Certain medications can indeed interfere with the accuracy of Dexcom continuous glucose monitoring (CGM) systems, leading to potentially inaccurate glucose readings. It's crucial for users to be aware of these potential interactions to ensure reliable blood glucose management.
Key Medications Affecting Dexcom Accuracy
The interference often occurs because the chemical composition of certain drugs or their metabolites can mimic glucose in the sensor's electrochemical reactions, leading to falsely elevated readings. This means your Dexcom might show a higher glucose level than your actual blood glucose.
Here are the primary medications known to affect Dexcom accuracy:
| Medication | Potential Effect on Dexcom | Important Notes |
|---|---|---|
| Acetaminophen (Tylenol) | Can cause falsely elevated glucose readings. | This effect is primarily observed with high doses of acetaminophen. |
| Ascorbic Acid (Vitamin C) | Can cause falsely elevated glucose readings. | Even common vitamin C supplements can lead to inaccurate readings as the body converts it into a substance the sensor can mistake for glucose. |
| Hydroxyurea | May cause falsely elevated glucose readings. | This medication is often used in chemotherapy and for specific blood disorders. |
| Salicylates (Aspirin) | Can cause falsely elevated glucose readings. | Similar to acetaminophen, this is typically seen with high doses of salicylates, such as those used for therapeutic anti-inflammatory purposes, rather than low-dose daily aspirin. |
Important Considerations
Understanding these interactions is vital for anyone using a Dexcom CGM:
- Consult Your Healthcare Provider: Always inform your doctor and diabetes care team about all medications, supplements, and over-the-counter drugs you are taking, especially if you use a Dexcom CGM. They can provide personalized advice on managing potential interferences.
- Verify Readings: If your Dexcom readings seem unusually high or inconsistent with how you feel, always confirm the glucose level with a traditional blood glucose meter (BGM) using a fingerstick. This is the most reliable way to get an accurate reading when there's a doubt.
- Do Not Discontinue Medication: Never stop taking prescribed medications without first consulting your healthcare provider, even if you suspect they are affecting your CGM readings. Your doctor can help determine the best course of action.
Being proactive and informed about these medication interactions can help you maintain better control over your diabetes management and ensure the reliability of your Dexcom CGM data.
