Quality control and quality assurance represent critical pillars of pharmaceutical manufacturing, ensuring that medicinal products consistently meet predetermined specifications for identity, strength, purity, and quality. The pharmaceutical industry operates under stringent regulatory oversight, with agencies such as the United States Food and Drug Administration, the European Medicines Agency, and the World Health Organization establishing comprehensive frameworks that mandate robust quality systems to protect public health. These regulatory requirements, combined with scientific advances in analytical technologies and process understanding, have driven the evolution of sophisticated quality management approaches. This article examines the fundamental principles and contemporary practices of pharmaceutical quality control and quality assurance, encompassing analytical testing methodologies, process validation strategies, documentation systems, and deviation management protocols. The implementation of effective quality systems directly influences patient safety by preventing substandard or falsified medicines from reaching the market, ensures therapeutic efficacy through consistent product performance, and facilitates regulatory compliance across global markets. Key topics include the application of Good Manufacturing Practices, the integration of risk-based approaches, and the role of internal and external auditing in maintaining quality standards. Looking forward, the pharmaceutical industry is embracing Quality by Design principles that embed quality into product development, alongside digital transformation initiatives utilizing artificial intelligence, real-time analytics, and electronic quality management systems that promise to enhance both efficiency and oversight in pharmaceutical quality operations.