessment and test prep items. Hinkle is a graduate of the University of Central Arkansas, where she earned a bachelor's degree in education.