Methotrexate
The Methotrexate test measures drug levels in the blood to support safe and effective treatment. It is used to monitor therapy and reduce the risk of toxicity.
Turnaround time
Results available 2 days after arrival in lab. Doctor's report sent the day after results available (if required)
Biomarkers count
1
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Home visits require at least 24 hours notice.
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Details about Methotrexate
What is the Methotrexate test?
The Methotrexate test measures the concentration of methotrexate in the bloodstream. Methotrexate is a medication used in autoimmune conditions, inflammatory diseases, and certain cancers, where precise dosing is essential for safety.
Because methotrexate can affect the bone marrow, liver, kidneys, and immune system, monitoring blood levels helps ensure the drug is being cleared appropriately and is not accumulating to harmful levels. This test is part of therapeutic drug monitoring (TDM) in selected clinical settings.
Why do I need a Methotrexate test?
Monitoring methotrexate levels is important to balance treatment effectiveness with safety, especially during ongoing or high-dose therapy.
You may need this test if you:
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Are receiving methotrexate treatment
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Require monitoring during dose adjustment
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Have reduced kidney function
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Experience side effects such as nausea or mouth ulcers
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Are on long-term methotrexate therapy
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Are receiving high-dose methotrexate in hospital care
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Need assessment of drug clearance
Providing dosing time and clinical details improves interpretation.
Benefits of the test
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Supports safe methotrexate use
Helps prevent drug accumulation and toxicity. -
Guides dose adjustment
Supports personalised treatment decisions. -
Important in high-dose therapy
Essential in oncology and specialist care. -
Monitors drug clearance
Especially important in kidney impairment. -
Reduces risk of adverse effects
Enables early detection of unsafe levels. -
Simple blood-based testing
Requires only one blood sample. -
Widely used in specialist practice
Standard in methotrexate monitoring pathways. -
Improves treatment safety
Supports proactive clinical decision-making.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
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Choose your nearest UK clinic
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Attend your appointment
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Blood sample taken at the appropriate time relative to dosing
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Clinical details recorded
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Sample sent to the laboratory
Home or hotel visit (+£60, UK-wide)
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Mobile phlebotomist arranged where appropriate
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Blood sample taken with correct timing
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Sample securely transported to the laboratory
Your results explained
Low / undetectable level
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Methotrexate not detected or very low
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Expected in low-dose weekly therapy
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Suggests appropriate clearance
Therapeutic level
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Methotrexate within expected range
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Target levels depend on dose and indication
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Suggests effective and safe exposure
High level
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Methotrexate above expected range
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Indicates delayed clearance
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Increased risk of toxicity, particularly to kidneys and bone marrow
Target ranges vary significantly depending on dose, timing, and clinical indication.
How It Works
Simple steps to get your results
Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.