Adverse Effect of Paradoxical Reaction

  

Abstract

A paradoxical reaction or effect is an effect of a chemical substance, typically a medical drug, that is the polar opposite of what is predicted. Pain triggered by a pain reliever is an example of a paradoxical reaction. An episode of new inflammation, with or without pus development, and major enlargement of a healing lesion during or after antibiotic treatment is referred to as a paradoxical reaction.