Urine tests for drug abuse, opiates, cocaine, marijuana, amphetamines and other stimulants (2023)

April 25, 2023Laboratory testsUrine analysis


(Video) Chemistry: Drug of Abuse Urine Screening Test (DAU)

example of drug abuse

  1. One of the samples is urine.
    1. Urine should be taken in the presence of a technician or doctor.
  2. Saliva test – can be detected in saliva within an hour of use.
  3. Hair follicle test - it is detected in the hair within 5-7 days.
  4. Blood test: This can be detected within an hour of use.

The advantages of the urine test are:

  1. It is easy to obtain a urine sample and it is not an invasive procedure.
  2. Part of the concentration of the drug is found more in the urine, which does not have to be detected in the blood.
  3. Metabolites of the drug are excreted in the urine over a longer period of time, which indicates the previous administration of the drug.
  4. Urine drug test kits are easier and cheaper.

Procedure for obtaining a urine sample for drug abuse:

  1. The patient should wash his hands and wear gloves.
  2. Add bleaching agents to the toilet to prevent falsification of the urine sample.
  3. Avoid all water sources in the toilet.
  4. The patient provides an ID card with a photo.
  5. The patient leaves all his belongings outside the bathroom.
  6. Someone must be present in the bathroom while the patient is giving the sample, or you may be waiting outside the door to hear an unusual sound.
  7. Check the urine volume (30 to 40 mL) and any abnormal color.
  8. The sample is always in front of the eyes of the technician/doctor and the patient.
  9. The date and time are recorded.

Warning for critical patients:

  1. Make sure it has not been altered, such as by substituting, adulterating or diluting the urine.
  2. Prevent unauthorized persons from handling the sample.
  3. Urine collection may or may not be eyewitness.

Precautions for drug abuse:

  1. Urine detects heroin 1-2 hours, maximum 2-5 hours after use.
    1. The minimum concentration should be 2000 ng/ml.
  2. Check urine dilution by measuring creatinine, pH and specific gravity.
  3. The following means give false results:
    1. Sodium chloride.
    2. Dilute urine due to low specific gravity.
    3. Acidic urine due to high pH.
    4. Alkaline urine due to low pH.
    5. Blood in the urine.
    6. Detergents in a container.

Indications for drug abuse.

  1. To diagnose drug abuse.
  2. Intended for athletes, industrial workers and professionals.
  3. It is used in toxicology to confirm a clinical or postmortem diagnosis.
  4. Diagnose and differentiate signs and symptoms of trauma, infectious process, or drug-induced metabolic disorder.
  5. To diagnose psychosis or substance abuse.
  6. It is used in prisoners to detect drug abuse.
  7. It is advised in the workplace for public safety.
  8. routinethe following medicinestried:
    1. Cocaine.
    2. marihuana.
    3. Opiates (narcotics).
    4. methadone.
    5. barbiturates
    6. Benzodiazepines.
    7. Anfetizante.
    8. methamphetamine
    9. tranquilizers
    10. Analgesics.
    11. sympathomimetics.
    12. fenciklidin

Drug abuse tests:

  1. Urine is the best sample for drug abuse and the following tests are recommended:
    1. Hearing. They are simple, cheap and fast.
    2. Confirmatory tests. These are bulky and expensive.

Drug use is divided into:

  1. CNS stimulation:
    1. It causes euphoria, suppresses appetite and accelerates heart rate and breathing.
    2. These are cocaine and its derivatives, amphetamines and methamphetamines.
  2. CZS depressor:
    1. They slow down the heartbeat and breathing and reduce pain.
    2. These drugs are narcotics, sedatives, hypnotics and tranquilizers.
  3. Psychoactive:
    1. These are also hallucinogenic drugs and cannabinoids, and phencyclidine.
  4. Antidepressants:
    1. These drugs include lithium, tricyclic antidepressants, etc.

Prevalence of drug abuse is as follows.

