Discovered in 1971, and introduced for medical use in the 1980s.
“Where can I find studies about it”?
Have you tried perhaps, idk, a search engine? How do I have a feeling that even if I were to show you the science which agrees that they are safe medications, you’d have an “argument” in which you criticise the info without even reading it.
People perfectly well know how to look for things online, and when they pretend not to… well, it smells fishy. Fishy, like sealions.