Sulfasalazine is used in the treatment of ulcerative colitis, Crohn’s disease, systemic lupus erythematosus, Wilson's disease, ankylosing spondylitis, psoriatic arthritis, rheumatoid arthritis, and type 2 diabetes mellitus.
How Sulfasalazine works Sulfasalazine is a disease-modifying anti-rheumatic drug (DMARD). It functions by suppressing the overactivity of the immune system in autoimmune diseases and blocking the chemical messengers that lead to inflammation.
Common side effects of Sulfasalazine include headache, nausea, oligospermia (low sperm count), vomiting, decreased appetite, decreased white blood cell count, dizziness, fever, insomnia (difficulty sleeping), itching, joint pain, photosensitivity, protein in urine, rash, stomatitis (inflammation of the mouth), taste changes, and dyspepsia.