my husband was prescribed Nemdatine for a 3 month trial period due to him hallucinating. he had successfully been taking Aricept for 6 years prior to this. After 2 months on |Nemdatine his condition worsened, such as not knowing who I was. So we went back to his specialist who suggested a return to taking Aricept. I am hoping things will revert to how it was pre. Nemdatine. I wonder if anyone out there has had a similar experience?????