Pharmacological action: Generic accutane is active form of vitamin A, 
can be synthesized in the body. Isotretinoin is not directly associated 
with the nuclear retinoic acid receptors and their subclasses (alpha-, 
beta-and gamma-receptors). It is rapidly converted into tretinoin 
(all-trans retinoic acid) and other substance-ligand nuclear retinoic 
acid receptor gene expression and gives cause changes in protein 
synthesis (depending on the tissue - either induction or inhibition).