Drug abuse% prevalence
Alcohol75% do 80
marihuana20% do 26
Cocaine5% do 13
Benzodiazepines1% do 5
barbiturates0,5% do 5
get drunk0,1% which is 2
fenciklidin0,1% which is 2
anfetizando0,1% of 1
other stimulants0,8% which is 2
sedative and hypnotic0,6% which is 2

There are several opioids used for addiction:

  1. These are substances with analgesic, sedation and anesthesia.
  2. There is a high potential for addiction.
  3. Chronic use leads to tolerance to physical and psychological dependence.
    1. Acute overdose leads to respiratory acidosis with respiratory depression, myoglobinuria and possible increased indicators of myocardial infarction.
    2. A very high dose of opioids can cause death from heart and lung failure.
    3. Opioid overdose treatment is antagonists such as naloxone.
  4. This is derived from the opium poppy.
  5. Modified opioids of natural origin are:
    1. bride.
    2. Morphine.
    3. Codeine.
    4. Heroin.
    5. hydromorphone.
    6. Oxicodona.
  6. Chemically synthetic opioids are:
    1. meperidina.
    2. methadone.
    3. propoxyphene.
    4. Pentazocin.
    5. fentanyl.
  7. Some of them are:
    1. Heroin.
    2. Morphine.
    3. Oxycodone (Oxycontin).
    4. Hidromorfon (Dilaudid).
    5. Fentanil (Duragesic).
  1. Acetylcholine, an impurity in the synthesis of heroin, has been proposed as an interesting biomarker of illicit heroin use.
  2. Codeine and heroin are metabolized into morphine, which is then excreted in the urine.

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Drug abuse: opium derivatives

  1. The metabolism of heroin shows that it is not an active compound, but becomes active after conversion to 6-acetylmorphine.

Drug abuse: characteristics of heroin

  1. 6-Acetylmorphine and morphine are pharmacologically very active substances.

Substance abuse: Metabolism of morphine

(Video) How long are different drugs detectable in your system - urine testing, hair testing, etc.

  1. Therefore, the detection of morphine in urine may be due to the following:
    1. Some heroin.
    2. Morphine.
    3. Codeine.
    4. Ingestion of poppy seeds.
  2. Heroin can be present in the urine for up to 5 days after the last dose. (Some say 3-4 days).
  1. These are alkaloid salts, which can be injected or insufflated or inhaled as vapors.
  2. The half-life of cocaine is 0.5 to 1 hour. Because of the short half-life, repeated doses are used.
  3. Mechanism of action:
    1. This is an effective local anesthetic with few side effects in a therapeutic dose.
    2. This powerful CNS stimulant leads to excitement and euphoria.
  4. complications:
    1. Acute toxicity is associated with hypertension, epileptic seizures, cardiac arrhythmias and myocardial infarction.
  5. secretion:
    1. The liver product of cocaine is benzoylecgonine, which is excreted in the urine.
    2. The presence of this metabolite in urine is a sensitive and specific indicator of cocaine intake.
    3. It can be detected in the urine for up to 3 days after a single intake.
    4. It can be detected in urine up to 20 days after the last use in chronic cases.

Some drugs and their duration in urine:

dryAfkapwaarde disclosureDuration of disclosure
Heroin2000 ng/ml1 to 2 hours
Cocaine300 mg/dL2 to 4 days
get drunk300 ng/ml2 to 4 days
marihuana50 ng/ml30 to 60 days
anfetizando1000 ng/ml2 to 3 days
methadone300 ng/ml8 to 60 hours
barbiturates200 ng/mlup to 30 days
Benzodiazepines200 ng/mlup to 40 days
Alcohol20 ng/ml12 sati
tricyclic antidepressant1000 ng/ml1 to 3 days
PCP25 ng/ml2 to 3 days
metaqualon300 ng/mlup to 7 days
fenciklidin25 ng/ml<3 dana
LSD (liserginazuurdietilamid)0.5 ng/ml<12 to 24 hours

Signs and symptoms of opioids:

All opioids (morphine, codeine, hydroxymorphine and oxycodone, hydrocodone, hydrocodone) have a common S/S.

