Chemical medicine

I have a sneaking suspicion that chemical medicine of the kind doctors prescribe is not very good for you.

How could a denatured chemical taken regularly have a positive effect on the body?

It makes no sense.

"Scientific" testing suggests the chemical is good at doing something in the body that is wanted without doing too much else of something that is unwanted.

Fair enough if people buy this story and believe in the value of the chemical to achieve some kind of wonder, but excuse me if I don't buy it!