Medically reviewed by Patricia Mikula, PharmDDrinking cranberry juice while you have a UTI may exacerbate symptoms.Credit: HandmadePictures / Getty ImagesKey TakeawaysCranberries contain proanthocyanidins that may help prevent recurrent UTIs, but they do not treat active infections.Evidence supporting daily cranberry juice or supplements for UTI prevention is limited and inconsistent.Cranberry juice can irritate the bladder further when you alre…