Recycling unused drugs.
D003132:Commerce; D011307:Drug Prescriptions / Q000191:economics; D004363:Drug Utilization / Q000191:economics; D006801:Humans; D004366:Nonprescription Drugs / Q000191:economics; D004364:Pharmaceutical Preparations / Q000191:economics; D013219:State Government; D014481:United States
D004366:Nonprescription Drugs; D004364:Pharmaceutical Preparations