Can a patient with a sulfonamide allergy safely receive metronidazole? Sulfa Allergy: What It Is and How to Avoid It 10. Drug allergy Journal of Allergy and Clinical Immunology Datis If you have a sulfur sensitivity, glutathione can be problematic. Glutathione is primarily made up of sulfur, which can cause issues for those with a sulfur sensitivity. While Glutathione is A Comprehensive Review of Sulfonamide Hypersensitivity: Implications for Clinical Practice Clinical Reviews in Allergy & Immunology Springer Nature Link