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When using the Contour blood glucose monitoring system, it's important to be aware of certain safety considerations to ensure accurate readings and prevent potential risks:

• Single-Patient Use: The Contour meter, lancing device, and lancets are designed for use by one individual only. Sharing these devices can lead to the transmission of bloodborne pathogens.

• Proper Disposal: After testing, dispose of used lancets and test strips in accordance with local regulations for medical waste. This practice helps prevent accidental injuries and environmental contamination.

• Storage Conditions: Store test strips in their original container with the lid tightly closed to protect them from humidity and contamination. Keep the meter and test strips away from extreme temperatures and direct sunlight to maintain their accuracy and functionality.

• Child Safety: Keep the Contour meter and all related components out of reach of children. The device contains small parts that could pose a choking hazard if swallowed.

• Hand Hygiene: Always wash and dry your hands thoroughly before and after testing. This reduces the risk of infection and ensures the accuracy of your blood glucose readings.

• Electromagnetic Interference: Avoid exposing the meter to strong electromagnetic fields, such as those from MRI machines or high-frequency electrical heat treatments (diathermy). Such exposure can damage the device and lead to inaccurate readings.

By adhering to these safety guidelines, you can effectively manage your blood glucose levels while minimizing potential risks associated with the use of the Contour blood glucose monitoring system.

When using a continuous glucose monitor (CGM), it's important to be aware that certain medications and substances can interfere with the device's accuracy. These interferences can lead to incorrect glucose readings, potentially affecting diabetes management decisions.

Acetaminophen (Tylenol): High doses of acetaminophen can cause false high glucose readings in some CGM systems. For instance, the Dexcom G4 CGM has been observed to be affected by acetaminophen, leading to inaccurate glucose measurements. While newer models like the Dexcom G6 have reduced sensitivity to acetaminophen, taking more than the recommended dose (over 1 gram every six hours in adults) could still result in falsely elevated glucose readings.

Vitamin C (Ascorbic Acid): Excessive intake of vitamin C, such as doses over 500 mg per day, may interfere with certain CGM devices like the FreeStyle Libre 2. This interference can lead to inaccurate sensor readings, potentially causing users to miss severe low blood sugar events.

Hydroxyurea: This medication, used for treating certain cancers and sickle cell anemia, has been found to interfere with CGM readings. Users taking hydroxyurea may experience falsely elevated glucose readings, which could result in missed hypoglycemia alerts or errors in diabetes management decisions. It's recommended not to use CGM systems while taking hydroxyurea.

Salicylates (Aspirin): Medications containing salicylates, like aspirin, have been associated with potential interference in CGM readings, particularly with devices such as the FreeStyle Libre 14-day system. This interference may lead to lower glucose readings than actual levels.

Other Substances: Studies have indicated that substances like Lisinopril, Albuterol, Atenolol, and red wine can also interfere with CGM readings, leading to inaccuracies.

To ensure accurate glucose monitoring:

• Consult Healthcare Providers: Discuss any medications or supplements you're taking with your healthcare provider to understand potential interactions with your CGM device.

• Monitor Symptoms: If your symptoms don't align with your CGM readings, consider verifying your blood glucose levels using a traditional fingerstick glucose meter.

• Stay Informed: Regularly review your CGM device's user manual and any updates from the manufacturer regarding potential interferences.

Being aware of these potential interferences and taking proactive steps can help maintain the accuracy of your CGM readings and support effective diabetes management.