About 20% of patients who use Dovonex report that it causes skin irritation, burning, and/or stinging4. A smaller number of patients report side effects of dry skin, skin peeling, stinging, tingling, skin rash, or worsening of psoriasis symptoms.
Side Effects: Drinking large amounts of cranberry juice can cause gastrointestinal issues such as diarrhea. Drinking large amounts of water in a short time can lead to a potentially fatal condition known as hyponatremia, which is an imbalance of electrolytes in your body.
The amounts of cranberry given in the trials varied, and more research is needed to figure out exactly how much cranberry you'd need to consume, the paper says. (We wonder how strong those cranberry drinks blended with apple or grape juice really are). Also, the cranberry supplements were not as good as the real thing.