While marijuana itself does not actually stay in the body, some of the chemicals in the drug do. THC (delta-9-tetrahydrocannabinol), the substance in pot that's mainly responsible for people's high, may stay in the body forever � scientists aren't exactly sure. However, THC is only detectable for a certain period of time after using marijuana or being exposed to marijuana smoke.

Compared to other controlled substances, THC is able to stay in a person's system for a relatively long period of time because it is fat-soluble. Being fat-soluble allows it to be stored in fatty tissues of various organs. From here, THC is slowly released and metabolized. This metabolite of THC is then excreted and cleared from a person's system.

In testing to see if someone has recently used pot, there are two important substances to keep in mind: THC and 9-carboxy-THC. 9-carboxy-THC is a product of the body's metabolism of THC and, more importantly, it is detectable for a longer period of time than THC is detectable. This is the reason that drug tests, namely urine tests, look for 9-carboxy-THC.

Many of the following numbers are estimates. The actual amount of time that these substances are detectable in a person's body depends on several factors, including how much pot is used, how often a person uses it, and the rate of his/her metabolism of the substance.

Some private companies may use hair tests to detect possible marijuana use. Positive hair test results have been found to be unreliable.

* Frequent users are defined as people who use marijuana several times per week, if not more often.

** Infrequent users are those who use marijuana seldom enough that THC and/or its metabolite are no longer detectable before their next use. In essence, these users do not use pot often enough to allow for the tested substances to build-up from one use to another.

The detection period for 9-carboxy-THC in urine can be as long as 3 months in extremely heavy users.

THC Marijuana Cannabis Dip Strip Drug Urine Test

Urine Check 7 - Drug Adulteration Test Strips

Saliva 5 Drug Test Kit (THC/COC/OPI/MET/BZD)

Drug Name: Methamphetamine

Drug Abbreviation: MAMP

Drug Slang Term(s): Tina, Christina, tweak, speed, glass, Quartz, uppers, Christmas Tree

Drug Screening Cut-off in Urine: 1,000 ng/mL

Drug Information:

Methamphetamine is an addictive stimulant drug that strongly activates certain systems in the brain. Methamphetamine is closely related chemically to amphetamine, but the central nervous system effects of Methamphetamine are greater. Methamphetamine is made in illegal laboratories and has a high potential for abuse and dependence. The drug can be taken orally, injected, or inhaled. Acute higher doses lead to enhanced stimulation of the central nervous system and induce euphoria, alertness, reduced appetite, and a sense of increased energy and power. Cardiovascular responses to Methamphetamine include increased blood pressure and cardiac arrhythmias. More acute responses produce anxiety, paranoia, hallucinations, psychotic behavior, and eventually, depression and exhaustion.

The effects of Methamphetamine generally last 2-4 hours and the drug has a half-life of 9-24 hours in the body. Methamphetamine is excreted in the urine as amphetamine and oxidized and deaminated derivatives. However, 10-20% of Methamphetamine is excreted unchanged. Thus, the presence of the parent compound in the urine indicates Methamphetamine use. Methamphetamine is generally detectable in the urine for 3-5 days, depending on urine pH level.

Saliva 5 Drug Test Kit (THC/COC/OPI/MET/BZD)

Methamphetamine

Drug Name: MDMA (Ecstacy)

Drug Abbreviation: MDMA

Drug Slang Term(s): x, e, eve, adam, x-tc, roll, triple stacks, decadence, m&m, domex, kleenex, love drug, shabu

Drug Screening Cut-off in Urine: 500 ng/mL

Drug Information:

Methylenedioxymethamphetamine (ecstasy) is a designer drug first synthesized in 1914 by a German drug company for the treatment of obesity.8 Those who take the drug frequently report adverse effects, such as increased muscle tension and sweating. MDMA is not clearly a stimulant, although it has, in common with amphetamine drugs, a capacity to increase blood pressure and heart rate. MDMA does produce some perceptual changes in the form of increased sensitivity to light, difficulty in focusing, and blurred vision in some users. Its mechanism of action is thought to be via release of the neurotransmitter serotonin. MDMA may also release dopamine, although the general opinion is that this is a secondary effect of the drug (Nichols and Oberlender, 1990). The most pervasive effect of MDMA, occurring in virtually all people who took a reasonable dose of the drug, was to produce a clenching of the jaws.

Methamphetamine addiction