multiple sclerosis
"DMF is already for longer than 35 years used for treating psoriasis in Germany. It is an excellent medication, if you use it right. In its basic for it is extremely cheap. 
The warnings for the brain disease are correct and caused by low lymphocytes, but this situation is easy to circumvent. 
The protocol that is prescribed by the producer is far too quick. You should do a much slower build up of the medication. During the build up there should be a very regular check on the lymphocytes and also when you are "leveled" you should have your lymph's checked regularly until you are sure that you are stable. Furthermore take the medication intermittently, 5 days meds vs 2 day no meds, is far more effective "