Most cheaters are caught, and indeed most diluted samples still come back positive, despite the use of diuretics or high concentrations of water in the sample Ways To Pass A Hair Follicle Drug Test Lastly, amphetamines will show in the blood for 12 hours Lastly, amphetamines will show in the blood for 12 hours. A drug with a longer half-life will take more time to leave your system Beware: drug urine levels can fluctuate up and down during the day In contrast, some states have statutes that specifically prohibit the manufacture or distribution of drug masking products Although heroin leaves the system quickly, it creates metabolites that can stick around longer Alternatives: The shortcomings of drug testing can be avoided by performance tests that measure actual concentration and reaction time instead of chemical residues Alternatives: The shortcomings of drug testing can be avoided by performance tests that measure actual concentration and reaction time instead of chemical residues. The Facts The chances that cheating on a urine test will result in a negative test are exceptionally unlikely Posing as a federal employee looking for ways to hide his purported cocaine and marijuana use in an impending drug test, our agent asked the sales representatives for each of these vendors for information on products that would enable him to pass a drug test Because it is so potent, fentanyl can be extremely dangerous Every attempt has been made to maintain the structural and data integrity of the original printed product How To Use Synthetic Urine To Pass A Drug Test But tests can detect chemicals that your body produces as it breaks down the remaining meth But tests can detect chemicals that your body produces as it breaks down the remaining meth. This approach should be used only as a last resort, since any adulterant can be chemically detected if labs take the trouble to do so They also asked about testing procedures, such as whether tests are conducted randomly or are announced in advance, and whether individuals providing urine samples are closely monitored For example, employers may require that you pass a drug test before starting a job Heroin will show in the blood for up to days .

Heroin will show in the blood for up to days

What is the science behind why diluted urine tests come back positive? Even though a urine sample is diluted, chances are excellent that there will still be enough of a tested drug or its metabolites in the sample to produce a positive result What is the science behind why diluted urine tests come back positive? Even though a urine sample is diluted, chances are excellent that there will still be enough of a tested drug or its metabolites in the sample to produce a positive result. Females and males process substances differently due to differences in body weight, length, surface area, cellular water levels, and hormones The most significant factors that influence how long drugs stay in your system include: Bodyweight and mass Physical activity and metabolic rate Type and amount of drug consumed Amount of water or other drugs in the system Frequency of use and dosage Tolerance to the substance Even your sex can affect how long substances remain in your system Chairman and Members of the Subcommittee: I am pleased to appear before you today to discuss the ease with which the public can obtain products that are marketed, designed, and sold to defraud urine drug use screening tests such as those administered in the Federal Workplace Drug Testing Program Blood tests detect the actual presence of THC in the system; however, they can be sensitive to other metabolites as well What Is The Best Shampoo To Pass A Drug Test

Many people wash themselves out for several days in advance by drinking a lot and exercising, but there is no reason to think this is useful

The initial rush lasts for about 30 minutes, and the high that follows can last for several hours The initial rush lasts for about 30 minutes, and the high that follows can last for several hours. LSD will show in the blood for up to hours When our investigator reported that he used marijuana and cocaine on a daily basis and that he was subjected to random drug tests, they recommended that, if he would not be closely monitored when he provided a specimen, he purchase synthetic urine or adulterants that are added to a urine specimen Internet Businesses Tout Success of Masking Products: To determine how businesses market drug masking products on the Internet, our investigator conducted an Internet search using the words "pass drug test We are sorry having to mention these devious techniques, but feel it is necessary to defend innocent people against wrongful accusations of drug abuse But different types of drug tests can pick up substances in the system for varying amounts of time But different types of drug tests can pick up substances in the system for varying amounts of time. They enhance excretion of sodium, potassium, calcium and chlorine ions The herbal tea was prepared in 1 gal of water as specified by the manufacturer Laboratories will also routinely test samples for both creatinine and specific gravity Blood tests generally register positive for just a few hours after smoking, though heavy chronic smokers may be positive for up to seven days Can You Pass A Drug Test By Drinking Certo Methamphetamine, often referred to as ice or crystal meth , is a stimulant with a rapid onset Methamphetamine, often referred to as ice or crystal meth , is a stimulant with a rapid onset. Please E-mail your comments regarding the contents or accessibility features of this document to Webmaster gao The average half-life of the drug is about 4 hours Lysergic acid diethylamide is the official name of the drug that most people know as LSD Share this: Specific gravity refers to the amount of water in urine compared to other substances and is another measure of concentration Specific gravity refers to the amount of water in urine compared to other substances and is another measure of concentration. .

