My father has severe rheumatiod arthritis. He has been on a combination of Arava 20 mg ( Hydroxychloroquine) and Plaquenil (Leflunomide) . He has been going severly downhill since January and has lost 40 pounds, has constant mucous drainage that he chokes on especially after meals, and has severe shortness of breath. Can these symptoms be a result of the medications he is taking? Is it safe for him to take two synthetic DMARDS at the same time?