Effective Pharmacovigilance relies upon the recognition and assessment of safety signals that alert healthcare providers to the potential risk and threat to the health and safety of patients connected with a particular pharmaceutical product. Constant and vigilant surveillance of medical and pharmaceutical literature is a crucial component of effective pharmacovigilance. Literature surveillance involves the systematic monitoring and analysis of scientific literature, medical journals, clinical trials, and other sources of medical information necessary to prevent the adverse effects or any other drug-related problems.