Subjects will take Apremilast capsules 20mg twice per day for 12 weeks. If at anytime during the study a subject encounters overt study medication related adverse effects, dose reduction will be allowed following discussions between the subject and the investigator. Dose reductions to 20mg once per day will be allowed for subjects who experience intolerable adverse effects from the study medication. If the subject cannot tolerate 20mg per day, he/she will be terminated from the study.