The whole "each human posses an entirely different physiology" is so blatantly false, there's more similar than different about humans. There's a reason we mostly use mice for experiments - they're surprisingly similar to us.

not really. if anything pharmacology has taught us that we are vastly different..much like our unique DNA. this is why in the future drugs will be build for each's DNA rather than generic ones. This is also why medicine doesn't work or works differently on different people (allergies, reactions. etc)