evidence: Home drug tests are a simple and rapid method for detecting the presence of drugs of abuse in a variety of human samples, including saliva, urine, and blood. However, these tests only provide preliminary results and need confirmation from a laboratory test. Furthermore, to be reliable, the tests should be carried out correctly according to the manufacturer’s instructions. Using samples that the test wasn’t designed to analyze, such as food and beverages, is a misuse of the test and results produced from such tests are invalid.