:Normal range
1-2wk after dose: <2.3 nmol/L
72hrs after dose: < 100
If it exceeds these levels, then higher doses of leucovorin or extended rescue nmol/L
1-2wk after dose : <2.3
72hrs after dose: < 100
If it exceeds these levels, then higher doses of leucovorin or extended rescue
Comment: anti-neoplastic agent used in the treatment of many solid tumours, non-Hodgkin’s lymphoma and juvenile acute lymphoblastic leukaemia. Also used for some cases of psoriasis
Sample: Serum, state time of last dose