What are the Side Effects of Blueberry?

Blueberry is a herbal plant. It’s fruits and leaves are used for preparing medicines. Blueberry is used for the prevention of glaucoma and cataracts and for the treatment of ulcers, MS (multiple sclerosis), UTIs (urinary tract infections), CFS (chronic fatigue syndrome), varicose veins, hemorrhoids, colic and fever. It is also used as a laxative for improving circulation. In addition to these benefits, there are various side effects of blueberry which are discussed below in this article. So, read on…

Side effects of blueberry

The following is a list of side effects of blueberry, although it is likely to be safe to take for most individuals. But, the safety of taking leaves of blueberry orally is not enough known. Thus, it is best to avoid taking leaves.

  • Allergy:

    Although, blueberry is well tolerated by most individuals and also has low allergenic factor. There are also no studies about blueberry as an allergen. But, people allergic to stone fruit may also be sensitive to blueberry.

Precautions to be considered:

  • Pregnancy women:

    The fruit of blueberry is likely to be safe when used in normal amounts found in foods. But, the safety of taking larger amounts of it as for medicine is not enough known. Thus, it is best to take in normal amounts during pregnancy.

  • Breast-feeding:

    Breast-feeding women must also avoid the intake of blueberry in larger amounts. It is good to take it in normal food amounts.

  • Diabetes:

    Blueberry may lower the levels of blood sugar in individuals with diabetes. Check for the signs of hypoglycemia (low blood sugar) if you are a diabetic patient and then carefully monitor your blood sugar levels while using blueberry. The dose of the medications for diabetes might need to be maintained by your doctor.

  • Surgery:

    Blueberry may also affect the glucose levels in the blood and can interfere with the control of blood sugar after and during surgery. Thus, it best to stop the use of blueberry at least two weeks before the scheduled surgery.


Blueberry may interact with medications used for diabetes (which include Antidiabetes drugs). The leaves of blueberry may decrease blood sugar. The medications used for diabetes may also help to lower blood sugar levels. Taking blueberry leaves while using diabetes medicines may cause the blood sugar level to go too low. Thus, be careful and monitor your levels of blood sugar level very closely. Thus, while taking blueberry, the dose of diabetes medication must be changed.

Some of the medications used for treating diabetes include glyburide (DiaBeta, Micronase Glynase PresTab,), glimepiride (Amaryl), insulin, pioglitazone (Actos), chlorpropamide (Diabinese), rosiglitazone (Avandia), tolbutamide (Orinase), glipizide (Glucotrol) and others.


Appropriate dose of the blueberry depends on various factors such as the patient’s age, health and various other conditions. At this point of time, there isn’t enough scientific information as to determine the appropriate dosage range for blueberry. It is important to keep in mind about the fact that all natural products are always not safe and the dosages are very important.

Thus, be sure that you follow relevant directions while using different products and consult your physician or pharmacist or other medical professional or doctor before using this any medicine.

The above article discusses briefly about the side effects of blueberry . Be careful not to get confuse with blueberry and biliberry. Outside of the US, the name blueberry may also be used for the plant called biliberry in the United States. Some of the other health benefits of blueberry include treating diarrhea, labor pains, swelling (inflammation) of the inner lining of the throat and mouth and sore throat.

Comments are closed.