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Also known as: MTX [Often referred to by brand name (see MedlinePlus Drug Information)]
Formal name: Methotrexate

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

Sample Required?

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.