Are generics a drug on the market?
D000367:Age Factors; D000368:Aged; D003365:Costs and Cost Analysis; D006801:Humans; D007880:Legislation, Drug; D004364:Pharmaceutical Preparations; D012106:Research; D019966:Substance-Related Disorders; D013810:Therapeutic Equivalency; D014481:United States
D004364:Pharmaceutical Preparations