Totally scary. I have some friends who take pills with full trust that their docs are checking drug interactions. I certainly did the same when I was younger, but haven't in years. I ask them and then I check myself.
Good idea to ask for what you want with the labs. That's a bit more of a challenge if you aren't trained in the field, but certainly worth at least checking into. For instance, I have seen many different lists of tests that one should take to help verify PMR mostly by ruling out other things, which is, of course, vital. Could change everything if a lab was missed that confirmed another disorder.