If the person is suddenly exhibiting episodes of short-term memory loss, slow learning, confusion, anxiety and what appears to be toxic delirium. If you suspects marijuana use by that person, this non-invasive drug test kit can provide results in a matter of minutes so that immediate action can be taken. This drug test is based on the principle of highly specific immunochemical reactions between antigens and antibodies, which are used for the analysis of specific substances in biological fluids. The main marijuana metabolite excreted in the urine is tetrahydrocannabinol (THC), which can be detectable for 3 to 10 days after smoking. The test kit contains a THC test cassette, dropper, and instructions for use. Other items required but not provided in the kit are a specimen collection container and a clock or timer. Have the subject of the test collect a urine specimen in the container. Then remove the test disk from its foil packet and placed it on a dry, flat surface. Use the dropper to collect some of the urine specimen. Hold the dropper over the test disk and squeeze two drops of urine specimen into the well located on the disk. Results can be interpreted in 3 to 5 minutes.