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Basic Research and Invention
Characteristics of Drug Research
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addition advertising ampicillin analysis animal tests antibiotics approval average batch brand name brand-name products Butazolidin chapter Chlorpromazine clinical tests Comanor companies compounds consumers cost decline digoxin disease diuretics doctors drug discoveries drug industry drug research drugs introduced economic economies of scale entry equation Erythromycin estimate expected rate expiration gram-negative important IMS America increase large firms large number leading firms Lederle MAC price manufacturers meprobamate million monopoly power multiple-source drugs Nitroglycerine number of prescriptions output penicillin Penicillin VK percent percentage Pfizer pharmaceutical industry pharmaceutical research pharmacists Phenobarbital physicians plant Polycillin Prednisone prescribing price competition price cuts problems profit rate promotional expenditures propanolol public policy quality control quality of drugs R&D expenditures rate of return reduce regulatory period reported reserpine result risk samples single entities small firms Squibb suggests Tetracycline therapeutic classes therapeutic fields therapy tion total sales