Whether or not you have a prescription, you can put yourself in danger by taking too much Adderall or using it without medical supervision Both workouts and hour pre-test fasting have been debunked as legitimate methods of preventing a drug test from detecting the use of THC or other drugs Sponsored Content You can boost your fluid output by taking diuretics, which stimulate urination Cramer at or Paul Desaulniers at Can You Water Down Pee To Pass A Drug Test This substance is especially dangerous when you combine it with other drugs This substance is especially dangerous when you combine it with other drugs. Activated charcoal, a common detoxifier, might help lower metabolite levels a bit in long-term users if taken over the course of some days or weeks The average half-life of heroin is approximately 30 minutes

It used to be that ibuprofen Advil, Motrin, Nuprin interfered with the marijuana test, but this problem has been fixed

Medically, the consensus of expert opinion is that drug tests are an inherently unreliable indicator of drug impairment Consensus Report, National Institute on Drug Abuse, Journal of the American Medical Association, Nov

We will be pleased to respond to any questions that you or the other members of the Subcommittee may have According to the U According to the U. The window of detection for Adderall in toxicology screenings is as follows: Urine — 48 to 72 hours Blood — Up to 46 hours Saliva — 20 to 50 hours Hair — Up to 90 days How Long Does Fentanyl Stay In Your System Fentanyl is a synthetic opioid that is up to times more potent than morphine Currently, the federal government relies solely on urine drug tests, which have a high degree of accuracy, low costs, and relatively unobtrusive method of collection Of course, a visual inspection can often point to dilution Following all treatments with excess fluid, creatinine and specific gravity dropped in 1 Home Remedies For Passing A Urine Drug Test For Opiates If you are on the job market, it is prudent to expect being tested and avoid marijuana If you are on the job market, it is prudent to expect being tested and avoid marijuana. Lastly, meth will show in saliva for up to two days If you take the drug for pain, you might stop feeling the therapeutic effects hours before the drug is fully eliminated from the body The drug detection times listed above are based on the last dose .

In medicine, diuretics are used to treat heart failure, liver cirrhosis, hypertension and certain kidney diseases In that case, the vendor placed an advertisement in a magazine for a novelty store he owned which read: "Taking a drug test? Want to cleanse your system? In upholding the conviction, the Court relied on, among other things, the advertisement the defendant placed rather than a determination whether the product effectively masks drug use In that case, the vendor placed an advertisement in a magazine for a novelty store he owned which read: "Taking a drug test? Want to cleanse your system? In upholding the conviction, the Court relied on, among other things, the advertisement the defendant placed rather than a determination whether the product effectively masks drug use. We are referring the results of our investigation to appropriate law enforcement authorities and thus are not naming the sources from which our purchases were made We will address that in each section below Another tack used by some people is to tamper with the sample by adding adulterants or substituting clean urine for their own However, of these states, only Illinois and Oklahoma prohibit the sale of synthetic urine How To Use Sure Gel To Pass A Drug Test Mass drug screening violates the privacy of the majority of responsible employees in order to spot a minority of alleged drug abusers, many of whom are in fact not drug abusers at all Mass drug screening violates the privacy of the majority of responsible employees in order to spot a minority of alleged drug abusers, many of whom are in fact not drug abusers at all. This drug is also highly addictive Using the store locator function on one of the Web sites, we identified a store in the Washington, D

In contrast, some states specifically prohibit the manufacture, marketing, or distribution of drug masking products

We began our work by searching the Internet to obtain an overview of the array of products available to mask drug use and located several Web sites that tout products that are used to mask the presence of illegal drugs when a urine drug test is administered

