THC comes under the group of cannabinoids that are potent hallucinogens. This is one of the common drugs of abuse with lowest acute toxicity. They produce psychological dependence which makes this as a drug that is hated by employers. It produces, on consumption, a dream like state with disorientation, loss of contact with reality, swaying of field of vision, distortion of images and grotesque appearance of faces. The person can read but can not understand what he is reading. This ultimately leads to decrease in productivity. There are also a lot of chances for errors to occur. This is especially serious in case of high risk and sensitive jobs where every data is important. Poppy test is commonly done by most of the employers for this purpose.
There are certain indications that would help you to opt for poppy testing. Though most of the hallucinogens have similar effects, there are specific effects that are marked for THC. If the suspect is a asthmatic, then there would be marked relief, he or she would show increased appetite and relief from anxiety, etc. some of them may be extremely happy and would laugh uncontrollably, whereas others would be sad and weep.
The test for THC is a simple process that would take only 5 minutes if you buy the home based drug testing kits. All you have to do is to collect the urine sample in a sterile collection cup. Then dip the test strip in the sample up to the indicated level for 10 seconds and leave it on a flat non absorbent surface and wait for another 5 minutes. Then read the results as per the instructions given in the manual that comes with the kit. These kits are approved by the FDA.
The cannabinoid drug testing that is done at home is just a qualitative analysis that merely indicates the presence of the drug in the body. You have to go for other tests that are done in the authorized laboratories. Sometimes the drug in the body goes undetected due to few reasons. If the cut off concentration has not yet been reached then the drug can not be detected.
Testing for cannabinoid can give a false negative result if the person has consumed adulterants or detox products. In such cases, you have to test the sample only after testing the sample for adulterants.