it doesn't really matter, but according to doctor Rassman from baldingblog, he says in his opinion it is good to take it in the morning when because thats when testosterone levels are the highest
It really doesn't matter. As long as you are using it consistently and at the same time daily, you will have the same effect. I take mine in the morning.
I remember when I was first researching finasteride some people commented on how it made them feel tired and lethargic for a few hours after taking it. I don't know if that's a real side effect or an imagined one....but I decided that I would take mine before I got to bed, that way I wouldn't have to worry about being tired after taking it