Published online 2022 Sep 12. doi: 10.10262/ Author Leslie Griver, Robert Henry

Proven Ways to Pass a Drug Test for THC in 24 Hours

Below we will describe the guaranteed ways to pass a drug test even if you have only 24 hours.

How to Pass a Urine Drug Test

You have 3 options to pass a urine drug test:

The only possible option to pass within 24 hours is flushing.

We’ll give you step-by-step instructions for this method.

How to flush THC out of your body.

The easiest and cheapest way of passing a drug test.  It involves drinking a lot of water to take the concentration of THC metabolites in your urine below the detectable levels.

What’s so good about this method is that you can use it as a same-day solution. And this means that you can smoke late into the night and still pass a drug test the following day.

The concentration of THC metabolites will reduce temporarily.

You will need to take vitamins and electrolytes to keep the color, creatinine levels, and specific gravity within the normal range.

Best for you if:

Flushing with water

You will need

  • Water: Drinking water will make you urinate frequently and flush THC out of the bladder.
  • Electrolyte powder or drink(like Gatorade): This supplement consists of sodium and magnesium. It keeps your urine’s specific gravity level in check.
  • Creatine: This helps keep creatinine levels in the urine within the normal range.
  • Vitamin B2 supplement: This gives urine its natural color.
  • Grapefruit juice: blocks the THC metabolism in the liver.
  • Chocolate bar or something sweet: to stop the excretion of THC from the fat cells.
  • Activated charcoal or wheat bran: will absorb THC in the intestines and prevent its absorption back into the blood.


3 hours before the test take:

  1. 10 grams of creatine ethyl supplement.
  2. Vitamin B.
  3. 10g of activated charcoal
  4. Eat a chocolate bar or any meal with carbohydrates(oatmeal, banana, pizza)


  1. Drink 800-1000 milliliters of water mixed with electrolyte solution every hour for three hours before the test.
  2. Take a home urine test before you go to the test center.

Important Tips for Success

Flushing with Fast Marijuana Detox Kit from Green Fleets

fast marijuana detox kit

This kit already has all the required ingredients in the right proportions to pass the drug test with flying colors.

It starts to work in just 60 minutes and gives you a 5-hour window to pass the test.

This kit is legal and not detectable by the labs.

There are no side effects, but it is advised that pregnant or breastfeeding women and people with gallbladder and kidney problems should not use the product.

There are plenty of reviews you can read from customers who used the product and had success with it.

How to use the Fast Marijuana Detox Kit to pass a drug test:

  1. Drink 20 ounces of water 2 hours before the test.
  2. Wait 20 minutes and then drink the entire bottle of QCarbo Plus with all 5 Super Boost Tabs.
  3. Refill the empty QCarbo Plus bottle with water, wait 20 more minutes, and drink again.
  4. Urinate two times and then use the included self-test kit. If results are desired, submit your test sample as soon as possible if results fail to proceed to step 5.
  5. Chew the Test Pass tablet with 32 ounces of water. Wait an additional hour, and be sure to urinate several times before going to your test.

How to Pass a Hair Drug Test

A hair follicle drug test involves a few strands of hair being cut from your head and tested for the presence of drugs.

It is a very accurate test capable of detecting the length of time you have been using a specific drug and when you stopped using it.

The hair follicle test can also determine the quantity of the drug taken. This type of drug test is not used often because it is so expensive.

The M. Method

The Macujo method involves a seven-step cleaning process. You will have to stop smoking for it to work.

But once your test results come back negative, you can spark up again.

Don’t be put off by how strange this method is. All you need to know is that it works.

The majority of people who use this method pass, so give it a go. Here is how to perform the M. method:

  1. Dampen the hair with warm water, and make sure that it is not soaking wet.
  2. Massage Heinz vinegar into the hair and scalp.
  3. Massage some Clean and Clear into your hair and scalp.
  4. Put a shower cap over your head and leave the mixture in your hair for half an hour.
  5. Wash your hair using Nexus Aloe Rid Shampoo.
  6. Rewash your hair using Tide laundry detergent.
  7. It is recommended that you repeat this process at least five times for it to work.

ZYDOT Ultra Clean Shampoo

Zydot Ultra Clean Shampoo will help you pass a hair drug test. The manufacturers are so confident about their product that they offer a full money-back guarantee if it doesn’t work.

