Since starting accutane 3 weeks ago, I have a lots of white heads in my nose?

1.Since starting accutane 3 weeks ago, I have a lots of white heads in my nose (they are really hard), they won't even come out when I try extracting them with my fingers. What do I do about them? 2.I weight 75 Kg, my doctor put me on 40mg/day for a 6 months period, but according to my research that is less than the recommended dose, shall I get a second opinion (PS:My acne is less than mild, one or 2 pimples a month but my doctor subscribed it to me because of bumps under my skin)

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