However, this and other side effects wore off as my body got used to the medication. I had no side
effects, except for dry lips, from 12 weeks onwards and took
Accutane for 24 weeks.
Side effects are generally dose related. Taking Accutane at the recommended dose for 16 to 24 weeks is your son's best hope of a long term remission from acne.
The recommended dose is between 0.5 and 1mg x kg bodyweight per day. So your son should take between 30mg and 60mg per day because he weighs about 60kg.