My 80 year-old mother was diagnosed with Alzheimers approximately 4 years ago and the Dr prescribed the patch 2 1/2 years ago. It does not seem to be helping as it originally did. She continues to have urinary track infections, which is a common side effect for this patch, and Uti'S are also very common in person's with this disease for a variety of reasons. Also, the cost, once you reach your allowed limit with Medicare, is prohibitive if it is not contributing anything to her life.