“…This effect is responsible for the allergic responses of many people to many popular small molecule drugs, such as penicillin and sulfonamides, which react with proteins to form haptens that can stimulate an antibody response (Blanca et al, 1989b;Shepherd, 1991;Rieder et al, 1991). Protein conjugates of tolmetin (Zia-Amirhosseini et al, 1995), diflunisal (Williams et al, 1995), and diclofenac had been show to be immunogenic and to generate drug-specific antibodies in animals.…”