Drug testing is a common method used to detect substances in the body, specifically in urine, for various purposes such as medical, legal, or employment-related reasons. The tests typically use immunochromatographic assays for rapid detection of drugs and their main metabolites. Below are the 10 most commonly tested drugs and their respective cut-off concentrations.
1. Amphetamines (AMP) – 1,000 ng/ml
What Are They?
Amphetamines are stimulant drugs that increase brain and body functions. They can be taken orally, inhaled, or injected and are commonly known by street names such as "speed," "uppers," "dexies," or "bennies."
How Long Do They Stay in the System?
Amphetamines typically stay in the system for 2 to 6 days after use.
Effects:
They are psychologically addictive and can cause aggression, anxiety, and mood changes after use. The effects can last for about 24 hours.
2. Barbiturates (BAR) – 300 ng/ml
What Are They?
Barbiturates are central nervous system depressants used medically as sedatives, hypnotics, and anticonvulsants. They resemble the effects of alcohol intoxication.
How Long Do They Stay in the System?
Barbiturates are detectable for 3 to 8 days after use.
Effects:
Overuse, especially in high doses over long periods, can lead to physical dependence. Withdrawal can be difficult and prolonged.
3. Benzodiazepines (BZO) – 300 ng/ml
What Are They?
These drugs are typically prescribed for anxiety, sleep disorders, and as sedatives before medical procedures.
How Long Do They Stay in the System?
Benzodiazepines can be detected in urine for 3 to 7 days after use.
Effects:
They cause sedation and relaxation but can lead to dependency with long-term use.
4. Cocaine (COC) – 300 ng/ml
What Is It?
Cocaine is a powerful central nervous system stimulant and a local anesthetic that produces intense energy and restlessness.
How Long Does It Stay in the System?
Cocaine can be detected from 24 to 40 hours after use.
Effects:
It can lead to tremors, spasms, and heightened sensitivity.
5. Marijuana (THC) – 50 ng/ml
What Is It?
Marijuana contains tetrahydrocannabinol (THC), which is its main psychoactive compound. It produces euphoria but can cause behavioral issues with long-term use.
How Long Does It Stay in the System?
THC is detectable for 3 to 10 days after smoking.
Effects:
It can impair cognitive function and motor skills, particularly in regular users.
6. Methadone (MTD) – 300 ng/ml
What Is It?
Methadone is a synthetic opioid used for pain management and as part of opioid dependence treatment programs.
How Long Does It Stay in the System?
It remains in the system for 2 to 8 days.
Effects:
Long-term use can lead to physical dependence, and withdrawal is often prolonged. It is used as a detoxification aid in opiate addiction.
7. Methamphetamine (mAMP) – 1,000 ng/ml
What Is It?
Methamphetamine is a powerful stimulant that has stronger effects than amphetamine, leading to intense stimulation of the brain.
How Long Does It Stay in the System?
Methamphetamine is detectable in urine for 3 to 5 days.
Effects:
The drug is highly addictive and can lead to intense mood swings, aggression, and paranoia.
8. Methylenedioxymethamphetamine (MDMA) – 500 ng/ml
What Is It?
MDMA, also known as ecstasy, is a designer drug that causes feelings of emotional closeness, energy, and euphoria.
How Long Does It Stay in the System?
MDMA can be detected for 1 to 3 days after use.
Effects:
It can cause muscle tension, increased heart rate, and dehydration, along with increased blood pressure.
9. Opiates (OPI) – 2,000 ng/ml
What Are They?
Opiates are a class of drugs used for pain relief. They include drugs like morphine, heroin, and codeine.
How Long Do They Stay in the System?
Opiates are detectable for 2 to 5 days after use.
Effects:
They are highly addictive and can result in respiratory depression, overdose, and death if abused.
10. Tricyclic Antidepressants (TCA) – 1,000 ng/ml
What Are They?
Tricyclic antidepressants are used to treat depression and other mood disorders.
How Long Do They Stay in the System?
They can be detected for up to 10 days after use.
Effects:
An overdose of TCAs is particularly dangerous and is a common cause of prescription drug-related deaths.
Conclusion:
These are the 10 most commonly tested drugs of abuse, and knowing how long they stay in the system can help individuals make informed decisions about their health and well-being. Understanding how drug tests work, and their cut-off levels, can also be helpful for those who undergo drug testing for medical, legal, or employment reasons. Always consult with a healthcare professional for proper treatment and advice regarding drug use and testing.
