This seems to be another one of those finasteride grey areas. I've read that it's essential to get blood tests done before you start finasteride and then as often as every 3 months. I've also read articles from actual doctors saying blood tests arn't essential unless you start to get certain sides. I've been on finasteride nearly 2 years now with positive results but I'm a little concerned because I've never had blood tests done before or during this time. I'm thinking of speaking to my doctor tomorrow to see what she thinks but I don't want to waste her time.