Simple Guide on How to Pass a Urine Drug Test With Baking Soda

Baking soda and vinegar have two things in common. First, it’s very likely that you have them in your kitchen.

Second, both of them are thought to help in cheating urinary drug tests. I’ve already written about the use of vinegar in beating marijuana urine tests.

So, today’s article will be about baking soda; how it is used to game the test and why it may or it may not work.

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How to Pass a Urine Drug Test With Baking Soda: Step-by-Step Instructions

The internet community has several ways of doing this. While they are thought to lead to the same results, they differ slightly regarding the amount of soda ingested.

The method that I have outlined below is the most common

how to pass a urine drug test with baking soda - infographics

Why People Think it Will Help

According to the sources that propagate this theory, when baking soda is ingested, it absorbs toxins (including metabolites of the weed, methamphetamine etc) from the blood system into the stomach.

It then induces an urge to vomit where the user vomits most of the toxins.

Drinking more water after that helps in stopping further dehydration and flushing out all the remaining toxins through the urinary system.

Does it work?

Short answer: No.

Long answer: The belief that baking soda does help with passing marijuana drug tests is just gaining momentum.

This method is most common with meth users, and it has been found to work for this purpose.

The ability to fool a meth urine drug test with baking soda stems from 2 facts.

First, when ingested, sodium bicarbonate – the active ingredient in soda- is known to increase the pH of urine thereby making it more alkaline.

Second, methamphetamine is easily excreted into acidic urine than in alkaline urine, and this means that there will be fewer metabolites in the urine at the time of the test thereby increasing the probability of passing.

urine pH effect on methamphetamine excretion

But this only happens with methamphetamine. And this is because meth is a base as opposed to THC-COOH which is acidic.

This means that since urine is slightly acidic, renal elimination of meth is easy and flawless.

But this changes drastically when the urine is alkalinized in that almost zero meth will be excreted via this route.

This is what makes baking soda a viable option for beating a meth urine drug test.

But are THC and THC metabolites affected by this change in pH in the same manner?

No, they aren’t. Although there isn’t a lot of scientific studies around this topic yet, basic knowledge of how THC and its metabolites behave in different pH levels is enough to tell whether changes in pH levels of urine will affect the concentration of these metabolites in urine or not.

Understanding pH and its effect on solubility and movement of ions across membranes

pH refers to the concentration of hydrogen ions in a given solution of 1 to 14 where 7 denotes a neutral solution.

The lower values 1-6 show that the solution is acidic (the lower the number, the higher the acidity) while the higher values mean that the solution is more alkaline.

The pH of a solution determines the ionization state of the molecules in it, and they can be positively or negatively charged.

For instance, a base molecule can be neutral at higher pH levels and +vely charged at lower pH levels.

On the other hand, an acidic molecule can be neutral at lower pH levels and – very charged at higher pH levels.

The pKa level of a given molecule refers to a measure of acid strength. Smaller pKa values indicate that the molecule is more acidic.

The converse is true. The pKa level also shows a pH state where 50% of the molecules are ions and the rest are unionized.

A change in the pH level affects the pKa level of the molecules thereby interfering with their solubility of and ability to go across cell membranes.

Urine pH works on this principle when eliminating toxins including drugs and drug metabolites through a process known as ion trapping.

Let’s dig deeper here.

Ion Trapping and its role in drug excretion in urine

Just as this name suggests, ion trapping is an interesting process that enables the urine to trap the ions of target toxins for excretion.

The process of ion trapping takes place in the renal tubules.


It’s in these tubules that the plasma that has just been filtered by the kidneys passes through as it is converted into urine.

As the plasma moves along the tubules, some of its molecules may be reabsorbed back into the blood by penetrating through the cell membrane that makes the walls of these tubules.

However, keep in mind that whether or not the molecules will be reabsorbed depends on whether they are ionized or non-ionized.

Most non-ionized molecules easily diffuse across the membranes credit to their high lipid solubility.

Ionized molecules, on the other hand, cannot diffuse back across the cellular membranes and are, therefore, successfully trapped and ready for excretion as urine.

Worth noting, only toxins from weak acids and bases are amenable for ion trapping.

Ion Trapping does not affect the excretion of THC and its metabolites

It’s true that ingesting baking soda does increase the pH level of urine.

The major limitation when dealing with THC and its metabolites, however, is that the increase in urine pH has a very small effect on the ionization state of these toxins.

For instance, assuming that you have successfully upped your urine’s pH level from 6 to 8, the ionization of THC (with a pKa of 10.6) will increase from 0% to 0.3%.

This increase isn’t enough to have a significant ion trapping effect.

THC-COOH (11-hydroxy-THC) the main active metabolite of tetrahydrocannabinol has a pKa of 9.3.

The predicted change in urine pH will change its ionization from 0.1% to 4.8%.

Although this is still not high enough to warrant significant ion trapping effect, it has been found to increase the excretion of this metabolite by around 10% in some people especially those with lower hepatic clearance.

THC-COO-glucuronide with a pKa of around 3.2 is quite interesting in that its ionization moves from 99.8% to 100%.

