9A REVIEW ON PHARMACOVIGILANCE AND PATIENT’S SAFETYPharmacovigilance starts from the clinical stage and continues throughout the product life cycle of the drug, mainly divided as pharmacovigilance during pre-marketing (that is clinical phase) and post marketing. The process of collection of such information about a drug begins in phase I of the clinical trial, before approval of the drug, and continues even after approval; several post-market safety studies are conducted, with many made mandatory by drug regulatory agencies around the world. Discovering that patient safety had become a frequent topic for journalists, health care experts, and the public, it was harder to see overall improvements on a national levelsadu.balaji@gmail.comReview212012Pharmacovigilance,Patient safety,PharmacoenvironmentologyS. Balaji,M. Sekar Babu,K. UmasankarKrishna Teja Pharmacy College, Chadalawada Nagar, Tirupati-517605, Andhra Pradesh, India,Krishna Teja Pharmacy College, Chadalawada Nagar, Tirupati-517605, Andhra Pradesh, India,Krishna Teja Pharmacy College, Chadalawada Nagar, Tirupati-517605, Andhra Pradesh, India