Just an anecdote but i'll put it here:
A friend of mine insisted that her ex was slowly driven somewhat mad by finasteride, not in the typical crazy ex way, but obsessive somewhat delusional thoughts and moods, like he was getting stuck in a loop over some idea.
She later dated another guy who was taking it for a very long time, and said he had the same type of delusional quirks.
Sure, people got the brain eating bug in the past, too, but it seems nowadays it is much more common.