You can use shampoo to eliminate any drug from your hair follicles. The good news is that you can use it on the morning of your drug test, and it will still do the trick.

How the Test is Conducted

  1. The test either occurs in a hospital or administering the test will send the hair to a lab for testing.
  2. The test is supervised. It is also important to mention that no matter how many times you wash your hair if you use styling products or dye your hair, it will not affect the test’s accuracy.
  3. The technician will cut between 100 and 120 strands of hair from the crown of your head. To avoid bald patches, they will collect it from different areas on the crown.
  4. You will not get away with not taking a hair test because you are bald; the hair is taken from other parts of your body.
  5. Once the hair is collected, it is wrapped in foil and then placed in an envelope and sent to the lab for testing.
  6. If the results are negative, you will get them back within 24 hours.
  7. If the results are positive, you will get them back within 72 hours.
  8. If the test comes back inconclusive, it is retaken.
  9. The test results are delivered to the organization that requested the test.

A hair follicle test is difficult to manipulate, although not impossible. Since the hair is cut directly from your head, you can’t use someone else’s hair.

You are not left alone with the sample, so you can put nothing into changing the results. Either way, there is no scientific evidence to support that this is even possible.

What you eat or drink will not change the results.

How to Pass Mouth Swab Drug Test

А mouth swab drug test involves saliva being removed from the mouth and tested for drugs. Employers typically use it because it is quick to administer.

With a mouth swab test, cannabis can be detected for up to 72 hours. Variables such as weight, height, metabolism, and the amount and frequency you smoke will influence these 72 hours.

For example, THC is eliminated from saliva in 12 hours in people who only smoke once a month.


  • Drink lots of water: This keeps you hydrated and helps the fluids in your mouth to keep moving.
  • Chew some ice: Some have found it effective to chew an ice block just before the test. The ice will cleanse your mouth and also gets rid of any lingering traces of marijuana that may still be in your saliva. Of course, this is most effective if you have not smoked for at least twenty-four hours before the test.
  • Chew some gum or mints: A similar method involves chewing gum or mints, which will dilute your saliva and increase your chances of a negative test result. In general, the idea is to keep your mouth clean by brushing your teeth and chewing gum, mints, or ice.

Use Mouthwash

Ultra Wash Toxin-Cleansing Mouthwash

The Ultra Wash Mouthwash works within minutes and remains effective for up to one hour, effectively preventing drug detection.

It comes in a very convenient and discreet little bottle, which can be slipped into your pocket or your desk drawer at work.

So if you have a bottle of Ultra Wash Mouthwash handy, you can always be prepared for any unexpected swab tests.

Hydrogen peroxide

This can be used as a cleansing mouthwash. You would need to rinse your mouth thoroughly for about three minutes with hydrogen peroxide an hour or less before the test.

After you have rinsed, do not brush your teeth or drink anything until you have had the swab test.

How the Test is Conducted

  1. A small instrument such as a cotton swab or a brush is used to wipe the cheek area’s side.
  2. It is then rubbed onto the gums and left underneath the tongue for a couple of minutes.
  3. The instrument is then inserted into a test tube containing a clear liquid. If the liquid changes color, you have failed the drug test.
  4. The test is also administered using an absorbent strip that changes color if drugs are detected in your system.


If you are looking for a cheap way to pass and are ready for some difficulties – use the flushing method.

If you need the urgent and hassle-free method – use the Fast Marijuana Detox Kit.

If you want to get clean from marijuana permanently, you need the detoxification method.

How to Increase Your Chances of Passing a Urine Drug Test

Home Remedies That Will Not Work

So here are some of the most popular urban legends that will make you fail a drugs test instead of passing it:


It is essential to mention that niacin is so toxic that hundreds of people end up in hospital after taking it in hopes of passing a drug test.

One of the most common theories is that it helps to remove THC from fat cells through vasodilation.

However, there is no scientific evidence to verify this claim.

Certo (Sure-Jell) Fruit Pectin

People believe that Certo, a type of fruit pectin, covers the bladder and stomach lining to prevent THC from being released into the urine.

It gives you a short amount of time to take a test without drugs being detected in your system.

Many users reported the method worked for them, but many people said that it didn’t.

Another problem is that there it is not known how much fiber is present in Certo. This means that there is no way to determine how much you need to take to work.

