Seventy one patients having fixed drug eruptions were subjected to provocation tests. The greatest number of cases were due to acetylsalicylic acid (18). Other drugs responsible were hyposcine butylbromide (15), oxyphenbutazone (14), sulphadiazine (7), tetracycline hydrochloride (6), metamizole (5) and ibuprofen (3). Other drugs were less frequent. There was evidence of cross sensitivity between various tetracyclines and sulphonamides and also between oxyphenbutazone and phenylbutazone. One patient had two groups of lesions, each reacting to a different, chemically unrelated drug.
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Kanwar et al. (1984) studied this question.
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