Agreed, it is not to be expected that a doctor is able to follow the scientific literature for hundreds of different topics. However, I would expect a specialist to know their field well enough to assist a patient/guardian in making a somewhat informed decision.

I take your point that companies can falsely advertise their products. I think there is a place for a government body to make sure claims about healthcare products are factual. In this particular case we are talking about a drug that appears to not cause any harm. So I don’t see any reason to prevent an adult to make a decision with the help of a physician to administer said drug.