  1. Heroin works very quickly.
  2. They have an analgesic effect.
  3. Signs and symptoms are:
    1. Sedation.
    2. Student needed.
    3. Jail.
    4. Euphoria
    5. respiratory depression.
    6. Orthostatic hypotension.
    7. Decreased bowel motility leads to constipation.
    8. There is nausea and vomiting.
    9. Bradycardia.
  4. Morphine overdose (poisoning) leads to:
    1. Come
    2. miosis.
    3. respiratory depression.

Opioid withdrawal symptoms include:

  1. dilated pupil
  2. Tachycardia.
  3. Tearing and runny nose.
  4. Irritability and restlessness.
  5. diaphoresis
  6. These symptoms can be alleviated with methadone (opioid antagonist). Another drug used is clonidine.

Laboratory diagnostics of opioids, several available methods are:

  1. Commercial kits are available.
  2. Gas chromatography. This is one of the accepted methods.
  3. Inhibition of latex agglutination.
  4. Dunnelag chromatography.
  5. radioimunotest (LAUGHTER).
  6. High Performance Liquid Chromatography (HPLC).
  7. Mass spectrophotometry (GC/MS).
  8. radioimunotest (LAUGHTER) is fast and cheap.
    1. Morphine and codeine are found after the use of heroin.
  9. One-time urine testit is enough to diagnose various drugs such as cocaine, opiates, barbiturates, amphetamines, methadone, oxycodone, benzodiazepines, cannabinoids, methadone and tricyclic antidepressants.

treatment with opioids

  1. Treat opioid poisoning with opioid antagonists such as naloxone.
  2. Another antagonist is nalmefene, which is of synthetic origin.
  1. Amphetamine and methamphetamine are therapeutic drugs used to:
    1. Narcolepsy.
    2. Attention Deficit Disorder.
    3. obesity
  2. These are stimulants with a high degree of drug abuse.
  3. Ways of application are:
  4. Amphetamines are readily absorbed from the GIT and are widely distributed throughout the body.
  5. In the liver, they are converted into more polar substances and are easily excreted in the urine.
  6. They are usually excreted within 48 hours.
    1. Orally.
    2. injections
    3. Inhalation.
    4. Insufflation.
  7. Mechanism of action:
    1. Amphetamines are sympathomimetic amines that stimulate the central nervous system and cause excitement.
    2. It increases the release and blocks the uptake of some neurotransmitters.
    3. It causes euphoria and alertness and increases energy.
    4. It causes the loss of apatite and reduces the feeling of fatigue.
  8. Amphetamine complications:
    1. It leads to addiction. Psychological and physiological dependence may develop.
    2. It causes irritability, anxiety and insomnia.
    3. It can lead to blurred vision.
    4. Increases blood pressure and heart rate.
    5. Increases body temperature.
    6. It can cause anxiety, paranoid behavior and psychosis.


  1. Mechanism of action:
  2. To its CNS depressor.
  3. They are used as anxiolytics, anticonvulsants, anesthetics and muscle relaxants.
  4. These drugs bind to GABA receptor chloride channel molecules and cause sedation, mood changes and euphoria.
  5. The duration of action of these barbiturates is divided into:
    1. Short action.
    2. ultra short acting
    3. Long performance.
    4. Temporary job.
  6. After they are absorbed, they are metabolized in the liver.
  7. Oxidation and conjugation of glucuronides will occur.
  8. Method of application:
    1. The most common routes are oral and parenteral.
  9. complications:
    1. Drowsiness may occur.
    2. Mental disability.
    3. ataxia.
    4. dysarthria.
    5. In the case of high doses, it can cause coma and cardiovascular and respiratory depression.


  1. Mode of operation:
    1. It's like barbiturates.
  2. Method of application
    1. They can be given orally or parenterally.
  3. Side effects:
    1. They are like barbiturates, but milder.
    2. There is physical dependence and the patient may experience withdrawal symptoms such as:
    3. Anxiety.
    4. Irritability
    5. Insomnia.
    6. Muscle tension.
    7. Psychosis and seizures.
  4. Metabolism:
    1. In the liver, benzodiazepine is converted into an active and an inactive form.
    2. The half-life of parent drugs is shorter than that of metabolites.


