Acetaminophen (Tylenol) Elevates CGM Blood Glucose Results
A word of warning for anyone who wears a continuous glucose monitor (CGM): Taking the pain reliever acetaminophen (Tylenol) can falsely elevate the device’s readings. In a study, CGM readings were compared with finger-stick results for 40 CGM wearers who had taken 1,000 milligrams of acetaminophen. (While the study used Dexcom sensors, Medtronic also warns about acetaminophen use.) Three people had a meter value of less than 70 mg/dl while their CGMs read higher — a difference of 133 mg/dl in one case. Ten had CGM readings over 180 mg/dl while their meters read 100 mg/dl or lower. These differences lasted for up to eight hours after taking acetaminophen.
Source: Diabetes Care, published online Aug. 12, 2015