Stock-outs of antimalarials cause unnecessary deaths among an estimated 219 million people afflicted worldwide. Good pharmaceutical information systems can avoid stock-outs with timely, accurate data and high reporting rates that ensure the continuous availability of critically-needed antimalarials. The US Agency for International Development (USAID)-funded Systems for Increased Access to Pharmaceuticals and Services (SIAPS) Program, with support from the US Government’s Presidential Malaria Initiative (PMI), is working with the Government of Guinea to improve the national malaria reporting system. By the end of September 2013, after only a few months of training in all 19 PMI-supported zones, reporting rates had improved significantly, reaching an average completion rate of 85 percent for health facilities during the previous quarter.