| Assay, porphyrin, spectrophotometry, lithium | 26 | — |
| Enzyme immunoassay, carbamazepine | 20 | — |
| Enzyme immunoassay, digitoxin | 21 | — |
| Enzyme immunoassay, gentamicin | 29 | — |
| Enzyme immunoassay, methotrexate | 6 | — |
| Enzyme immunoassay, phenobarbital | 26 | — |
| Immunoassay, anti-seizure drug / Levetiracetam assay | 11 | — |
| Meprobamate test system | 23 | — |