  1. Cannabinoids are found in the hemp plant, from which marijuana is made.
  2. Mechanism of action:
    1. THC is a psychoactive ingredient in marijuana that has a euphoric and relaxing effect, which is why it is abused.
    2. It is very lipophilic and is converted into more than 20 metabolites.
    3. Urinary metabolites 11-nor-Δ9-tetrahydrocannabinol9-Carboxylic acid (THC-COOH) is used for detection in urine.
    4. 70% of THC is excreted in stool and urine in 72 hours.
    5. In addicts, the half-life can be >10 days.
  3. Method of application:
    1. It can be used for inhalation, and it can also be swallowed.
  4. THC is not lethal when used alone.
  5. Side effects:
    1. Some patients may experience side effects such as:
    2. Tachycardia.
    3. Respiratory problems.
    4. Behavioral and mental abnormalities.
    5. Prolonged use causes tolerance and mild withdrawal symptoms.


  1. It is a powerful hallucinogen.
  2. Mechanism of action:
    1. It antagonizes glutamate receptors and can also block dopamine uptake.
    2. This drug is lipophilic, which allows it to be stored longer in the brain and adipose tissue.
    3. Metabolism takes place in the liver via oxidative hydroxylation and conjugation; it is then removed from the kidneys.
  3. Other phencyclidines similar to this are:
    1. cyclohexamine.
    2. Fenilcikloheksilpirolidin.
    3. Thenylcyclohexylpiperidine.
  4. Method of application:
    1. These substances can be taken orally.
    2. intravenously.
    3. Smoked in combination with marijuana or tobacco.
  5. Side effects:These patients may have:
    1. Tachycardia.
    2. paranoia.
    3. Psychosis.
    4. respiratory depression.
    5. There is mydriasis (dilation of the pupil).

Questions and answers:

Question 1:Do you think heroin itself is addictive?

Show answer

Question 2:What is the origin of marijuana?

(Video) Zinc and Drugs Tests | What does Science Say?

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Possible references used

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What can show up as amphetamines in a urine test? ›

The prescription medications known to cause false-positive amphetamine urine drug screen include fluoxetine, selegiline, ranitidine, trazodone, nefazodone, brompheniramine, phenylpropanolamine, chlorpromazine, promethazine, ephedrine, methamphetamine, and labetalol [6–9].

What drugs of abuse does a urine drug screen test for? ›

These tests indicate if one or more prescription or illegal drugs are present in urine. These tests detect the presence of drugs such as marijuana, cocaine, opiates, methamphetamine, amphetamines, PCP, benzodiazepine, barbiturates, methadone, tricyclic antidepressants, ecstasy, and oxycodone.

What are 3 tests that are used to detect drugs? ›

What are the types of drug tests?
  • Urine drug testing (UDT): This is the most common drug test. ...
  • Blood drug testing: Healthcare providers mainly use this type of test in emergencies. ...
  • Hair follicle drug testing: A hair sample can provide information on substance use over time.
Aug 5, 2022

What are the 9 drugs in drug profile urine? ›

A Drug Profile, Urine (Nine Drugs), Immunoassay With GC/MS Confirmation Urine Test Includes: Amphetamines; barbiturates; benzodiazepines; cannabinoids (marijuana); cocaine; methadone (Dolophine); opiates (codeine, morphine only); phencyclidine (PCP); propoxyphene. Preparation: No special preparation required.

What drug makes you test positive for amphetamines? ›

Test results may come back positive if you have taken certain antihistamines, nasal inhalers, or cold medicines. You may also get a false positive if you take certain medicines for depression. These include tricyclic medicines, quetiapine, and bupropion.

What is the most common false positive drug test? ›

Amphetamine (more on this below) and methamphetamine are the most commonly reported false positive.

What are 4 types of tests done on urine? ›

Red blood cell urine test. Glucose urine test. Protein urine test. Urine pH level test.

What is a drug of abuse panel? ›

What is the 7 Panel Drug Test? This drug test (7 panel) screens for basic opiates (codeine, morphine and heroin), expanded opiates (oxycodone and hydrocodone), amphetamines, cocaine, PCP, marijuana and ecstasy. The method used is urine testing, which is the most common type.

