| 6190 | Theophylline Control Materials | Clinical Toxicology Control Material. |
| 6190 | Theophylline Control Materials | Clinical Toxicology Control Material. |
| K920223 | CHEM CHEX THEOPHYLLINE CONTROL | STRECK LABORATORIES, INC. |
| K914251 | MODEL IRC PASSPORT NEBULIZER | INVACARE CORP. |
| K903924 | BIOTRACK THEOPHYLLINE QUALITY CONTROLS | BIOTRACK, INC. |
| K871589 | THEOPHYLLINE FPIA CONTROLS | SIGMA CHEMICAL CO. |