So I've read that "brain fog" is a symptom of finasteride that some people are reporting. I have actually felt this brain fog before I went on finasteride, and the solution I've found that works for me is to spend 30 minutes or more outside. This sensation for me began just this year, and I had never felt it before. It did really feel like a fog in my brain. I don't know how else to describe it. But I went for a walk and my head cleared up. I don't know if anyone else here has experienced brain fog or if they've found solutions for it, but I just wanted to post what has worked for me in case it could help anyone else.