Rapamycin and the diabetes drug Metformin have been looked at being “longevity” meds. This is an interesting wrinkle, which again shows science sometimes doesn’t know what it doesn’t know, or thinks is an improvement when it is actually harmful.
People have different biologies. So the same drug can affect people in different ways. So my problem with rapamyacin could just be about me. Varied effects seems to be characteristics of all drugs.