By the time subjects had consumed 2 qt of any fluid, they were generally producing false-negative results When our investigator said that he occasionally used marijuana and cocaine, the representatives recommended he purchase herbal supplements and minerals to be taken orally prior to the drug test A positive dilute drug test result refers to a urine specimen that tested positive for a particular drug metabolite in the urine where the sample also contained a higher concentration of water than the average human excretion Additionally, our investigator found some Web sites that provide an interactive format for prospective customers to find out which products best meet their individual needs Additionally, our investigator found some Web sites that provide an interactive format for prospective customers to find out which products best meet their individual needs. Scientists can point to no standard limit on water to avoid dilution While the store also carries synthetic urine, the owner advised us that the detox drinks are more popular and sell better It might make it more challenging to test for substances like THC, but it also warns labs and employers that something is wrong What factors can influence the outcome of a diluted urine test? Several factors can affect the outcome of a diluted urine test Where To Buy Shampoo To Pass A Drug Test Extended-release formulas can have a half-life of up to 5 Extended-release formulas can have a half-life of up to 5. In addition to relieving physical discomfort, the drug produces drowsiness, relaxation, and euphoric feelings In summary, we found that products to defraud drug tests are easily obtained Although the drug is available with a prescription, most cases of harm and deaths associated with fentanyl are associated with illegal versions of the drug The Myths Advice on beating a drug test is increasing at an equally stunning rate, but most of it untested and untrue According to the vendors, these substances detoxify or cleanse the urine if taken before a test is conducted According to the vendors, these substances detoxify or cleanse the urine if taken before a test is conducted. Surveys of drug testing labs have found remarkably high error rates from poor quality control Aside from launching a legal challenge, your best defense against urine testing is to be clean The average half-life of LSD is about 5 You should not take it for an extended period of time For most people, the effects of LSD, which may include hallucinations and euphoria, peak within 2 to 3 hours For most people, the effects of LSD, which may include hallucinations and euphoria, peak within 2 to 3 hours. MDMA is the scientific term for a drug that is sometimes called Molly or ecstasy .

Low ceiling diuretics is the terms used to indicate a pharmacological profile with rapidly flattening dose effect curve in contrast to "high ceiling", where the relationship is close to linear And hair follicle and oral fluid testing can be nearly impossible to cheat

Vendors often exaggerate product reliability and ignore customer complaints

However, recognizing that many of you may face drug testing on short notice, we offer the following advice for emergencies with our best wishes but no promises! The standard procedure is to first screen the samples with an immunoassay test e However, recognizing that many of you may face drug testing on short notice, we offer the following advice for emergencies with our best wishes but no promises! The standard procedure is to first screen the samples with an immunoassay test e. This drug produces euphoria and enhances your ability to perceive sensations Your body excretes some meth without metabolizing it at all According to the product instructions, a urine specimen should be poured into the bag, mixed with the chemicals, and then poured into the specimen cup For one of his customers, he special orders certain products Rothchild, S Rothchild, S. In contrast, negative cocaine results reverted to positive quickly after the dilution effects disappeared Thiazides such as hydrochlorothiazide, cause moderate diuresis A positive dilute result will result in the same actions as a positive test result Potassium sparing diuretics such as amiloride, triamterene and spironolactone do not promote the secretion of potassium into the urine; thus potassium is spared and not lost as much as in other diuretics Smoking or injecting the drug produces effects within seconds Smoking or injecting the drug produces effects within seconds. Weak diuretics include coffee, cranberry juice, certain health food products and over-the-counter pills for premenstrual water retention .

Before we discuss the specifics for various drugs, it is important to note that your metabolism, any existing medical conditions, and history of substance use can affect how long drugs remain in the body For example, in Nebraska it is illegal to provide bodily fluids for the purpose of altering the results of tests to determine the presence of drugs To further investigate how these businesses market drug masking products, our investigator placed telephone calls to some of them However, the 4th Amendment does not generally apply to tests by private employers However, the 4th Amendment does not generally apply to tests by private employers.

This product is a bag that contains two chemicals: one chemical is supposed to destroy the drug toxins and another purports to destroy traces of the first chemical

Both, for example, require direct observation during collection

If you or a loved one are struggling with substance abuse, contact us to find out how we can help Computer video game tests that detect impairment due to drugs, fatigue, stress, or illness are now available on the market DRUID Code Ann It may be reproduced and distributed in its entirety without further permission from GAO Water is fine — contrary to popular rumor, there is NO evidence that goldenseal, vinegar, niacin, or vitamin C help In contrast, in some states such as South Carolina, Arkansas, North Carolina, Oklahoma, Illinois, and Maryland, it is illegal to sell urine or adulterants Osmotic diuretics like mannitol, glucose and other sugars are filtered in the kidneys, but cannot be reabsorbed leading to elevated water elimination with urine Accessibility features, such as text descriptions of tables, consecutively numbered footnotes placed at the end of the file, and the text of agency comment letters, are provided but may not exactly duplicate the presentation or format of the printed version In our research of reported cases we found two cases in South Carolina in which individuals have been prosecuted for the sale of masking products It was concluded that excess water ingestion can produce false-negative test results, but the claims of herbal products to be an aid in passing a urine test appear to be unfounded Drugs and Their Half-Lives Every drug has a specific half-life .

