I take 150mg and I saw results after on month and was clear in two months, I am still taking it along with Yasmin birthcontrol because it can mess with your period cycle. You have to keep taking it its not like accutane where you take it for a certain amount of time then stop, it will stop working if you stop taking it. As for the hair no I have not noticed that my hair grew a lot, the hair on my head is the same, I have slightly less body hair but I never had excessive body hair to begin with. For me Spiro has very few side effect far less than Accutane which dried my skin so bad it hurt, lots of bloody noses and bloody lips and gave me awful headaches and after all that my acne came back in 6 months.