How does the risk of allopurinol-induced toxic epidermal necrolysis (TEN) vary over time?

Updated: Jul 01, 2021
  • Author: Samantha P Jellinek-Cohen, PharmD, BCPS (AQ-ID); Chief Editor: Michael Stuart Bronze, MD  more...
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With allopurinol, risk is not constant over time. Patients have a 5.5 relative risk. However, during the first 2 months of therapy, the relative risk is 52, and the long-term therapy risk is 0.5.

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