Medically reviewed by Scott Zashin, MD Hair loss is a common side effect of some arthritis medications, including Rheumatrex or Trexall (brand names of methotrexate), Arava (leflunomide), Enbrel ...

In a large cohort of patients with autoimmune diseases, treatment with biologic disease-modifying antirheumatic drugs was associated with reduced incidence of Parkinson’s disease, data show.