| Test name: | Acetaminophen |
| Epic order code: | LAB43 |
| CPT code: | 82003 |
| Specimen(s) type: | Serum |
| Acceptable container(s): |  Top is red |
| Testing schedule: | 24 hrs/day, 7 days/week |
| Turn-around time: | STAT: 1 hour | |
| | Routine: 2 hours | |
| Collection information: | No special patient preparation is required. Obtain specimen by standard collection procedures. |
| Transport information: | Deliver to lab immediately. All specimens must be signed into the laboratory. |
| Reference clients: | If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C. Specimen must be received in the lab within 24 hours. |
| Causes for rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport. |
| Reference range: | Therapeutic: | 10-30 µg/mL | |
| | Toxic: | >50 µg/mL | |
| Additional information: | Bilirubin interference may cause erroneous Acetaminophen results. Amitriptyline and Imipramine show a significant negative interference (> 10 %). |