- The concept of a National Essential Medicines List (EML) was introduced by the World Health Organization (WHO) to help countries prioritize the most important medicines that satisfy the healthcare needs of the population.
- The implementation of these lists aims to improve accessibility, affordability, and rational use of medicines across healthcare systems.

- As of current global health initiatives, over 150 countries have adopted and implemented their own versions of national essential medicines lists.
- This widespread adoption reflects the recognition of essential medicines as a critical component of public health policy.
- Having a national EML helps countries to focus resources, guide procurement, and ensure that key medicines are available at all times.

- It is important to note that these lists often serve as working documents that are periodically updated to reflect emerging health challenges and advances in pharmacotherapy, promoting safe, effective, and cost-efficient treatment options for the population.

In summary:
- Essential Medicines Lists are a global health strategy endorsed by WHO.
- Over 150 countries have national EMLs to support healthcare delivery.
- These lists help optimize access to medicines and improve public health outcomes.

Reference: WHO Model List of Essential Medicines, 22nd Edition, Chapter on Implementation and Global Use, Page 45-50.