GCP is the agreed international standard for conducting clinical research. Good Clinical Practice Training is needed for researchers conducting Clinical Trials of Investigational Medicinal Products (CTIMPs). Good Clinical Research Practice (GCP) is a process that incorporates established ethical and scientifi c quality standards for the design, conduct, recording and reporting of clinical research involving the participation of human subjects. Compliance with GCP provides public assurance that the rights, safety, and well-being of research Good clinical practice ( GCP) is a set of internationally-recognised ethical and scientific quality requirements that must be followed when designing, conducting, recording and reporting Abstract. This chapter looks at the purpose and history of the development of good clinical practice (GCP). The international conference on harmonisation (ICH) GCP is the international quality standard for conducting clinical research to ensure the rights and well-being of patients are protected and the resulting data are valid. The purpose of this paper is to analyse how compliance with GCP provides protection of the trial subjects and assures quality and credibility of the data obtained. Good Clinical Practice is an international quality standard for conducting trials that involve participation of human subjects. Good Clinical Practice (GCP) is an international ethical and scientific quality standard for designing, conducting, recording and reporting that involve the participation of human subjects. The Good Clinical Laboratory Practices (GCLP) concept possesses a unique quality, as it embraces both the research and the clinical aspects of GLP. The development of GCLP standards encompasses applicable portions of 21 CFR parts 58 (GLP) and 42 CFR part 493 (Clinical Laboratory Improvement Amendments -CLIA) . All researchers are obliged to follow the very detailed principles/rules of the International Conference on Harmonization—Good Clinical Practice (GCP). GCP is an international ethical and GCP stands for Good Clinical Practice. GCP is a guide to international ethical and scientific quality standards in clinical trials. The GCP guideline applies to all persons involved in a study. In addition to patient safety, GCP ensures that data and results from clinical trials are valid and reproducible. Goals of the ICH GCP Guideline 5qUy.