I started with 5mg and the seborrhoeic dermatitis was almost as bad as it is with 20mg. I think the dose doesn't make a big difference in my case, It is a direct effect of the drug, which I can't explain. And the weird thing is that I actually have dry skin (even befores Accutane). It is a pretty strange combo of dry skin + seborrhoeic dermatitis + adult cystic acne (I'm 30 years old). My derm told me that it is the first time he sees a dry skin with seborrhoeic dermatitis. I've seen many dermatologist and nobody understand my condition.
Could it be Accutane pushing the sebum through the skin? No stop , or something like that..