Pharmacovigilance is related to a number of scientific fields, the most significant being clinical medicine, clinical and pre-clinical pharmacology, immunology, toxicology, and epidemiology, despite the fact that it is increasingly recognised as a field unto itself. There are two main stages in the identification and examination of a drug's safety properties Pharmacovigilance Market. Prior to marketing, the first stage's primary technique involves clinical trials that compare the new medicine to a placebo or existing alternative therapies. The major safety methodology is observational, i.e., it uses data from observations of patients treated in clinical practise rather than from experimental conditions, after the introduction of a new treatment into widespread use. In general, experimental data have superior confounding factor control and are of significantly higher quality than observational data.
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