Medicines are indispensable to improving health and saving the lives of people who need them. To be fully effective and safe, they must also be correctly prescribed and appropriately used.From 2011 to 2018, the USAID-funded Systems for Improved Access to Pharmaceuticals and Services (SIAPS) Program worked to ensure equitable, affordable access to safe, quality-assured medicines and related services in 46 countries throughout Africa, Asia, Europe, Latin America and the Caribbean, the Middle East, and Oceania.