No, they still don't. I went to a GI doctor recently with the complaint that I can't consume caffeine, or oily foods anymore without stomach issues. He prescribed a GI antibiotic to "try." Nothing has changed but I'm a bit poorer.
Example case in point: antibiotics can mess up a healthy person and induce stomach issues.
One doctor read though it and correctly diagnosed the mystery illness. (Sjogrens) Later verified.
Turned out the line that caught his attention was that symptoms always eased up when I took doxicyline. This 80 year old doctor had seen that enough to pick out the illness.
There is some minimal research into the topic but in general it’s a taboo subject and no doctor will consider a round as a test to see if it will help.