In theory, this change seems so promising and means that it can be easily reabsorbed back into the blood thereby allowing you a window to collect some clean urine.

Unfortunately, this glucuronide molecule is relatively large.

Its molecular weight of 565g/mol means that it’s way too large to be taken back through the membranes.

Bottom line

Baking soda might help in passing meth urine drug tests, but it won’t offer a lot of help in marijuana tests.

The slightly higher ionization change of the THC-COOH metabolite might boost the detoxification process especially if you have a slow hepatic clearance.

However, it won’t offer much help to most people.

Even if you are among the few who might benefit from it, the rate of detoxification will still be prolonged.

Importantly, the presence of THC-COO-glucuronide in the urine (which is actually what labs look for), means that you’ll need to look for an alternative method in case you are scheduled for a test within a short notice.

The fact that you are altering your urine pH is another big reason not to rely on this method.

This is one of the first urine components that virtually all labs look for immediately after handing over the specimen.

They will automatically disqualify your specimen without further testing for specific drugs in case your urine’s pH is outside the normal range.

So, which is the most reliable method of cheating a test?

If you are a frequent visitor and reader of the articles on this site, you must have realized that dilution is my most recommendable way of cheating urinary drug tests.

The key benefits of this method are its high success rate and minimal side effects.

Of course, similar to any other method, dilution can also attract unwanted attention from the lab experts if it’s not done in the right way.

The most proven and best way to pass a drug test on short notice is to use proven detoxification products:

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  1. C herie says:

    It does work I’ve done it myself 100% guarantee it works and I didn’t feel sick just had the runs for the day lol

    • Kerina says:

      Lol. So did you take the test the next day? I have a test tomorrow and was wondering?

      • Anonymous says:

        I’d like to know as well.

      • unknown says:

        Has to be 2 hours after you drink the baking soda. And pee 2x first the 3rd pee will be clean and only the 3rd pee! after that they will be dirty again. It only neutralizes your pee(masks it)

        • Smoke530 reefer says:

          If your a heavy smoker like me, sorry to tell u this but…nothing will work. Its all BS. I’m from nor cali. I grow nothing but that good kush. But if you a VERY LIGHT SMOKER, it might work but for heavy smokers like me, nothing will work.

      • Noone says:

        I’ve done this for about 20 u.a’s it’s 1 tablespoon baking soda for every 50 pounds of body weight. You start 3 hours before you have to do the u.a. test. You have to get down the amount of baking soda for your amount of body weight within the first 45 minutes along with (3) 16 oz bottles of water. You can not mix the baking soda and water together. You have to take the baking soda by spoonfuls following with drinks of water. Do not go pee yet until you feel like you have to pee a full pee. Not just a little bit. Then when you have finished the amount of baking soda and the first 3 bottles of water go empty your bladder. Then within the next hour drink 3 more bottles of water. Emptying your bladder one more time. So a total of 2 times. The 3rd time you have to go pee is going to be your clean pee. So save that one for your u.a. test. Even if inbetween all this timeframe you have to have a bowel movement do not pee. Very important. I usually would buy a home u.a.test and on my 3rd pee I would just go pee enough into the cup from the home u.a. test kit. Saving the rest of your 3rd pee. Cause it is going to be your clean pee. I always tested it just to be safe. So when I took the u.a. I was confident that I was is full proof.

    • Ct says:

      I’d like to know as well if you took it the next day. I haven’t been smoking for a week now and I’m losing my mind. Lol. I’ve been detoxing and taking baking soda. I think i should be good for next week Monday to take the test.

    • Anonymous says:

      How long do you have to wait and how many times do you have to pee before you are ok?

  2. K says:

    From what I’ve read, it has to be done the day of the test. I wouldn’t do it the day before and hope that it works on a test the following day. This article actually says it really only gives you 2 to 6 hours before you would test positive again…probably gonna be trying this method out myself today…nervous…eeekkk

    • Anonymous says:

      Did it work? I have a test at 3 but I have to sit through a two hour class then take my drug test. My class starts at 1:30 my test is at 3 what time should I drink it?

  3. bob says:

    Works for dope did lines before the ua even passed. How about thc?

  4. Morgan says:

    How much water should I use in the “glass of water” it calls for

    • John says:

      I read, one parole was mixing 32oz water and three tablespoons baking soda. His claim was that it empties your bowls completely.
      Which helps clean many of the chemical traces out.
      He mentioned he had failed three times and spent extra time behind bars until he started using the baking soda!
      Those guys are desperate not to go back and probably due a lot of trial and error, and many tests.
      I would consider trying it.

  5. jp81 says:

    I just ivd about half a qtr gram. Haven’t used in months though first time. Banged it, now I have 1 hr to ua. Im in a halfway house got a random just my luck. Did the baking soda method. Will I be clean in an hour????? Help?!!!!!!

  6. Anonymous says:

    Does it have to be water or can it be Gatorade

  7. Tree says:

    Did u pass jp81?

  8. Anonymous says:

    Does the baking soda method really work?

