I'm so glad you posted this. I had been a bit worried about the effects of the meds on my boy Sam. He just started acting weirder, not sleeping at night, pacing, panting. He's just had a full work up and we see the vet every few months for a check over because of his arthritis, his meds, and a lump that keeps going up and down (its been aspirated, B9)--so physically, he appears to be pretty sound. He got up twice in the middle of night last night and my husband said, at 4 am, I think he has dementia. Ding, ding, ding--I thought of this thread. I asked my DH why and he said that he thinks that sometimes he forgets he has just been out--stares at the window when the blinds are down, seems lost in the middle of the night. Dang, I did not even realize what might be going on with the old guy was beyond his arthritis and meds. Will talk with the vet very soon about this.
Hugs to all the oldie parents.