25M, finasteride for one year and still have some thinning in the front of the hairline. I added dutasteride to my regimen on Thursday evening and almost immediately began to feel lightheaded and a strange almost disassociative/foggy feeling. I also took a pill yesterday but early in the morning around 8 or 9AM. I haven't taken it today asof 5PM. I don't feel as if I'm a hypocondriac due to the fact that I've used finasteride for over a year and the only side I've had is watery semen. Could the brain fog be anxiety or has anyone else felt that side almost immediately after taking dutasteride? Although I've done fairly well with finasteride alone I was hoping for more regrowth and the immediate sides from dutasteride have been discouraging and have made me drop it after only two days.