The McKesson Consult Instant Bluing Tablets are a simple solution to help maintain the integrity of urine samples during drug screenings. These tablets are designed for use in toilet water and turn it a bright blue color to prevent patients from adulterating their urine samples. This deters attempts to dilute the sample or substitute another liquid. To use, simply place one tablet in the toilet bowl or tank before collecting the urine sample. The McKesson Consult Instant Bluing Tablets are a cost-effective and easy-to-use tool to promote reliable drug screening results.