I have taken 2 courses of accutane- both with 30mg for 2 months, then 60mg for 6 months. The second course was mainly to address oily skin, but it came back. I want to do 20mg weekly indefinitely for my oily skin. The only issue I had during both courses was hair thinning at 60mg daily towards the last 4 months. Is this a cumulative effect or a higher dose effect? If I do 20mg weekly for my oily skin, will I experience hair thinning? Please help!