Is taking Accutane 20mg/day for 5 months enough? How do I get rid of scars?

My doctor told me that I should stop, using Accutane (after 5months/20mg/day) since it has bad side effects. I heard that doctors in the US prescribe 40mg/day or even more. I don't really get acne on my skin anymore, but I don't really know if it is acne or scars, that are left.Also, what is the best way to get rid of scars? My doctor told me I could use a laser treatment, after finishing Accutane, but should I use laser treatments right after finishing Accutane?I heard that its not good.

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