Vaginal contamination can produce false positives. In one study comparing urine dipstick to microscopy performed by a nephrologist in the detection of white blood cells (WBCs) in urine ...

A 40-year-old man who was being treated in the ICU after inhalation of car exhaust in a suicide attempt was noted to have red urine. Notes This article was published on March 22, 2025, at NEJM.org.

Drug tests typically involve urine, hair, or blood sample tests, which the tester sends to a lab for analysis. While Ozempic may not show up from standard drug test bloodwork, it may be detectable ...

The A1C test is a blood test that measures the percentage of sugar attached to hemoglobin, a protein in red blood cells. The higher your A1C, the higher your average blood sugar levels have been ...