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  • Title: Seasonal variation of Stevens-Johnson syndrome and toxic epidermal necrolysis associated with trimethoprim-sulfamethoxazole.
    Author: Wanat KA, Anadkat MJ, Klekotka PA.
    Journal: J Am Acad Dermatol; 2009 Apr; 60(4):589-94. PubMed ID: 19217690.
    Abstract:
    BACKGROUND: Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are rare and severe cutaneous adverse reactions to medications and infections. OBJECTIVE: We sought to determine whether a seasonal variation to SJS and TEN exists and to define the characteristics in our tertiary referral hospital. METHODS: A retrospective chart review of 50 patients from 1995 through 2007 was performed and statistically analyzed. RESULTS: The most common medication implicated as a cause of SJS/TEN was trimethoprim-sulfamethoxazole (TMX) (26%). A seasonal trend, favoring springtime, was observed for the total number of cases of SJS and TEN (P = .34). There was a significant increase in cases due to TMX (53%) occurring in spring compared to other seasons (P = .002). These patients were significantly younger (37.8 +/- 13.7) than other patients with SJS and TEN (53.7 +/- 16.4) (P = .003). Their overall mortality (1 death) and average SCORTEN value (1.62 +/- 1.6) was also significantly lower (P = .04 and 0.03, respectively). Based on outpatient pharmacy records, there was no increase in TMX prescriptions filled during the spring. LIMITATIONS: The study was limited by reliance on chart data, the use of inpatient records, and number of patients. CONCLUSIONS: A seasonal variation in SJS and TEN caused by TMX affecting younger patients may exist.
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