What Does IDR Stand For?

IDR stands for Idiosyncratic Drug Reaction

IDR, or Idiosyncratic Drug Reaction, refers to an unusual and unpredictable adverse reaction to a medication that occurs in a small subset of the population. These reactions are not dose-dependent and can arise from genetic, metabolic, or immunological factors unique to the individual. IDRs often manifest as severe side effects that can vary significantly from typical drug responses, making their identification and management challenging in clinical practice.

Other Meanings for IDR