The document discusses the World Health Organization's (WHO) Essential Medicines List. It provides a brief history of the essential medicines concept and the rationale for creating such a list. The WHO first published a Model List of Essential Medicines in 1977 containing 212 medications. The list is updated every two years to guide member countries in selecting medicines that satisfy priority health needs while considering factors like efficacy, safety, cost and availability. The presentation reviews the process for adding medications to the WHO list and highlights some differences between the WHO list and India's national essential medicines list.