My Skin Specialist Has Told Me That Otezla May Be

My skin specialist has told me that Otezla may be a medication for my severe psoriasis . I have a liver disease that leaves few options for treating my psoriasis he tells me .
Is Otezla an option that you would consider also and is there any other medication you might suggest that I could ask my doctor about?
Lastly, what is the cost of Otezla?
Thank you!
Sandra