Dad sedated, Last hours?

My dad had to be sedated (Ativan, just like Denise) around 1am or 2am this morning. He slept most of the day yesterday but he became disoriented & anxious yesterday evening. It reminded me of Denise before she had her seizure. He was not connected with reality, fixated on distances, measurements, angles, tolerances, positions and directions. At one point when the nurse and I were moving him, it sounded like he was saying a few things in Hebrew (he was teaching himself a few years ago; he wasn't speaking in tongues). He started to pull things out overnight. He is currently breathing about once every 20 seconds and not suffering or in any pain. My brother, sister-in-law, a boyhood friend, and a quartet friend rotated shifts with him overnight so he wouldn't be alone. I haven't talked to the doctor or nurse, but my feeling is that these are the last hours. My mom's been called and I'm leaving for the hospital right now.