| 6079 | Radioimmunoassay, Diphenylhydantoin | Diphenylhydantoin Test System. |
| 6079 | Radioimmunoassay, Diphenylhydantoin | Diphenylhydantoin Test System. |
| K894527 | FPR PHENYTOIN KIT | COLONY LABORATORIES, INC. |
| K811775 | KALLESTAD ANTISERA TO PHENYTOIN | KALLESTAD LABORATORIES, INC. |
| K791896 | CENTRIA PHENYTOIN RIA TEST SET | VENTREX LABORATORIES, INC. |