What is the Lorazepam Test?

The Lorazepam test measures the level of lorazepam, a benzodiazepine medication commonly prescribed for anxiety disorders, insomnia, acute agitation and seizure control. Lorazepam works by enhancing the effect of gamma-aminobutyric acid (GABA), producing calming and sedative effects on the central nervous system.

Because benzodiazepines affect cognition, coordination and breathing at higher levels, monitoring may be required in certain clinical situations. Blood level testing is particularly useful when symptoms are unexpected, dosing is complex or drug interactions are suspected.

This test is used in both therapeutic drug monitoring and toxicology assessment.

Why do I need a test for Lorazepam?

You may need this test if there is concern about over-sedation, inadequate therapeutic response or potential drug interactions. Lorazepam levels can vary significantly between individuals due to age, liver function and concurrent medications.

Testing may also be requested in emergency settings, compliance checks or when symptoms such as confusion, excessive drowsiness or impaired coordination occur.

Symptoms and scenarios where testing is recommended:

• Monitoring prescribed lorazepam therapy
• Excessive drowsiness or sedation
• Confusion or memory impairment
• Poor coordination or falls
• Suspected overdose or toxicity
• Drug interaction assessment
• Reduced therapeutic effect
• Investigation of unexplained neurological symptoms

Benefits of the Lorazepam Test

• Supports safe medication use
  Helps prevent over-sedation and toxicity.
• Assesses therapeutic drug levels
  Confirms appropriate dosing.
• Investigates adverse effects
  Helps explain unexpected neurological symptoms.
• Supports compliance monitoring
  Confirms medication presence when required.
• Useful in emergency and acute settings
  Aids rapid clinical decision-making.
• Detects potential drug interactions
  Important when multiple medications are used.
• Applicable across age groups
  Particularly useful in elderly or vulnerable patients.
• Clinically relevant toxicology marker
  Widely used in medication safety assessment.

Step-by-Step: How Testing Works

Choose your preferred testing method

You can attend one of our UK partner clinics or arrange a home or hotel visit with a mobile phlebotomist.

Option 1 – In-Clinic Blood Draw

1. Select your nearest UK clinic and book an appointment.
2. A clinician or phlebotomist collects a venous blood sample.
3. The sample is analysed for lorazepam concentration.
4. Results are delivered securely online.

Option 2 – Home or Hotel Phlebotomy (+£60)

1. Book a UK-wide home or hotel visit at a convenient time.
2. A trained phlebotomist collects your blood sample on-site.
3. The sample is transported to the laboratory.
4. Results are uploaded digitally without the need to travel.

Your Results Explained

Low Levels

Low or undetectable lorazepam levels may indicate under-dosing, missed doses or delayed sample timing.
This may explain lack of therapeutic effect.

Therapeutic Levels

Levels within the expected therapeutic range suggest appropriate dosing.
Clinical response and symptom control should align with results.

High Levels

Elevated lorazepam levels increase the risk of excessive sedation, confusion and respiratory depression.
Urgent clinical review may be required, especially in elderly patients.

UK reference ranges vary by laboratory and clinical context.