Depending on the drug, drugs will show in blood for different amounts of time Cocaine will show in saliva for up to three days after the last use We understand that a chemical dependency is tough to break, and we provide customized, well-rounded treatment options to help you get on the road to recovery However, high-dosage aspirin may reduce the sensitivity of the EMIT urine test for pot only While each vendor offered a number of products, most of the sales representatives tailored the particular type of masking product they recommended to information they elicited from the investigator about his purported drug use Diuretic abuse in sports is unethical and dangerous for athlete health dehydration Drugs are detected, and the consequences are the same Lastly, MDMA will show in urine for days Get Started What is a positive dilute drug test, and how does it work? Dilution refers to the process of reducing the acidic content of a urine specimen by excessive fluid consumption to manipulate a negative result on a drug test That can tell the person who is analyzing the drug screening a great deal about your usage An hour or two before the test, you should fill your bladder with fluids — as much as you can drink Even after the substance is no longer detectable in your bodily fluids, however, its metabolite can show up in urine tests for up to five days .

The sales representatives of the businesses we contacted assured our investigator that the products they sold would enable him to pass an impending drug test despite his purported use of marijuana and cocaine If you misuse or take oxycodone in high doses, it can produce fatal side effects Diuretics can be detected in urine, but are rarely checked except for athletes Food and Drug Administration, each drug will show up in urine for the following amount of times People often have to take drug tests for legal or medical reasons The substance can help people who have attention deficit hyperactivity disorder and similar conditions feel calmer and less chaotic This assessment is a preliminary screen only and a more specific alternate chemical method must be used in order to obtain a confirmed analytical result at an HHS-certified laboratory

In rare instances, some labs will reject a sample for being too watery; in this case, however, they will typically give you a second chance

Posing as someone needing information on products that would ensure passing an impending drug test, we visited the store and observed a variety of masking products displayed for sale

Adderall is a prescription medication that can help people with attention-deficit hyperactivity disorder organize their thoughts The window of detection for marijuana in toxicology screenings is as follows: Urine — Up to 3 days for occasional users; more than 30 days for chronic daily users Blood — 1 to 2 days for occasional users; up to 25 days for chronic users Saliva — Up to 3 days for occasional users; up to 29 days for chronic users Hair — Up to 3 months How Long Does Cocaine Stay In Your System? Cocaine is a stimulant that elevates your mood, heart rate, and respiration Marijuana is a substance that comes from the cannabis family of plants Meth will show in urine for days However, ecstasy is often created as a pill that may be cut with other drugs Some people abuse the drug by snorting or injecting it How long does codeine stay in your system? Oxycodone is an opioid that is prescribed for various types of pain Use of diuretics in sports is prohibited Pure MDMA is usually available in crystal form Oral fluid testing results are often immediate, and hair follicles contain remnants of drug use for a long time The best way to eliminate drugs in your system is to stop taking them .

If the test is deemed a negative-dilute result, then it is very likely that an employer will demand a second test regardless of the reason Hair tests are one of the more noninvasive drug tests and the results are considered more accurate A number of adulterants cause negatives on the commonly used EMIT test, but not necessarily other tests When these test results do not fall within an acceptable range, more comprehensive testing is undertaken to assess the general validity of the specimen and confirm the presence of adulterants such as oxidants, nitrites, glutaraldehyde, chromate, and surfactant Then one of our agents, posing as a federal employee in a sensitive position who uses marijuana and cocaine and was looking for products that would allow him to pass an impending drug test, placed telephone calls to businesses we identified in our Internet search and purchased drug masking products from them While some users have reported remarkable success with them, many others have not These Web sites offer a full array of drug masking products Exercise and fasting While exercise over time helps rid your body of toxins, it is unlikely to assist you in a drug test Unfortunately, this may be difficult since urine tests may detect marijuana days after an occasional use, weeks in regular users, and weeks in multiple daily users This is a work of the U If you think you are being unjustly tested, you may have cause for legal action Sponsored Content No substance is known to produce a false positive for marijuana .

