Pharmacy outlets inside supermarkets sell prescription and over-the-counter drugs, capitalizing on heavy customer traffic. Most supermarkets only carry over-the-counter drugs for impulse purchases at checkouts or displays. In addition to pharmaceuticals, supermarkets offer health foods. Visible and accessible drug displays at checkouts and aisles trigger impulse buying. Purchasing decisions are made by supply officers or store managers, with credit terms of 15-30 days. Drug companies rent supermarket shelf space and checkout displays on a monthly basis.