What is the difference between a drug screen and a urinalysis? ›

A routine urinalysis does not detect drugs of abuse. A special drugs-of-abuse screening test is used to detect the presence of those substances.

What are the 5 most common drugs tested for? ›

Drugs Tested in the 5-Panel Test

Most 5-Panel drug tests include 5 commonly abused substances: marijuana, cocaine, opiates, amphetamines, and Phencyclidine (PCP). Commercial names for opiates include Codeine, Morphine, and Heroin (6 AM).

What are the two most widely used screening tests for drugs? ›

The most commonly used drug abuse screening tests are:
  • Drug Abuse Screen Test (DAST, also known as DAST-10). ...
  • NIDA Drug Use Screening Tool, also known as the NIDA Quick Screen. ...
  • NIDA Modified Alcohol, Smoking, and Substance Involvement Screening (NM ASSIST). ...
  • Cut-down Annoyed, Guilty, Eye-opener (CAGE).
Jul 27, 2021

What are most commonly used drug test samples? ›

Urine is the most widely used matrix for drugs of abuse testing. The advantages of urine specimen include that it is well known specimen, drugs concentrate in the urine and analytically it is an easy sample to work with.

What is a 10 panel urine drugs of abuse screen? ›

The 10 panel drug test includes marijuana, PCP, amphetamines, opiates (codeine, morphine & heroin), cocaine, benzodiazepines, barbiturates, methadone, propoxyphene, & methaqualone (Quaaludes). This 10 panel does not include Opioids or synthetic opiates such as Hydrocodone, Hydromorphone, Oxycodone and Oxymorphone.

What is the most common type of urine drug test? ›

There are two main types of UDTs— immunoassay drug testing conducted at a laboratory or at the point of care in a provider's office, and laboratory-based gas or liquid chromatography/mass spectrometry.

What is a common 10 panel drug test? ›

What Is A 10-Panel Drug Test? A 10-panel drug test screens for ten different types of illegal substances and commonly abused prescription drugs, like Adderall and Xanax. An expanded 10-panel screening identifies the same substances plus additional opiate types, such as Oxycodone.

Can ibuprofen cause a false-positive for Benzos? ›

These data, collected prospectively, demonstrate the small likelihood of a false-positive immunoassay test result for cannabinoids, benzodiazepines, or barbiturates after the acute or chronic ingestion of ibuprofen, or after the chronic ingestion of naproxyn or fenoprofen.

How long will ibuprofen show up on a drug test? ›

After ingestion of one single oral dose of 400 mg ibuprofen, the parent compound could be detected for 27 to 34 h, hydroxy ibuprofen for 34 to 40 h and carboxy ibuprofen for 5 to 6 d.

Can Abilify cause a false-positive for amphetamines? ›

Highlights. Aripirazole can cause false positivity (FP) for amphetamine in urine drug screen. Urine amphetamine values showed a proportional trend to the dosage of Aripiprazole. Misinterpretation of data can condition therapeutic choices.

How do you challenge a false positive drug test? ›

Simply ask if you can take another test. Many will have no problems accommodating your request. It helps to present evidence as to why you tested positive the first time. As already mentioned, a letter from a doctor or pharmacist regarding a prescription medication will help.

What percentage of drug screens are false positive? ›

A worry for anyone undergoing an illicit drug screen - whether it be a urine, hair, saliva or blood test - is the possibility of a false positive drug test. In fact, some data suggests 5 to 10 percent of all drug tests may result in false positives and 10 to 15 percent may yield false negatives.

Can ibuprofen cause false positive on drug test? ›

Nonsteroidal anti-inflammatory drugs (including ibuprofen and naproxen) (2,3) as well as proton pump inhibitors (specifically pantoprazole) (3) have been reported to cause false positives on urine drug screens.

What is a urine test that tests for everything? ›

Overview. A urinalysis is a test of your urine. It's used to detect and manage a wide range of disorders, such as urinary tract infections, kidney disease and diabetes. A urinalysis involves checking the appearance, concentration and content of urine.

