Olsalazine and sulfasalazine allergy.
D000636:Aminosalicylic Acids / Q000627:therapeutic use*; D004342:Drug Hypersensitivity; D006801:Humans; D012460:Sulfasalazine / Q000009:adverse effects*
D000636:Aminosalicylic Acids; D012460:Sulfasalazine; C032587:olsalazine