On your first point... Roche gives them guidelines on Lipids, liver function, psyche, hearing, inflammed bowel disease, pregnancy, bone mineral density, visual impairment and more. What the majority of the doctors using it test for closely, is liver stress. So say all those who have posted about it. And myself but I won't even count me.
I am in the US. Here read all about it. Knock yourself out.
http://www.rocheusa.com/products/accutane/pi.pdf
On your second point... I don't know what AMGETR's case is and he's not me or anyone else.
There was a teenager here in Florida who flew his single engine plane into a building and killed himself. His mother is suing Roche. Court documents claim that the psyche affects of his accutane course led to the suicide. Does that mean if she's right that people who have access to planes on this board shouldn't use Accutane?
You can't take one case and apply it to the whole AS using community.