If you do a search, there is a LOT of information about it. In short, there's a lot of controversy about using it in children because of the side effects. It can cause liver problems. One of the other types, Accutane (isotretinoin) is known to cause bone density problems. They all cause birth defects and have a several-year period between when you stop taking it and when it gets out of your system. For women, you can't get pregnant while on it or for 2-3 years after you stop taking it.
Here's a link with info about it: http://www.nlm.nih.gov/medlineplus/druginfo/meds/a601010.html
Ichthyosis-en-Confetti Type 2
Husband, Nathan - 10, Elliot - 7, Oliver - 4, all affected.
I also have an unaffected daughter, age 8.
email: jennifer at confettiskin dot com
facebook - find me on "ichthyosis mommy spot" or "friends of ichthyosis"