There is no scientific evidence to support the claim that Certo will help you pass a drug test.

Cranberry juice

Cranberry juice makes you pee; it contains pectin, niacin, zinc, and salicylic acid, which help pass drug tests.

May I add that this is true for salicylic acid and not the rest?

One of the problems with this theory we don’t know how much salicylic acid is in cranberry juice, and you will need to consume a specific amount.

But cranberry juice helps with natural detoxification.

Apple cider vinegar

Yes, apple cider vinegar is a natural detoxing agent; but it certainly won’t help you pass when used as a same-day solution.

For the apple cider vinegar method to work, it takes up to 8 weeks to boost fat metabolism and activate the detox process.

So, unless you will stop smoking for eight weeks, this is not a reliable method.

Azo pills

Azo products are used to treat urinary tract infections; they are available in capsule or juice form.

The active ingredient is cranberry, which is one reason people assume it can help them pass the urine drug screening.

There is no scientific evidence to support the claim that Azo products will help you pass.

One of the side effects of taking azo pills is that it turns the urine into a bright orange color.

Since this is not the natural color of urine, and the technicians are aware of this, you will fail the test of whether drugs are present in your system or not.

Baking soda

Some believe that baking soda causes the stomach to absorb drug metabolites, which results in vomiting.

This is how the toxins from the drugs are released from the body. It also alters the pH levels of the urine, which will get you an immediate fail anyway.

Meth users have reported that baking soda has helped them pass a drug test; however, meth is a base, and THC-COOH is acidic.

Since the content of urine is acidic, there are no problems when it comes to eliminating meth. This is one of the many reasons why baking soda will not help cannabis smokers.

Sweating THC out

Since our body stores THC in fat cells, people believe they can sweat THC out of their system.

The body removes the toxins through sweat; however, the sweated amount is negligible and doesn’t help marijuana detoxification.

Detox tea

Green tea is a very healthy drink, and research shows that it detoxifies the body. But it does not rid the body of THC.

The belief is that green tea burns fat cells, which stimulate the release of THC through urine.

There is no scientific evidence to support this claim, and marijuana smokers who have tried this method have reported that it does not work.

Pickle juice

One of the main ingredients in pickle juice is vinegar; the belief is that due to its acidity, pickle juice neutralizes the THC metabolites so that drug test doesn’t detect it. And that’s not true.

Although you can use vinegar as help during detoxification, it doesn’t work on the same day.;

Potable Aqua

Potable Aqua is a water purifying agent. Some people drink water containing potable aqua to clean the urine of THC.

Another method is to add potable aqua to a gallon of water and pour it into your urine sample.

There is no scientific evidence to verify these methods.

Many people have reported that they failed a drug test as a result of using this method.


Goldenseal is a medicinal herb that can help in treating inflammation, respiratory infections, and digestive disorders.

Some believe that Goldenseal prevents THC metabolites’ buildup in the urinary tract passages, eliminating them from the body and resulting in negative test results.

It is unclear whether you can pass using Goldenseal.

Eye drops

Adding a few drops of Visine to your urine sample will dilute the drug metabolites and mask THC metabolites to create a false negative.

Although there is some truth to this method, it is not advisable. By the way, it is essential to mention that you should NEVER TAKE EYE DROPS ORALLY!

If you manage to get away with using this method, there is a possibility that it might reduce the drug metabolites concentration to manipulate the test results.

The bottom line is that even if this does work, being able to put anything into your urine sample is virtually impossible.


Some believe that two of the main ingredients in Midol, Acetaminophen and Pyrilamine maleate, assist in ridding the body of THC metabolites and manipulate the drug test equipment.

There is no scientific evidence to support this claim.


The theory says that zinc attaches itself to the THC metabolites, which creates a large molecule that the kidney cannot filter, and so instead, it exits the body when you take a dump.

There is no scientific evidence to suggest that zinc attaches itself to THC metabolites, and even if this were the case, it would still be able to pass through the kidneys.

Another myth concerning zinc is that when taken, it hides the THC metabolites so that the test cannot detect them.

Most scientific studies into zinc and drug testing have concluded that zinc does not interact with the metabolites. Still, it can play a role in manipulating the actual test.

Factors That Can Affect Test Results

How often do you use drugs: The more you use drugs, either in amount or frequency, the higher the chances of a positive drug test result.

