Meaning of ADVERSE REACTION in English

ADVERSE REACTION

side-effect; an undesirable or allergic response to a drug. Many of the drugs used to fight HIV Disease cause adverse reactions in a small number of people. Some side effects are minor, and others go away after a few days. A few are truly nasty and require quick medical attention. If you think you are having an adverse reaction to a drug, contact your doctor immediately.

AIDS English Glossary.      Английский словарь СПИДа.