Abbot Precision Xtra Blood Ketone Test Strips, Box of 10

Precision Xtra Ketone Strips When is it recommended to test? Urine ketone tests using nitroprusside-containing reagents can give false-positive results in the presence of several sulfhydryl drugs, including the antihypertensive drug captopril. False-negative readings have been reported when test strips have been exposed to air for an extended period of time or when urine specimens have been highly acidic, such as after large intakes of ascorbic acid1. Urine testing only gives information about what your blood ketone levels were two to four hours before you tested and it is furthermore dependent on the person being able to pass urine. It is recommended you test your blood ?-Ketone because Ketones are detectable in the blood far earlier than in urine, so blood ?-Ketone testing can give early warning of impending DKA.