1) A study as early as 1995 had it at 22% but it was finasteride 5 mg. It's much higher than Merck's 3%.
2) You need a unit of time before you even begin to answer this question. If you say a year, I'd say anywhere from 15-30 men would have permanent sides. Not much evidence for this, just going on what little data we have.
3) Who knows. Depends your your genetics. (Number of CAG repeats on the Androgen Receptor)
Please don't take the advice from a 17 year old kid. No offense to TheEscapist, but he celarly doesn't know what he's talkin about. Not blaming him, he is 17 and gets his "information" from Internet forums. Persistent finasteride sides effects have nothign to do with "anxiety" or "panicky." It's a copout for those who don't know what they're talking about. It's easier to say "it's all in your head" than explain how finasteride induced negative autoregulation, altered transcription factors of the AR and other protein-protein interactions.
Also, even Propecai clinical trial reviewers questioned the drugs safety and admitted the drugs effects weren't known. Post-marketing surveillance (Phase IV) provides much more robust data than corporate sponsored clinical trials. So to say it if a drug's side effects weren't picked up in the clinical trials it must be "all in your head" is about as scientifically inept as you can get.
Go ahead and explain how "negative autoregulation, altered transcription factors of the AR and other protein-protein interactions." lead to the results you believe they do. It will be thrilling to hear you, such an intelligent man of science who, armed with a computer and an abundance of free time, has somehow found real, tangible, study-tested proof of his claims that finasteride does and will cause "negative autoregulation, altered transcription factors of the AR and other protein-protein interactions", which WILL lead to everything you claim it will. You have no conclusive proof of anything you imbecile.
You've read studies, you've read reports, but do you have any ****ing idea what the "altered factors" you rave on and on and on about will do to the OP, to me, to anyone? You have no god damn clue what will happen inside a man's body after he takes a drug, and the fact that you think you can sum it all up by citing processes and occurrences you've read about in studies shows you give no heed to the countless, unknowable occurrences of the human body that you or I simply cannot determine or observe.
You're an ignorant fool if you think that there aren't people out there who worry themselves into symptoms comparable to those claimed by many people with "PFS". Never have I ever denied the possibility, nor professed to declare as fact any prediction about the likelihood or existence of persistent side effects. Thats because I KNOW THEY EXIST. But just because I'm believing one truth, doesn't mean I forget the proven truth that your mind affects your body in powerful, noticeable, and physically tangible ways.
You're unwise to assume that my age limits me in some way because you think that you're my better for having read more studies or stated more opinions as fact in your time on the planet. YOU cannot tell this man whether or not his body will react negatively or positively to the drug, so quit trying to imbue in him or anyone else the sense that you can.
Who ever takes my advice can do so as they damn well please. But do not for a second insult my intelligence or my capacity to see truth where it exists.