Table 2.

Previous reports of immune thrombocytopenia caused by sensitivity to a drug metabolite

ReferenceImplicated drugIg classSensitizing metabolite
Eisner and Shahidi,251972 Acetaminophen IgA > IgG Acetaminophen sulfate  
Eisner and Kasper,26 1972 PAS IgG, IgA Glycine conjugate of PAS?  
Meyer et al,27 1993 Ibuprofen IgG, IgM Unidentified urinary metabolite  
Kiefel et al,71987 Sulfamethoxazole IgG N4-acetyl sulfamethoxazole 
ReferenceImplicated drugIg classSensitizing metabolite
Eisner and Shahidi,251972 Acetaminophen IgA > IgG Acetaminophen sulfate  
Eisner and Kasper,26 1972 PAS IgG, IgA Glycine conjugate of PAS?  
Meyer et al,27 1993 Ibuprofen IgG, IgM Unidentified urinary metabolite  
Kiefel et al,71987 Sulfamethoxazole IgG N4-acetyl sulfamethoxazole 

Ig indicates immunoglobulin; PAS, para-aminosalicylic acid.

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