What drugs are you using: The body breaks down certain drugs faster than others, so the type of drugs you take will influence your test results.

The purity of the drug will also determine whether it is detected or not. Some drugs are cut with other products meaning they are not as strong as others.

Total body fat: No matter how little or often you use it, fat cells store THC. This means that the more fat cells you have, the more likely you will get a positive drug test result.

Health and metabolism: The metabolic process breaks down everything that enters the body. The higher your metabolism, the faster drugs are broken down and eliminated from your system.

This process also depends on gender, genetic makeup, the amount of exercise you do, and age. Evidence also suggests that certain foods can alter metabolism and affect whether drugs are detected or not.

Frequently Asked Questions

Can second-hand smoke show up on a drug test?

A study conducted by the Institute of Legal Medicine in Germany found that after placing non-marijuana and marijuana smokers in a well-ventilated space for three hours, there was THC present in blood and urine samples; however, the levels of THC after second-hand smoke were not high enough to fail a drug test.

What states require drug testing for welfare?

15 states in America require drug testing for people applying for welfare. These regulations apply specifically to those wanting Temporary Assistance for Needy Families.

The laws in each state are different: Arizona, Florida, Georgia, Michigan, Utah, Wisconsin, West Virginia, Tennessee, Oklahoma, Missouri, Mississippi, North Carolina, Alabama, Arkansas, Kansas.

What is a false positive drug test?

Although a rare occurrence, drug tests can produce inaccurate results where prescription or illegal drugs are detected in a urine or blood sample despite the individual has not taken any drugs.

How accurate are home drug tests?

Home drug tests are fairly accurate, and drugs will show up in the results if you take them. If a home test is positive, you are almost certain to get a positive result for a lab test. However, external factors can affect the accuracy of a home drug test. These include:

What happens if you fail a drug test?

The consequences of a failed drug test will depend on why the test was taken. For example, if you are on probation or parole, and abstaining from drugs is one of the conditions, a failed test could send you back to jail.

If it was for employment purposes, you might get a chance to have a second test after a certain period.

There is also the possibility that you will have to take regular drug tests to remain employed.

Does a failed drug test go on your record?

If you fail a drug test on parole or probation, the test results will be added to your criminal record.

However, if you fail a drug test at work, the results are kept confidential even when your new employer is requesting a reference from your old employer. They can not divulge such information.

How long do drug test results take?

If your drug test results are negative, expect them back within 24-48 hours. Positive results take slightly longer, and you should add three days or more to 24-48 hours. You will know if you have failed a drug test if you don’t get the results back within 48 hours.

Do they check for nicotine/steroids/HIV?

No, employers use drug tests to determine whether their employees are using illegal drugs.

Can you fail a drug test by touching or smelling weed?

Since smelling or touching weed does not involve inhaling it, you will not fail a drug test.

Can a drug test detect synthetic weed?

The answer to this question is yes and no because sometimes they show up and sometimes don’t.

The main reason for this is that over 140 different types of synthetic weed make it difficult to determine which one will be detected.

How Accurate Are Home Drug Tests Compared To Lab Tests?

The home drug tests are as accurate as the laboratory drug screens are(emit drug tests). Confirmatory GC MS drug tests are more accurate than home drug tests.

How Long Do Drug Test Results Take?

Negative results are usually received within 24 hours; however, a positive screen will require further testing that may take a few days up to one week.

Will One Hit Fail A Urine Test?

No. One hit of weed is not enough to fail a urine drug test.

How To Pass A Non-DOT Drug Test?

The methods of passing the non-DOT drug tests are the same. Dilution and Aspirin for urine test and Macujo or Jerry J method for a hair drug test

Does Niacin Work For Drug Tests?

No. We busted this myth in another post. Niacin cannot help you to pass, but it can cause damage to your liver. Do not use it.

Does Fake Urine Work?

Yes, using fake urine can help you pass a drug test, but this is not legal. Instead, use reliable and legal methods described above.

If You Pass A Home Drug Test, Will You Pass A Lab Test?

Sure. However, if you need to pass a confirmatory GC MS, using a home drug test is unreliable.

How Long For A Skinny Person To Pass A Drug Test?

It depends on the amount of marijuana consumed and the smoking frequency. If you smoke once in a while, you should be clean in a week.