PIA AT NATIONAL DRUGSTORES CONVENTION: Senator Pia S. Cayetano scans the audience while delivering her keynote speech at the 11th National Convention of the Drugstores Association of the Philippines (DSAP) at the Waterfront Hotel in Cebu City last Sept. 6, 2007. Sen. Pia is set to file a bill that would mandate drug stores and manufacturers to share the burden of absorbing the cost of the 20-percent discount privilege on medicines purchased by senior citizens and the differently abled.