On the website www.soriatane.com
you will find a lot of information about the drug. I recommend reading the product information on the following link: http://www.soriatane.com/include/pi.pdf
Bone problems are mentioned e.g. on page 11.
By the way: Roche used to have all this information on their US-website. Now there is a new website www.soriatane.com
by Connetics. Does anybody know more about that? Is Roche no longer producing Soriatane?