Get to grips with your body’s time line.
Amphetamines 2-5 days
Barbiturates (Short-Acting) 2 days
Barbiturates (Long-Acting) 3-4 weeks
Benzodiazepines 7-10 days
Cannabinoids (THC, Marijuana) 5-60 days
Clenbuterol 4-6 days
Cocaine 1-4 days
Codeine 5-7 days
Euphorics (Ecstasy, Shrooms) 5-7 days
Ketamine (Special K) 5-7 days
LSD – ACID 7-10 days
Methamphetamines 5-7 days
Nicotine (Cigarettes) 4-10 days
Opiates 5-7 days
Peptide hormones undetectable
Phencyclidine (PCP) 2-4 days
Phenobarbital 10-20 days
Propoxyphene 6 hours to 2 days
Steroids (anabolic oral) 14-28 days
Steroids (anabolic parenterally) 1-3 months
How long does marijuana stay in your system is one of the most repetitively asked questions in the internet. Unfortunately, with precision, nobody can tell you exactly how long THC does stay in your body for. The chemical half life of THC concentration ranges between about 1 to 10 days.
Therefore this must show that if THC half life in your body is 5 days and once you begin smoke you have about 100 ml of THC in your urine, 5 days later you will have about 50 ng/ml or less and will be able to pass the test. However, there is too much variation within a human to even approximate how long the actual THC will be detected within the individual’s body. It depends on a myriad of factors, such as the age of the human, the weight, the metabolism and the potency of the actual marijuana. Infrequent uses often leads to the shortest detection time. Chronic users with a slow metabolism will have elongated detection times.
There is a odd phenomena that occurs with chronic users or marijuana. Expecting a chronic user to have the longest detection time and the smallest chance of passing would be the wrong presumption, due to the increasingly high tolerance from the user. Chronic users have tested negative with just a week after binge as lipid tissue makes a huge difference. The best thing to do is to purchase a home drug test, and use it on yourself after you have quit smoking, in order to test your metabolic rate.
The above table is only approximate, so please do not take it as gospel. Although, it is reliable due to the fact it has been researched by various scientists and proved and disproved an uncountable amount of times.