At a Glance
Why Get Tested?
To detect and evaluate toxic concentrations of methotrexate
When to Get Tested?
At specific timed intervals after a high dose of methotrexate to monitor blood levels and guide treatment and whenever symptoms suggest methotrexate toxicity
A blood sample drawn from a vein in your arm
Test Preparation Needed?
None, but timing of the sample for testing is important; when having your blood drawn, tell the laboratorian when you took your last dose of methotrexate.