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The Food and Drug Administration (FDA) in the USA has issued an alert about the possibility that people with type 1 diabetes who take certain medicines that contain non-glucose sugars might get falsely elevated readings from home blood sugar monitors if they use a specific kind of test strip.

These false high readings could be dangerous, because they might mask low blood sugars or cause people to take excessive amounts of insulin. The test strips in question are GDH-PQQ glucose test strips, and there is a list of medications that might result in incorrect readings – as well as additional information – on the FDA website at

Various companies that manufacture and distribute test strips have posted additional information on their websites, including:

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