Support your pet’s urinary health with Rx Vitamins Rx Cranberry by MedVant. This high-potency supplement features pure, North-American grown cranberry concentrate (Vaccinium macrocarpon) standardized to a minimum of 3% proanthocyanidins (OPC) and 6% quinic acid. Ideal for dog supplements and cat supplements seekers, it’s made with natural ingredients to help support a healthy urinary tract. Convenient 90-capsule bottle; non-prescription and easy to give orally.