Private drug shops can effectively provide contraceptive methods, especially injectables, complementing government services. Most drug shop clients in 4 peri-urban areas of Uganda were continuing users of DMPA; had switched from other providers, mainly government clinics, because the drug shops had fewer stock-outs and were more convenient (closer location, shorter waiting time, more flexible hours); and were satisfied with the quality of services. The drug shops provided a substantial part of the total market share for family planning services in their areas.