No one wants to believe a loved one or family member is addicted to drugs, but addiction is a common problem. Home saliva drug tests kits offer parents and family members a chance to test for drug use without authorities or medical personnel. Saliva drug test kits can test for cocaine, marijuana, heroine, amphetamines, methamphetamines, opiates, phencyclidines and benzodiazephines.How is Saliva Collected and Tested?Home saliva drug test kits use a small amount of saliva collected on a sponge attached to an instant test. The instant test will reveal current drug use within 10 minutes. The swab is then sent away for confirmation testing from an independent lab. Residual traces of drugs stay in saliva for only two to three days, in most cases. Even if the saliva drug test kits result is negat