Also, what is the difference between a sulfa allergy and a sulfur allergy?
Answer Dear Avnee Product information has to be supercautious because of litigation etc so the risks are very often overstated. I do not quite understand this statement. “Through some research, I have found that sulfa antibiotics are more likely to cause a reaction than nonantibiotics”. ie what are non-antibiotics – to me this a meaningless term and I need clarification on this. Sulphacetamide can be classified as an antibiotic. Sulpha allergy pertains to sulpha drugs which include sulphacetamide and many non-antibiotic drugs eg some are used in diabetes. The drugs contain a specific group which has a sulphur atom in it. Sulphur is an element and is rarely used in medicine these days except for example a little in acne treatment. As they are very different chemically speaking cross sensitivities are rare.