A “Dilute” Specimen: Is It a Reliable Way To Pass a Drug Test?

There are claims that a diluted urine sample can help an individual pass a drug screening test. That is why those who often need to undergo the said laboratory examination try to find ways on how to dilute urine for drug tests. Many have tried several dilution techniques, which we will discuss together with negative vs. positive diluted specimens and effective ways to beat a urine drug test.

What Is a Diluted Urine Sample?

A diluted urine sample is a urine specimen with a higher amount of water than the average. It usually appears clear with a straw color.

People with certain health issues, such as nephrogenic diabetes insipidus, usually produce dilute urine. However, there are also other reasons urine becomes less concentrated. Usually, those who want to pass drugs-of-abuse screening tests do this intentionally.

Dilution Techniques for Drug Tests

The four most common ways urine samples for drug screening tests become diluted are:

1. Excessive Fluid Intake

Normal urine contains a small amount of various metabolic by-products and approximately 95% water. Once you increase your fluid intake, the levels of solutes further decrease while increasing the amount of solvent.

Water is the most common diluting agent or solvent, so people would drink plenty of water a day before the test. There is no accurate and precise value as to how much water to dilute urine for drug tests is needed. That’s because the rate at which the body clears substances will depend from one person to another.

Apart from water, other fluids such as tea, juice, and coffee can also decrease urine concentration.


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2. Use of Diuretics

Diuretics are products that allow your body to excrete a higher amount of water than you would normally do, resulting in less concentrated urine. Most of these are medications prescribed for people with hypertension, kidney problems, diabetes, and PCOS.

There are also commonly consumed beverages and food that have physiological diuretic effects, including but not limited to:

  • Bell pepper
  • Berries
  • Celery
  • Coffee
  • Grapes
  • Tea
  • Watermelon

3. Dilution Tablets

Dilution tablets are among the most popular products used by amphetamine users who try to trick or fake urine drug tests. They take the tablet orally, a day before their scheduled drug test to help lower the amount of the drug in the body; thereby, producing less concentrated pee.

What Is Considered “Dilution” in Urine Drug Testing? Positive vs. Negative Diluted Specimen

Some people who’ve diluted their pee in the past have passed screening procedures for abused drugs. That’s because some of them learned how to add color to urine for drug tests.

They consumed vitamins, specifically vitamin B, a day before the test to ensure their urine’s color is yellow and transparency isn’t too clear. This way, the tester won’t reject the specimen and suspect any intentional dilution.

Nowadays, though, thanks to the continuous improvement in any methods of and protocols for screening, experts can determine whether or not a submitted diluted pee is acceptable or not.

Validity Checks for Diluted Pee for Drug Screens

We already know the standard diluted meaning and dilute urine appears clear, but not every clear pee submitted for drug screen indicates the person diluted it intentionally. Thus, screening labs perform validity checks, namely:

1. Creatinine Levels

Creatinine, a breakdown product of amino acid metabolism, is one of the top organic compounds found in normal urine. Its normal concentration ranges from 20 mg/dl to 400mg/dl. If the submitted urine has a creatinine level lower than 20 mg/dl, testers mark it as dilute.

2. Specific Gravity

The specific gravity is a common test included in a routine urinalysis that determines the urine’s concentration. The normal range is usually between 1.002 to 1.020. Anything below 1.002 indicates that the urine is too diluted.

These two lab examinations for urine will help the tester classify it as either a negative or positive dilute.

Negative vs. Positive Dilute or Dilution

At times, a drug screening test comes with a negative or positive dilute result. Understanding how these two are different is important not only for employers or those requiring the tests but also for those who took the test.

Negative Dilute

A negative dilute result means the sample tested negative for the drugs of concern, but there is too much water in the sample submitted. As such, it’s not really indicative if the person is truly negative for drug use. With these results, the table below is a guide on what needs to be done.

Creatinine Level What To Do Who Orders It
2 mg/dl to 5 mg/dl Repeat Collection and testing Testing Facility/Officer
Above 5 mg/dl to 20 mg/dl Accept result as negative or retest immediately with an escort to ensure the person doesn’t drink a lot of water Company/Employer or Requesting Party

An initial negative dilute result doesn’t usually violate any diluted urine drug test probation and not a reason for someone’s termination. However, the company’s policy will dictate whether or not a job applicant with such a result can continue his or her application. It’s also the basis as to what action needs to be taken next regarding the specific employee.

Positive Dilute

On the contrary, a positive dilute result means that the pee is positive for the drug tested even though it has a low specific gravity and creatinine level. This indicates that the dilution attempt to flush out the metabolite was unsuccessful. Unlike the negative dilute result, a positive dilute result is always positive.

How To Beat a Drug Test According To Experts and Medical Scientists

Lots of companies conduct drug screening randomly to ensure they maintain a drug-free working environment. Most of these tests can detect the presence of a drug substance in your system that you smoked or consumed a week before. Hence, how to pass a urine drug test in 24 hours naturally if you’re a user is like finding a needle in the haystack.


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The Best Way To Pass a Drug Test on Short Notice

It goes without saying that the best way to pass a drug test is to refrain from using marijuana, cocaine, and other substances of abuse.

Possible Alternatives

Some tricks can beat simple immunoassays for drugs, but we don’t suggest them since they also come with dangers.


Aspirin is a popular medication that helps manage minor aches, fever, and inflammation. It’s also commonly prescribed to individuals at high risk of developing clots that can lead to stroke or heart attacks. People allergic to the med and those with bleeding tendencies, GIT issues, and liver ailments shouldn’t take aspirin.

With that in mind, a published study showed that the presence of aspirin metabolites in the sample could produce a false-negative result. Do note, though, that this is only true for the lab procedure known as EMIT assay.

The recommended ways to take aspirin for this purpose are as follows:

  1. Four to six hours before your scheduled drug test, take two aspirin tablets with at least 30 minutes interval per tablet.
  2. Two hours before the test, take another two aspirin tablets with at least 30 minutes interval per tablet.
  3. Drink safe, but large quantities of water for you to urinate a few times before you submit a sample.

Creatine Supplements

Drinking lots of water to flush out the drug metabolites and dilute the pee used to be one of the ways of passing a drug test naturally. As mentioned, most, if not all, drug screening facilities now check for creatinine levels when the urine submitted appears diluted.

Taking creatine supplements might increase the creatinine to an acceptable level since creatinine is a creatine metabolism product. The safety of consuming creatine supplements must also be considered, though, especially if you have underlying conditions.

Reliability of Diluted Urine in Passing a Drug Screen: The Conclusion

The drug test dilution success in beating assays in the past led to the improvement in screening for drugs in urine. From accompanying a person while collecting a sample to performing validity checks, common dilution techniques no longer work.

Therefore, diluted urine isn’t a reliable way to pass a drug screening test. Plus, getting a negative dilution result can be a hassle since you might need to repeat the test, and worst, it can put your integrity on the line. Lastly, you might put your health at risk if you plan to beat the test by taking medications or supplements.

So, stay as drug-free as possible!