What are the list of urine drug tests? ›

Available urine drug screen rapid tests range from one to nine drugs including:
  • Amphetamine.
  • Methamphetamine.
  • Ecstasy.
  • Marijuana metabolite.
  • Cocaine.
  • Opiates (codeine, morphine, hydrocodone/hydromorphone)
  • Oxycodone/oxymorphone.
  • Phencyclidine (PCP)

Which one of the following substances is normally found in urine? ›

Urine has large amounts of nitrogen, phosphorus, and potassium. Nitrogen content in urine is high, mostly in urea, which makes up more than 50 percent of the total organic acids. This includes urea from protein metabolism, sodium and potassium both of which come from food.

What drugs are on a drug of abuse panel 9? ›

Drugs of Abuse Panel- 9 detects the presence or absence of 9 commonly abused medicines like morphine, amphetamine, barbiturates, methadone, phencyclidine (PCP), benzodiazepine, marijuana, cocaine, and methamphetamine.

What is on labcorp drug of abuse 10 panel? ›

Test Includes

Amphetamine; barbiturate; benzodiazepines; cocaine (and metabolite); creatinine; methadone; opiates; oxycodone/oxymorphone; pH; phencyclidine (PCP); propoxyphene; tetrahydrocannabinol (THC).

What are common panel drug tests? ›

The 5-Panel Drug Test, which screens for: cocaine, marijuana, amphetamine, opiates, and PCP. The 10-Panel Drug Test, which screens for: the drugs included in the 5 Panel Drug Test plus barbiturates, benzodiazepine, methamphetamine, ecstasy/MDMA, and methadone.

What is the most accurate drug test? ›

Blood testing is expensive and invasive, but is the most reliable for determining if the individual is under the influence of drugs or alcohol right now. Hair testing has the longest detection window, nearly 90 days, and is the least invasive method of all, but also has the highest cost.

What is a urine MCS? ›

Urine Culture (MCS) – Urine microscopy, culture, and sensitivity is a laboratory test that analyses urine specimens, isolating microorganisms (bacteria and fungi) or parasites causing infections in the body while deducing the right drug to kill those isolated organisms.

What does SG stand for in a urine test? ›

The urine specific gravity test is easier and more convenient, and is usually part of a routine urinalysis . The urine osmolality test may not be needed. The normal range for urine specific gravity is 1.005 to 1.030.

What is the most common way to test for drugs? ›

Urine Test. The urine test is the most common method used to detect illicit drugs. The "pee-in-a-cup" sample collection is non-invasive; it doesn't involve the use of needles. Urine samples can contain high concentrations of parent drugs (drugs being tested for) and drug by-products.

What is the best way to identify a drug? ›

The best way to recognize street drugs is to familiarize yourself with drug images, such as those offered by the Drug Enforcement Administration. But the only way to positively identify a drug is to have it professionally tested.

What is the most common type of drug test used by employers? ›

Urinalysis – A urine test is the most common form of pre-employment drug testing and is typically conducted once a conditional offer of employment has been sent. A urine test can show traces of drug use even after the effects of the drug have worn off and remain in the body for an extended period of time.

What is drugs of Abuse panel 12 drug panel? ›

12 Drug Panel Test is an easy urine test that detects the presence and levels of 12 different drugs in the body. This test finds out drugs such as Cocaine, Marijuana, Opiates, Amphetamines, Methamphetamines, Phencyclidine (PCP), Benzodiazepines, Barbiturates, Methadone, Oxycodone, Propoxyphene, and Ecstasy.

What is a drug abuse panel 10 50? ›

Included Tests

Amphetamines (1000 ng/mL screen), Barbiturates, Benzodiazepines, Cocaine Metabolites, Marijuana Metabolites (50 ng/mL screen), Methadone, Methaqualone, Opiates, Phencyclidine, Propoxyphene, and Alcohol and Ethyl.

What is a 12 panel urine screen? ›

A typical 12-Panel Urinalysis Drug Screen tests for active components in 10 different substances, including amphetamines, barbiturates, benzodiazepines, cannabis, cocaine, methadone, methaqualone, opioids, phencyclidine, and propoxyphene.