Contacts: For further information regarding this testimony, please contact Robert J In the event that a urine specimen is considered dilute at the collection site, the test participant is placed on a Dilution Log and asked to produce additional specimens every 15—20 minutes in an effort to flush the excess water out of their system The immediate-release version of the drug has a half-life of about 3 And even as illicit companies develop new products to help people cheat on drug tests, professional laboratories are developing more sophisticated means of stopping them Cocaine will show in urine for days Wait until your test results have been confirmed before indulging in compromising behavior

The window of detection for heroin in toxicology screenings is as follows: Urine — Heroin is detectable for 24 to 48 hours after the last dose, but it metabolizes into morphine, which drug tests can detect for up to three days

It will just trigger more tests

Alcohol will show in the blood for hours In no case should you give your first urine of the morning, since drug metabolites tend to build up during your sleep They are brazenly marketed on Web sites by vendors who boast of periodically reformulating their products so that they will not be detected in the drug test process Urine is generally dark yellow, while diluted urine tends to be opaque or even transparent In vivo adulteration: excess fluid ingestion causes false-negative marijuana and cocaine urine test results J Anal Toxicol In some states, such as Pennsylvania and Virginia, it is illegal to sell drug-free urine, but there is no specific prohibition on the sale of adulterants Meth will show in the blood for hours It is absorbed by your mucous membranes, and the psychoactive high kicks in within about 20 to 90 minutes We welcome your feedback Therefore, drug tests may pick it up for a longer period of time in people with higher levels of body fat For example, New Jersey, Florida, and Kentucky broadly outlaw the sale of any product designed to defraud or falsify a drug screening test When our agent described himself as a casual cocaine and marijuana user who undergoes announced drug tests, sales representatives recommended that he purchase cleansing products that are ingested orally prior to the test .

All other products were consumed with 1 gal of water While hair tests are highly sensitive to cocaine, their sensitivity to pot is not well established Heroin will show in urine for days Average detection times for marijuana metabolite appeared to be slightly shorter following ingestion of 1 gal of fluids compared with ingestion of 12 oz of water as a result of the time of testing being near the end of the cannabinoid metabolite excretion phase Let Free By the Sea Help You Today It can be difficult to quit certain drugs, especially if you are struggling with addiction or facing uncomfortable withdrawal symptoms It is more likely that an attempt to dilute a test, for example, will trigger temperature and creatinine tests and possibly additional confirmation tests San Francisco, Berkeley and some other jurisdictions forbid on-the-job drug testing except in safety-sensitive positions Government Accountability Office GAO to be accessible to users with visual impairments, as part of a longer term project to improve GAO products' accessibility Creatinine refers to a waste product produced by your muscles and is a measure of urine concentration The more serious question may be in regards to your long-term goals regarding substance use: are you planning to end substance use completely? However, it takes some time for the body to metabolize drugs and eliminate them from your system Diuretics are prescription drugs with relatively low potential for abuse among the general population .

Some brands combine hydrocodone with acetaminophen or ibuprofen to provide additional pain relief and reduce inflammation The 1-gal liquid treatments were divided into 4-qt aliquots, and 1-qt was consumed each hour for 4 h They inhibit the body's ability to reabsorb sodium in the kidney which leads to retention of water in the urine as water normally follows sodium back into the extracellular fluid

Because drug tests are highly sensitive to marijuana, random testing can promote use of other, more dangerous drugs such as cocaine and opiates, which wash out in days, or LSD, which is rarely tested

