It’s a big question: how to pass a drug test? An estimated 8 in 10 employers use some kind of drug screening in their employment process, meaning that drug testing is a part of the reality of employment for most Americans, even in states where cannabis has been fully legalized.

The type of drug testing used varies from employer to employer, but the most common types of testing are urinalysis and mouth swabs. Other types include blood testing and the dreaded hair test, the most difficult to pass because of its long window of detection and very low detection threshold. It’s important to know which type of test you’ll be required to take, as that will determine how you go about ensuring you pass. Here, we’ll discuss methods you can use to cleanse yourself of THC to pass each type of drug test.

Abstinence, The Obvious Answer

Of course, abstinence from THC is the only surefire way to know that it won’t end up in your system to yield a positive result on a drug screen. THC will be out of your saliva and blood in under 24 hours, making these the easiest tests to pass at short notice. However, urinalysis and hair testing can detect drug use for much longer, potentially months back. They therefore require much longer periods of abstinence, about 100 days for hair testing and over two months for heavy cannabis consumers.

If you don’t have that long to clean out your system, don’t worry. You still have plenty of options to test clean on short notice, depending on the type of test you’ll be taking. Whatever test you’re trying to detox for, it’s important to abstain from THC during your cleanse, or else you’ll just be recontaminating your body and putting yourself at risk for a positive result.

How to Pass a Mouth Swab Drug Test

Mouth swabs are one of the most common types of drug testing, widely used because they’re cheap to purchase and non-invasive to administer. Mouth swabs only detect THC, not its main metabolite THC-COOH (which can stick around far longer than THC itself). While THC coats the inside of your mouth when you smoke or vape, it doesn’t stick around very long: less than 48 hours. You can speed things along by taking a few extra measures.

First, eat something high in fat. THC is lipid-soluble, meaning it bonds to fat molecules. Eating a fatty food can help draw lingering THC out of your mouth more quickly. It’s also a good idea to brush vigorously and use an alcohol-based mouthwash to draw out additional THC molecules, though alcohol should be avoided in the hours immediately before the mouth swab is to take place. Increase your fluid intake as well, and if you’re really pressed for time, use Toxin Rid Rescue Wash Mouthwash a few minutes before your test to ensure a deep clean in the nick of time.

How to Pass a Blood Drug Test

Blood tests are very expensive to administer and test, and they only have a window of detection of a few hours. For this reason, they aren’t often used for employment, but may be used for liability purposes if you were involved in an accident on the job.

While blood tests aren’t effective for very long, there isn’t a reliable and safe way to beat one while the THC is coursing through your veins. However, if you have at least 24 hours to plan and clear out your system, a Toxin Rid Detox Program can help you get clean in time for your test. Available in a variety of strengths and program durations, there’s an option suitable for every level of cannabis usage.

How to Pass a Urine Drug Test

Urinalysis is very common, as it’s cheap to administer and has a much longer window of detection, especially for THC. Urine screens can detect THC and its main metabolite, THC-COOH, for months after last consumption in heavy cannabis consumers because these compounds hang out in the body’s fatty tissue instead of being flushed out by the kidneys.

So, how do you pass a urine test? Our favorite method is to use a Powdered Urine Kit.  It’s simple, foolproof, and guaranteed to work every time (this is the stuff they use to calibrate urinalyses, so it will absolutely pass the test). Simply mix water with the powder the day of your test, then use the included heater to warm the specimen up to body temperature (90-100 degrees). We love this method and it’s suitable for most positions—that said, it won’t do for a supervised urinalysis.

If you’re going to be watched while you pee, you’ll need to temporarily cleanse your urine using Mega Clean Cleansing Drink. While it won’t thoroughly cleanse your system of THC, it will allow you a window of time during which you will test clean. To use Mega Clean, drink the entire bottle about three hours before your test, then fill the bottle with water and drink that as well.

You’ll need to make sure that the specimen you provide isn’t your first pee after taking Mega Clean—go as often as you need to and continue to drink water in the hours leading up to your test. Mega Clean is effective for five hours after ingestion, with peak effectiveness at three hours. So, while you’re best off timing it out to test at the three hour mark, you’ve got some wiggle room if the test gets delayed for some reason.

How to Pass a Hair Drug Test

Ah, yes, the dreaded hair test. Notoriously hard to beat for its extremely long window of detection and its ultra-low detection threshold, the hair test is usually reserved for high-security positions but is growing in popularity. It’s more challenging to beat (and your hair won’t like it one bit), but it can be done!

First, you’ll need to get a cleansing shampoo like the Old Style Aloe Toxin Rid Shampoo or the Zydot Ultra Clean Shampoo. While both these products can be used separately, we find they’re most effective when used in conjunction with one another. Our preferred cleansing regimen is to wash with the Toxin Rid shampoo 10-15 times before the day of the test, supplementing with the Zydot every 3-5 washes. This is because of Zydot’s three-step cleansing system, which helps deep clean before adding some shine and strength back into the hair. The day of your test, wash once more with the Zydot for a final deep cleanse and conditioning benefits, then follow up with a good conditioner to help restore some of your hair’s health.

There are also home remedies you can use to supplement this routine, though we wouldn’t rely on them alone. You can soak your hair in white vinegar for 15 minutes before shampooing, then treat it with a salicylic acid acne treatment (yes, the kind you would usually use on pimples). Then, if you’re feeling really bold, wash your hair with some liquid detergent—it will seriously dry out your hair, but it will strip out all the oils and any THC molecules attached to them.

While it’s not for everyone, you can also bleach your hair, then dye it using a box dye with peroxide developer (avoid direct dyes, which lack the chemical cleaning effects of other dyes). In order for this to be effective on its own, however, you would need to do it several times, which could really fry your hair. We like our cleansing shampoo routine because it eliminates the need for these harsh chemical interventions that can severely damage the hair.

A Quick Note About CBD & Drug Testing

Much of the data we have about CBD is anecdotal, and its potential impact on drug testing is no exception.  There are very few peer-reviewed studies on the subject, and the ones available paint a rather murky picture:  avoiding full-spectrum products containing traces of THC can reduce your risk of a false positive, but that may not eliminate the risk entirely.  A single study (as yet unconfirmed) suggests that even isolate-based products may not be completely risk-free under certain circumstances.

If you are concerned about passing a drug test, you’ll need to consider this potential risk when deciding whether CBD is right for you. To learn more about the science of CBD and drug testing, check out our article for a more thorough discussion of how to minimize your risk of a false positive.


No matter what test you’re being subjected to or the window of time you have to take it, there’s an option available to help you test clean. Of course, having advance notice can be a lifesaver, but you can successfully pass most drug tests in a pinch. If drug testing is a part of your reality, consider keeping a stash of powdered urine kits or Mega Clean Cleansing Drinks to make sure you’re always prepared, even at a moment’s notice.

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