Sue, My husband with pd had the same experience with Ativan. He was in the hospital for a pace maker, Ativan was given to him before and after surgery. Immedistely following surgery the symptoms started. It got so bad he had to be restrained as he kept trying to get out of bed and he had hallucinations galore. This went on for 5 days as the hospital continued to give him Ativan. Finally my son looked in the PDR to learn more about the drug since this behavior continued to be so unlike anything we had ever experienced. First, it said not to give the medication to seniors following surgery ( in my opinion not before surgery either). It also said how long it would take for the medication to leave his system. We demanded the hospital discontinue Ativan, not an easy thing to do as they follow the doctors orders. It was stopped and within the exact time stated he started getting better. He apparently had an over dose which kept him in the hospital for over a week. He is now in the hospital and Ativan is written on everything that he is not under any circumstanes to be given this drug. Unfortunately he has been in the hospital for a month in serious condition. He had quadruple by pass surgery which was successful, however his heart was having fibrillation problems and the cardiologist said he would need a defibrillator. This surgery did not go well and shortly following the surgery he had a stroke leaving his left side paralyzed. He is having a hard time pulling out of this, we think his best chance of recovery in through prayer. Good luck to your father. You are wise to check medication that effects some this way. Carolyn Johnston [log in to unmask] "I am only one, but I am one. I cannot do everything, but I will not let what I cannot do interfere with what I can do." - Edward Everette Hale