I wanted to alert you to my experience I have had with Finasteride (Propecia). I started taking 1mg of Finasteride about 5 months ago. (I have since stopped) During that time, I experienced a strange sensation which I even thought might be an early onset of dementia. This sensation manifested itself in numerous ways; I found myself not as sharp as I usually was and a few times I could not think of a word as I was engaging in business conversation (small level of stress involved). Also at times I'd feel like I'd be walking, and my mind was a millisecond behind my body motion. Additionally, I noticed when I was quickly crafting emails, I would have more spelling errors or a missing word than usual. The change was noticeable enough for me to first do some research on early symptoms of dementia. My memory was not at 100%; I just had a feeling that my senses were somewhat dulled. Normally I have always felt sharp and in my business, situations required quick creative solutions - however my mental capacity felt blunted.
It was a strange feeling.
I then started searching the Internet for side effects of Finasteride and stumbled upon a forum that discussed a term that I found striking - "Brain Fog". Brain Fog is exactly how I would describe what I felt. I have since stopped taking Finasteride and it has been about a two months now. I have noticed a measurable improvement. I would not say I am back at 100% (but close); I do feel much more like my usual self. Still might be too early to tell but the worse of the symptoms seem to be vanished.
I will never take this drug again. Symptoms were real and disturbing. I have no history of any mental conditions and I am not on any other medications. If this topic were to come up in conversation, I would strongly warn others to avoid this drug.
FWIW.