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Freestyle Libre Reader flash glucose monitoring system

Freestyle Libre Reader flash glucose monitoring system

  • 1. Ozempic®️-equivalent therapy now available for weight management
  • 2. Average weight loss of 17%, with 1 in 3 patients achieving over 20%
  • 3. May help reduce osteoarthritis-related pain
  • 4. Wegovy®️ is not expected to impact the effectiveness of oral contraceptives
  • 5. Supports cardiovascular risk reduction
  • 6. Over 22 million patients treated with semaglutide-based therapies since 2018

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What the FreeStyle Libre System Is

The FreeStyle Libre is a flash glucose monitoring (FGM) system, a type of continuous glucose monitoring (CGM) device designed to help people with diabetes track their glucose levels without routine finger-prick tests. Rather than pricking your finger multiple times a day, the system uses a tiny sensor worn on the skin to measure glucose in the fluid just under your skin (interstitial fluid).

How It Works

Reader Device:

  • The FreeStyle Libre Reader is a handheld device you wave over the sensor to “scan” and retrieve your glucose data.

  • It displays:

    • Current glucose level

    • Glucose trend graph (past ~8 hours)

    • Trend arrow showing the direction your glucose is heading (rising/falling/stable)

  • Some versions of the reader also include a built-in blood glucose meter (using test strips) for occasional cross-checks. 

Scan-to-See:

  • To view your glucose, simply scan the reader over the sensor — even through clothing — and in about a second you get your glucose reading.

  • It stores and can hold a lot of historical glucose data (the reader can save up to 90 days of readings) for trend analysis.

Key Benefits

No routine finger pricks for glucose readings (though finger checks may still be needed if symptoms don’t match readings).
Discreet and quick scanning — easy to check levels anytime, anywhere. 
Trend information helps users and healthcare professionals spot patterns and make informed therapy decisions. 

 Important Notes

 While it reduces the need for finger pricks, blood glucose tests may still be required:

  • if sensor readings don’t match how you feel,

  • when the device indicates to check with a meter,

  • or when glucose is changing rapidly. 

 The system doesn’t automatically send alerts unless you scan (unless you’re using a model that supports alarms via app or enhanced reader). 

 Always follow medical guidance and the device instructions for safe use.

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Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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Comparison of Weight Loss Injectables

Features

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Saxenda®

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Active Ingredient Tirzepatide Semaglutide Liraglutide
Mechanism of Action GLP-1 and GIP receptor agonist GLP-1 receptor agonist GLP-1 receptor agonist
Administration Weekly injection Weekly injection Daily injection
Dosage Varies by patient, typically starting low Varies, typically starting at 0.25 mg Varies, starting at 0.6 mg
Effect on Appetite Significantly reduces appetite and cravings Reduces appetite and increases satiety Reduces appetite and increases satiety
Average Weight Loss Up to 20% body weight reduction Up to 15% body weight reduction Significant weight reduction
Side Effects Nausea, vomiting, diarrhoea, constipation Nausea, vomiting, diarrhoea, constipation Nausea, diarrhoea, constipation, hypoglycemia
Approval FDA-approved for weight loss FDA-approved for weight loss FDA-approved for weight loss
Suitable For Adults with BMI ≥30 or ≥27 with comorbidities Adults with BMI ≥30 or ≥27 with comorbidities Adults with BMI ≥30 or ≥27 with comorbidities