Table 3.
Antibiotic Formulations in the Sample With 2 or Fewer Manufacturers
| Drug | Number of Manufacturers, 2013 | Number of Manufacturers, 2016 | Year of US Food and Drug Administration Approval |
|---|---|---|---|
| Fosfomycin trometamol 3 g/ packet | 1 | 1 | 1996 |
| Erythromycin 250-mg tablet | 1 | 1 | 1972 |
| Erythromycin 500-mg tablet | 1 | 1 | 1972 |
| Erythromycin ethylsuccinate 400-mg tablet | 1 | 1 | 1975 |
| Dicloxacillin 250-mg capsule | 2 | 2 | 1968 |
| Dicloxacillin 500-mg capsule | 2 | 2 | 1968 |
| Cefaclor 250-mg capsule | 2 | 2 | 1979 |
| Cefaclor 500-mg capsule | 2 | 2 | 1979 |
| Penicillin VK 125-mg/5 mL solution | 2 | 2 | 1968 |
| Penicillin VK 250-mg/5 mL solution | 2 | 2 | 1968 |
| Azithromycin 1-g powder packet | 1 | 1 | 1994 |
| Linezolid 100-mg/5 mL suspension | 1 | 2 | 2000 |
| Doxycycline 40-mg capsule | 2 | 1 | 2006 |