ADVERSE DRUG REACTIONs (ADRs)
It has been recognized since the earliest times and now universally accepted that no drug is free from side effects and that drug therapy itself can be a significant cause of morbidity and mortality.
Definition of adverse drug reaction (ADR)
An ADR is basically any undesirable effect of a drug beyond its anticipated therapeutic effects occurring during clinical use.
An ADR is basically any undesirable effect of a drug beyond its anticipated therapeutic effects occurring during clinical use.
Several definitions of ADR exist in literature, including those of World Health Organization (WHO), Karch and Lasagna, American Society of Health- system Pharmacists (ASHP), and United States Food and Drug Administration (USFDA).
