Dexcom G5 Getting Started Manual page 40

No number, no arrow, no treatment decision: Always use your meter if
you don't have a number and arrow.
Not stacking insulin is important, whether you use your meter, your Dexcom G5, or both.
Insulin Stacking: Don't take insulin doses too close together, or "stack"
insulin. You don't want to go low; wait at least 2 hours between doses.
Sometimes, it's best to watch and wait.
Some users have reported that performance may vary significantly between sensors; pay
attention to how each newly inserted sensor is working for you when deciding whether
to make treatment decisions based on your glucose readings. See the Dexcom G5 User
Guide for more information on what to do if your glucose readings and BG meter values or
symptoms don't match. If your glucose readings don't consistently match your symptoms
or BG meter values then talk to your healthcare professional about how you should be
using the Dexcom G5 to help manage your diabetes. Your healthcare provider can help
you decide how you should best use this device.
Once you and your HCP are comfortable that you're ready to make treatment decisions
using your Dexcom G5! Try it out using these flow charts.
You Decide
38 • Dexcom G5 Mobile CGM System Getting Started Guide