[nosefurhairdo]

Thank you. If we prosecuted scientists for a drug as well tolerated as finasteride we would cease to develop new medication and all of humanity would be worse for it.

If there was some indication that the pharmaceutical company knew of and concealed evidence that finasteride caused depression/suicidality, then there could be grounds for criminal prosecution. But a non-consensus view in hindsight that a drug might increase depression looks more like a losing civil liability claim.