The latest news is that Linus's blood pressure meds have changed over from a pill to a liquid. The liquid, which is administered via a little syringe into his mouth, seems easier to into get him than the pills, but he doesn't seem to like it as much even though it's fish-flavoured.
He goes and hides after each dose, so he's clearly not liking it, although the length of his hiding is decreasing with each dose. I guess he's starting to come to the conclusion that I'm not trying to drown him.
I'm told that both his meds can be administered via a gel or paste that is rubbed in his ears. I used this method for his painkillers after his recent minor surgery and it worked great. So I'm going to look into that when he needs more meds.