The MD-Bio Xylazine Test Strip Kit is the easiest, fastest and most accurate way to detect trace amounts of xylazine (also known as 'tranq') in packaging, pills, on surfaces and more. Once a test has been run, result interpretation is simple! One or two pink lines will appear on the Xylazine Test Strip to indicate whether xylazine has been detected. One line indicates a positive detection for the presence of xylazine. Two lines indicate a negative detection and that xylazine has not been detected.