Antibiotic resistance Widespread use of penicillin responsible for increases in antibiotic resistance Every dose of antibiotics breeds more resistant bacteria Use of antibiotic drugs imposes a negative externality Despite this negative externality,the use of some antibiotic drugs may still be socially efficient But in some cases,the social costs of antibiotic use can outweigh benefits Bhattacharya,Hyde and Tu-HealthEconomicsBhattacharya, Hyde and Tu – Health Economics Antibiotic resistance  Widespread use of penicillin responsible for increases in antibiotic resistance  Every dose of antibiotics breeds more resistant bacteria  Use of antibiotic drugs imposes a negative externality  Despite this negative externality, the use of some antibiotic drugs may still be socially efficient  But in some cases, the social costs of antibiotic use can outweigh benefits