doi: 10.1503/cmaj.220049 A 31-year-old woman presented to the dermatology department with an asymptomatic erythematous patch on the dorsum of her right foot (Figure 1A). [...] She had had a similar epi- sode the previous year on the same site, after taking the same dose of doxycycline after laser treatment (Figure 1B). [...] Fixed drug eruptions are common,1,2 Figure 1: Photographs of the feet of a 31-year-old woman with fixed drug eruptions from and consti- doxycycline. [...] (A) A well-demarcated, asymptomatic, erythematous patch with a central tute 14%–22% of cutaneous drug reactions among dusky zone over the dorsum of the right foot. [...] exposure to acetaminophen, nonsteroidal anti-inflammatory Affiliations: Department of Dermatology (Chou, Chang), Taipei Medical drugs, anticonvulsants and antibiotics.1,2 The lips, the anogenital University Hospital, Taipei, Taiwan; Department of Dermatology, area and previous trauma areas are the most common sites.2 School of Medicine, College of Medicine (Chang), Taipei Medical Univer- The diagn.
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