Freestyle Libre 14 day User Manual page 40

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Talk to your health care professional about how your insulin works . The
more you understand about your insulin, including how long it takes to
start working and how long it lasts in your body, the more likely you will
be to make better treatment decisions .
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Making a treatment decision doesn't just mean taking insulin . Treatment
decisions can also include things like taking fast-acting carbs, eating, or
even doing nothing and scanning again later .
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Your health care professional can also help you to understand when
doing nothing and scanning again later is the right treatment decision .
For example, if your glucose is high and going up, your first instinct may
be to take more insulin to lower your glucose, however depending on
when you last took insulin or your recent activity, the right treatment
decision may be to do nothing and scan again later . Avoid "insulin
stacking" .
When not to use Sensor Glucose readings for treatment decisions
Glucose is Falling Quickly or Rising Quickly
Sensor glucose values, which are based on interstitial fluid glucose levels,
can be different from blood glucose levels (fingersticks), particularly
during times when your blood glucose is changing quickly . For example
after eating, taking insulin, or exercising . When glucose levels are falling
quickly, glucose readings from the Sensor may be higher than blood
glucose levels . On the other hand, when glucose levels are rising quickly,
glucose readings from the Sensor may be lower than blood glucose levels .
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