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How do I set up and use Dexcom ONE alerts?

Last Updated · November 3, 2022

Dexcom ONE gives you the option of turning on alerts when you set up your system. You just follow the prompts on your screen. If you want to turn on or change your alerts after setup, go to Settings > Alerts.

Work with your healthcare professional to customize your alerts to help you achieve your goals. For example, are you worried about insulin stacking – taking doses too close together?

To use your Dexcom ONE as a tool for watching and waiting – and avoiding insulin stacking – your healthcare professional may advise you to turn the Repeat Alert feature in your High Alert setting. That way, when you get a High Alert and confirm it, you will be re-alerted after a time you select. The alert will repeat until your Dexcom ONE readings are back in your target range. Having a repeat alert reminds you to check your readings later to make sure your glucose values have come down.

Important Safety Information!

  • Dexcom ONE alerts will NOT override your phone’s settings. You won’t hear high or low glucose alerts if your phone is set to silent (sound is off). Check your phone’s settings, or you may miss an alert.
  • Alert vibrations feel the same as notifications you get from other apps on your smart device. The only way to know if it is from Dexcom ONE is to look at your smart device.

5-step learning journey

Discover education resources, organised in a 5-step journey, to learn key information about your Dexcom ONE CGM system, from getting started, your first 10 days, to using Dexcom ONE in the long run.

Step 1: The basics of CGM
Step 2: Getting started
Step 3: Your first 10 days
Step 4: Using Dexcom ONE in the long run
Step 5: Understand your Diabetes trends