Huh? I know nothing about anatomy and medicine, remember?
This is mostly so I won't forget -- my hometeaching companion has fibrosis in his lungs, a condition where the lungs scar over more and more, until the condition is fatal. (There are a bunch of fibroses on wikipedia, but this one looks like it might be it.)
He mentioned today that in talking to other people with the same kind of fibrosis, the common thread is that all of them had taken a blood pressure medicine called Lisinopril. He said one guy was in his 80s, healthy as a horse, was put on Lisinopril and within 3 months had fibrosis and his lungs and had to be put on oxygen. Ouch.
Interestingly, he said that when he stopped taking that medicine, his blood pressure immediately dropped -- apparently it wasn't working as well as was expected.
Watch out for that stuff (and medicines in general!).