My 84 year old grandmother who was perfectly healthy. Walks 5-8 miles a day she is 4ft 11 inch . Has recently put on these medications; felodipine, Zoloft, lisinopril, aricept and has recently developed severe blurred vision, severe stomach pain,can't write or even read well anymore, also confusion and memory loss, slowed down on walking speed and loses balance. Again she has always been very healthy and has never had any medical issues other than given prescription for slightly high blood pressure. Then started with issues stated above causing more medications per issue. Could symptons worsen due to the listed medications at once?