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Amitriptyline

Amitriptyline monitoring is part of a comprehensive approach to managing your prescribed medication. Tracking blood levels helps your healthcare team ensure your treatment plan is both safe and effective.

Doctor's Assessment Included

When is this value abnormal?

Decision limits per result, in ug/l
Result Value (ug/l)
Subtherapeutic < 80
Therapeutic 80–200
Above therapeutic range ≥ 200

Dalspiegel (afname vóór de volgende gift). De waarde betreft amitriptyline plus de actieve metaboliet nortriptyline samen. Toxisch: > 300 µg/l.

Source: UMC Utrecht

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

What It Measures

This test measures the concentration of amitriptyline in your blood. It is used to ensure that the dose prescribed by your doctor achieves therapeutic levels while minimising the risk of side effects or toxicity.

Why It Matters

Tricyclic antidepressants like amitriptyline have a narrow therapeutic range. Levels that are too low may not provide adequate symptom relief, while levels that are too high can be associated with serious side effects. Regular monitoring, as directed by your doctor, supports safe and effective treatment.

When to Test

Your doctor may request this test when starting or adjusting the dose of amitriptyline, if side effects are suspected, or to verify adherence to the prescribed treatment plan. Periodic monitoring may also be recommended during long-term use.

Symptoms

Low Levels

Levels below the therapeutic range may indicate subtherapeutic dosing, meaning the medication may not be providing adequate relief. This can be associated with persistent symptoms of the condition being treated. Consult a healthcare professional for interpretation of results.

High Levels

Levels above the therapeutic range may indicate a risk of toxicity. Symptoms can include drowsiness, dry mouth, blurred vision, confusion, cardiac arrhythmias, or seizures. Contact your doctor promptly if you experience any of these symptoms. Consult a healthcare professional for interpretation of results.

Lifestyle Tips

Take amitriptyline exactly as prescribed by your doctor. Avoid alcohol, as it can increase sedation and side effects. Inform your doctor of all other medications and supplements you are taking, as drug interactions can affect blood levels. Do not adjust your dose without medical guidance.

Frequently Asked Questions

Why does my doctor need to monitor amitriptyline levels?
Amitriptyline has a narrow therapeutic window. Monitoring ensures your blood levels are high enough to be effective but not so high as to cause harmful side effects. Your doctor uses this information to optimise your treatment.
Can other medications affect my amitriptyline levels?
Yes, many medications can interact with amitriptyline and affect its blood levels. Always inform your doctor about all prescription medications, over-the-counter drugs, and supplements you are taking.
Should I stop taking amitriptyline if my levels are high?
Never change or stop your medication without consulting your doctor. If your levels are outside the expected range, your doctor will advise you on the appropriate next steps.

Tests with related values

These panels measure values from the same category as this marker.

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SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol Cortisol DHEA-S Estradiol (E2) Free Testosterone FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Total Testosterone Bicarbonate Calcium Chloride Ferritin Iron (Serum) Magnesium Potassium Sodium Transferrin CRP (C-Reactive Protein) Homocysteine Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Omega-3 Index Total Cholesterol Albumin HOMA-IR ALP (Alkaline Phosphatase) AST (Aspartate Aminotransferase) Bilirubin (Total) Total Protein Urea (BUN) Creatinine Vitamin D (25-OH) eGFR (Estimated Glomerular Filtration Rate) Insulin (Fasting) Leukocyte Differential Transferrin Saturation Lipoprotein(a) Triglycerides Basic Blood Count
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Amitriptyline

€49,-