What are the 6 types of urine specimen? ›

Types of urine specimens:
  • First morning specimen.
  • Single random specimen.
  • Timed short-term specimens.
  • Timed long term specimens: 12 or 24 hours.
  • Catheterized specimen or specimen from an indwelling catheter.
  • Double voided specimens (test for sugar and acetone)

How long does Delta 8 stay in your system? ›

Because their structures are similar, delta-8 is expected to stay in the body for the same amount of time as delta-9 THC. For occasional users, this could be as little as 2 to 5 days. For regular users, it could be up to 15 days.

How long does it take for a urine test to come back from the lab? ›

The results of a urine drug test are generally available within a few business days after the test is taken.

How common is a negative dilute drug test? ›

Healthy people rarely produce specimens with creatinine levels below 20mg/dL. In one study of over 22,000 people, less than 1% had dilute specimens. The average creatinine level was 130mg/dL. In a setting like ours where people are randomly drug tested, dilutes are 10 times more common!

What can cause a false positive on a urine drug screen? ›

Clinically, a false positive urine drug screen can be due to numerous xenobiotics: dextromethorphan, diphenhydramine, doxylamine, ibuprofen, imipramine, ketamine, meperidine, venlafaxine, buproprion, methylenedioxpyrolvalerone (MDPV), and tramadol.

Which test turns orange for amphetamines? ›

Marquis reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds.
d-AmphetamineStrong reddish orange – dark reddish brown
d-MethamphetamineDeep reddish orange – dark reddish brown
48 more rows

How do I dispute a false positive drug test? ›

Simply ask if you can take another test. Many will have no problems accommodating your request. It helps to present evidence as to why you tested positive the first time. As already mentioned, a letter from a doctor or pharmacist regarding a prescription medication will help.

How do you get a false negative on a urine drug test? ›

False-negatives can occur when the urine drug concentration is below the threshold level set by the laboratory performing the test. Dilute urine, the duration of time between ingestion of the drug and time of testing, and the quantity of the drug ingested may affect the occurrence of false-negatives.

What can cause a negative urine drug test? ›

Causes of potentially inappropriate negative UDT results include limited assay specificity, absence of drug in the urine, presence of drug in the urine, but below established assay cutoff, specimen manipulation and laboratory error.

What tests are used to test for opiates? ›

Opioid testing can be performed on a sample of your blood, hair, saliva, sweat, or urine. Testing for opioid use may be performed for a variety of reasons, including employment testing and when monitoring you for prescription drug misuse.

Do ADHD meds test positive for amphetamines? ›

Methylphenidate is a stimulant medication used to treat ADHD. Many sources state that methylphenidate can cause false positive results for amphetamines. But research shows this isn't true. If you're prescribed methylphenidate for ADHD, you shouldn't have to worry about having a positive drug result for amphetamines.

Can antidepressants test positive for amphetamines? ›

Bupropion, such as Wellbutrin: Antidepressants that use bupropion as their active ingredient could produce a false positive result for amphetamine or methamphetamine.

Can gabapentin give a false positive drug test? ›

Additionally, we observed an amphetamine interference that produced potential false-positive results for several patients. Upon investigation, it was found that these results were correlated with the presence of high levels of gabapentin.

What will buspirone test positive for? ›

Buspirone hydrochloride may interfere with the urinary metanephrine/catecholamine assay. It has been mistakenly read as metanephrine during routine assay testing for pheochromocytoma, resulting in a false positive laboratory result.

Can you retest a positive drug test? ›

Once your prospective employer notifies you that your drug test was positive, you can request that the specimen be retested. If the lab collected a split specimen sample, the lab will retain the second sample for potential retesting when the initial sample tests positive.

How do I know if I passed my drug test? ›

How do you know if you passed a pre-employment drug test? If the drug test results are returned as negative that means no evidence of the substance was detected in the specimen. If the test shows a positive result, that generally means evidence of the substance was detected.

What happens if a drug test comes back positive? ›

If a drug test result is positive, it means that one or more drugs were found in amounts that suggest drug use or misuse. Positive tests require follow-up testing because they may be wrong (false positives). The follow-up test is usually a test that provides more accurate results.


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