The trouble with your new question is that the answerable part is indeed a duplicate. In addition, you have added a reference to five studies and asked:
I found some "similar" studies [2,3, 4, 5 ,6] but I lack the competence to assert their value. Does someone have some perspective on this? Are these believable studies? Was it well designed, and has it been duplicated?
Ignoring the perspective question, there are three questions asked about each of 5 studies, i.e. 15 questions. (Possibly, “believable” is a restatement of “well designed”, in which case we can call it 10 questions.) There’s also a question tacked on there that I’m not sure I fully understand but seems most likely to be primarily opinion-based: "If so, why wouldn't the pharmaceutical produced a certified and expensive drug instead of a no-prescription drug?"
I think it’s reasonable to ask people to help you evaluate research on health topics. However, if you want a rigorous methodological answer, I would recommend narrowing it down to the study you think is most convincing, reading it yourself, and trying to formulate a more specific question.
As it stands, I think the duplicate closure is appropriate because it redirects to the original, more answerable question.