There are various types of products that claim to help us pass a drug test, ranging from “detox” liquids and pills to gadgets with synthetic urine. In this article, we briefly discuss what science says about the effectiveness of these so-called “miracle cleansing products.”

Each of these products works through a specific mechanism, often involving dilution or masking. But the million-dollar question is whether they actually work.

Online, even on Amazon, you can find several types of products that supposedly help achieve a negative result on a drug test, whether saliva or urine-based. Generally speaking, these products can be divided into two main groups:

Saliva Cleaners

These are products designed to temporarily remove traces of substances from saliva that could be detected in drug tests. They are usually presented in spray form.

There is no scientific evidence supporting their effectiveness. In any case, for physiological reasons, their supposed effectiveness would last only a few seconds after application.

Saliva tests are mainly used in roadside drug checks, so these sprays are unlikely to be effective in practice, as the officer is present during the testing process. Therefore, one would have to use them preventively before driving, which would significantly reduce their supposed effectiveness.

The THC saliva test is designed to detect the presence of tetrahydrocannabinol (THC) in saliva, as well as other psychoactive substances. It works qualitatively (positive or negative) and does not measure the quantity in the body. Its use is common in roadside checks.

Urine Cleaners

These are products meant to be ingested orally and claim to speed up the elimination of drugs from the body.

This idea lacks scientific basis, since under normal conditions, the rate at which a drug is eliminated from the body depends on pharmacological parameters that cannot be influenced externally.

In this sense, the only possible strategy is the use of diuretics — medications that increase urine volume and could theoretically dilute the concentration of cannabis below detectable limits.

However, two important points must be noted:

• First, the use of diuretics (especially those with unknown origin, composition, or dosage) can have serious health consequences.

• Second, urine drug tests are always accompanied by a basic urinalysis, which would clearly show abnormalities caused by diuretic use.

Another type of “urine cleaner” includes products added directly to the sample to alter cannabis metabolites and make them undetectable. While they may be effective, they present the same drawbacks mentioned above: changes in parameters such as pH, density, or protein levels in the urine would make the attempt at tampering obvious.

The only truly reliable way to falsify a urine drug test — even under the strictest circumstances (official judicial tests include direct observation of the person urinating during sample collection) — is through the use of synthetic urine kits.

Conclusion

The conclusion is that most products claiming to help you test negative in a drug test offer little guarantee and, in many cases, can be easily detected by laboratories.

Although some products may temporarily reduce drug concentration in the body, their effectiveness is uncertain, and the likelihood of detection is high.

Nevertheless, as the saying goes, “something is better than nothing.” While their effectiveness is very limited and questionable, in some cases, they might offer a small amount of help.