| Name | levodopa |
| Categories | anti-Parkinson |
| Specimen requirements | 2 ml of serum |
| Procedure remarks | Take the sample at the end of a dosing interval, half-life period: 1-3 h, The half-life period depends on age, height and weight. |
| Methodology | HPLC (high-performance liquid chromatography) |
| Reference ranges | 0.2-2.5 mg/l |
| Remarks | Testing currently takes place in a contract laboratory |