Even after you quit using marijuana, metabolites can still be detected for up to one week if you’re an occasional user. If you’re a moderate to heavy user, that period can go up to 4 weeks or even longer. You can speed up the process by engaging in exercise or going to the gym. You can test positive for cannabis in one to three days if you are a casual user. Moderate users may fail a urine drug test for 7 to 21 days. The cannabis might linger in the urine for up to 45 days in heavy users.

The price is 5049, source. In this case, you can request for a urine analysis to be retaken. You should also be aware that some medications can produce false positives, so do inform the tester if you are currently on any medication or over-the-counter drugs. Nowadays, urine tests are a part of pre-employment screening. Urine analysis is the easiest to overcome by flushing your system for the day with a detox drink or permanently with a detox kit. Hair testing is a simple procedure where 1.5 inches of your hair is taken directly from the scalp to draw comparative test results. With this, you can find out when the drug was used, for how long, and when its usage stopped. This test utilizes two tests to confirm a positive result. The first is the enzyme-linked immunosorbent assay (ELISA), and the second test is the gas chromatography/mass spectrometry (GC/MS). Although it can detect drug use for around 90 days, it does not show evidence of recent use because it can take about a week for the traces of THC to become visible in your hair. With this test, you can identify cocaine, marijuana, amphetamines, opioids, methamphetamines, and phencyclidine (PCP). Blood tests are an invasive method that accurately detects THC (even weeks after use) in your system, and it is analyzed in a lab. It detects cocaine, marijuana, amphetamine, opiates, methamphetamines, nicotine, and alcohol 24 hours after drinking. Even if you take a quick puff, THC can be immediately identified in your system for one to seven days. For heavy smokers, the THC trace remains in your blood for quite some time and can be detected for up to two months. One of the most popular types of drug tests is saliva testing. Mouth swabs are used to collect a person’s saliva sample, or you are just asked to spit in a cup. It is a quick and affordable method of drug testing. It reveals alcohol, cocaine, amphetamine, and methamphetamine use within the past few days, except for marijuana, which is detected only for ten hours after use. Mouth swabs provide precise information mainly for very recent use — from a couple of minutes to about 48 hours.