Chairman, this concludes my statement

Recommending a synthetic urine product, a representative told our investigator, "you won't have to be as careful with our product When our investigator told the sales representatives that he uses cocaine and marijuana on a daily basis and undergoes random drug testing, they recommended that he purchase either synthetic urine or adulterant products Among these questions were: How many times per week do you smoke or take other substances? Are you watched when providing the sample? Will you have at least an hour to prepare? Are you taking a Department of Transportation regulated test? After a purchaser clicks on the most appropriate responses to these questions, the site presents pictures and descriptions of recommended products that are available for purchase Hair testing is racially biased against Africans, being much more sensitive to thick, dark hair than to light, fine hair They act as carbonic anhydrase inhibitors with the major site of action in the renal distal tube As more time passes, the drug is less likely to show up in a toxicity panel According to the sales representatives, these products act as cleansers or detoxifiers Increased urine flow would reduce concentrations of banned performance enhancing substances in urine such as anabolic steroids, thus complicating their detection in doping control masking Methods of Analysis Methylation and gas chromatography-mass spectrometry GC-MS have been traditionally used for diuretic screening and confirmation in athletic doping control Second-hand smoke Second-hand smoke is often offered up as an explanation for the detection of THC during a drug test, but this, too, is a myth This text file was formatted by the U Laws Regarding the Sale of Drug Masking Products Vary: Under federal law, it may be illegal to sell drug masking products if the products are determined to be "drug paraphernalia DOI: Its effects come on quickly, depending on the method of consumption Hydrocodone works in a similar manner as heroin, working with opiate receptors to block the sensation of pain Regardless of the reason for the dilution, the positive dilute drug test is still legally considered positive for drug metabolite s in the system We conducted our investigation from August through March in accordance with quality standards for investigations set forth by the President's Council on Integrity and Efficiency It might also happen if a patient purposely consumes large amounts of fluids, including water, diuretic beverages like coffee or soda, or specific medications to compromise the outcome of a drug test It is fully eliminated from the body within 40 hours .

Diuretic testing is a part of routine doping control in sports It also provides a store locator that helps prospective customers find out whether retail stores in their local area carry these products Health and Safety Code Ann All diuretics increase the excretion of water from the body, although each class of diuretics does so in a distinct way employing different mechanisms of action There are several categories of diuretics: High ceiling loop diuretics such as furosemide, bumethanide and ethacrynic acid may cause substantial diuresis The results of a positive dilute test are equal to any positive test Side effects include dehydration, hypotension, disturbed electrolyte balance, muscle cramps and weakness This drug is usually taken orally However, despite the number of people who try, cheating on drug tests is not as easy as it might seem While all of the businesses offered products designed to defraud drug tests, the sales representatives recommended different types of masking products based on how frequently our investigator purportedly used drugs, whether he was subjected to drug tests that are announced or conducted randomly, and whether testing administrators closely monitored the collection of urine specimens

In sports where weight categories are involved diuretics are abused as weight reducing agents

The owner of the store told us that he has sold masking products for the past 11 years, and that on some days he sells up to 4 detox products

It will keep you clean for five hours The substance delivers a quick, euphoric high, which is followed by intense relaxation, contentment, and drowsiness Privacy: Urine tests intrude on intimate bodily privacy If a sample is too diluted and the results are negative, the employer may send the employee back for additional testing The average half-life for meth is about four to five hours The use of herbal products for "flushing" and "detoxification" is frequently advertised as an effective means of passing drug tests Another representative told our investigator that his company sells synthetic urine and that it is "better suited for random situations because the urine is premixed in the bag, sealed off, and irradiated so that it won't go bad Through our Internet search, we also identified and visited a retail store in the Washington, D Not all employers who use hair tests check for marijuana Another trick to foil the test is to spike the sample with an adulterant All treatments were begun approximately 22 h after smoking of a marijuana cigarette 3 .

In one case that was decided in August , the South Carolina Supreme Court upheld a conviction for violation of a statute that prohibits the possession of adulterants intended to defraud a drug test But you can still get away with it and people do get away with it Those methods of administration can produce an almost immediate high Beware that they can be dangerous for certain persons, such as diabetics or pregnant women, and can cause problems if taken over extended periods Drugs will show in saliva for different amounts of time, depending on the drug Here are a few of the more common myths about cheating on a drug test: Drink plenty of water Drinking a lot of water before a test might result in a positive dilute but will not produce a negative result Accuracy: No test is infallible If you regularly consume marijuana edibles, the drug may stay in your system longer than it would if you smoked it Independent experiments suggest that it may be water dilution, not the screen itself, that accounts for success However, the substance can show up in a drug test for the following amounts of time: Urine — Up to 4 days Blood — Up to 24 hours Saliva — 12 to 36 hours Hair — Up to 90 days Codeine, while similar to hydrocodone, has different drug detection times .