  9. John snow says:

    I was in the halfway house, half our pod was doing Meth, the whole facility got dropped, due to the baking soda not one of them dropped dirty. I’d just like to know if this will help with smoking bud and doing coke. Im gonna try it and go piss later today. I’ll be back at the beginning of the month after I see my po, to let you know what the outcome is. If you don’t hear back by January 15th don’t try this method for coke or weed

  10. Dt333 says:

    What if you throw it up like 10 mins after? What do you do? Repeat the process until you don’t puke it all up?

  11. Rubadub says:

    If it makes you nauseated just suck on mints after u drink the baking soda… Any kind works. Mints and peppermint particularily are natural anti-emetics (anti nausea) thats why restaurants give them to you after you eat so you wont get indigestion from their food! Thats all alka seltzer is.. Soda and mint essentially

  12. Ms v says:

    I have a test Feb. 13 2018 to see my p.o. and I have been drinking gallons of water and cranberry juice and I added 1 tsp of baking soda to a gallon of water, what are my chances of passing and am I doing it right.

  13. Anonymous says:

    I have a test this month and I’m a everyday smoker, will the baking soda work for me??

    • Kylie Wilson says:

      As it is said in our post – there’s no scientific evidence that baking soda is effective to pass drug test. As you have a month – you have a good chance to pass without any remedies. Just stop smoking, eath healthy and drink more water – this will help to burn fat cells, that store THC. However it also depends on your weight and metabolism speed. Check also this guide:

  14. Eric w says:

    Hey I have to report today for PO. I’m a bigger dude, can some tell me the directions on how I should mix the baking soda with water? Please and thnks

  15. Mike G says:

    This works if you start at least two hours before. 3 tablespoons in 3 cups of water. In an hour you will have diarrhea for about an hour. Drink plenty of water. About an hour before drink tea because it will add color to your urine. This works because it changes the oh pH balence in your urine. I’ve done a bump and then did this and passed. IT DOES NOT LAST ALL DAY. YOU ONLY HAVE A FEW HOURS. 5 HOURS AFTER YOU WILL TEST POSITIVE. This works for pot or meth

    • Anonymous says:

      I have graduated drug court and i kept getting dilutes and what worked for me was eating 3 spoons of peanut butter on the way to test and and put color to my urine

  16. Daygo says:

    Man i did this once for meth about a month ago it worked im on federal probation they have the most accurate testing labs from the prison system to an employer.
    However the second time I kinda fumbled the process peeing on the 4th instead of the ‘3rd time … And at 3hrs instead of 2 & 1/2 imma tell you this it’s not a full proof plan but it could work I figure most are like me and figure life ain’t s**t without risk so today I’m testing and I’ll see what happens

    3 tablespoons
    8-16oz of water shaking till dissolved then drunk fast and whole wait approximately 2hrs (only pee 2 the 3rd is your bread winner )

    Then let’s see what happens next

  17. Anonymous says:

    I took a quarter of a Xanax bar last night and have to test this afternoon! Going to try the 4 tablespoons with 16oz of water , keep drinking water for the few hours before the test and use the third piss for the cup! Am I good or am I fucked?

  18. Anonymous says:

    Does this remedy work for opiates, or heroin??

  19. Dran says:

    Going to try this Friday at noon I will let you know if good results if no response by 5pm Friday no good of a theory

  20. Parollee says:

    I used meth on Sunday have to piss on thursday, will doing baking soda Every day help. I have also been taking midol. 4 days with water, cranberry juice and midol? Baking soda is my backup plan since I got 48hrs now. I hope it works

  21. Anonymous says:

    But today is my first time trying it baking soda test and I took 3 tablespoons and a half a glass of chocolate milk and mix it all together and chugged it and I’m drinking a gallon of water before I go so I will also let you know the results of my test after 1 today if it really works right and I am dirty for meth and marijuana so all you bud smokers out there we might have a remedy for the Bud 2 some people say it works so I’ll let you know

  22. Anon says:

    It dont work for weed when i was on parole i got sent to rehab for weed

  23. So screwed says:

    I just smoked a bowl of Dope and got called for a random ua with my! Will the baking soda and water mixture work?

    • Bjprobation says:

      Diid it work for you and what exactly did you. Do as your procedure with the soda, I have to call in every day and be on stand by for ua

  24. Outlawcowboy67 says:

    Hi! It’s April 13 2018. I have a drug test at like 9am today I’m going to try this. I’ll let everyone know if it works.

    I’m going to drink 2shot glasses of baking soda and 2 32 oz of water 2 hours before. Wish me luck!

  25. Dorian Burrows says:

    My probation drug tests me two times a week. I just started using baking soda and water. The first time I did 4 table spoons and water. Bad idea. I shitted like crazy with diarrhea. Only do one table spoon and 3 or more water bottles before the test

  26. Anonymous says:

    Does baking soda an water really work an does it work that fast….? Need straight. Up for real steps to take an exactly how much to use plz…

    • Kylie Wilson says:

      It doesn’t work. Those, who claim that it works just dilute their urine by drinking lots of water along with baking soda. Baking soda is not neccessary for diluting urine.

  27. Chacha says:

    Actually the side effect of diarrhea from drinking the baking soda is helpful for passing the test. Remnants of drugs such as amphetamines, and opioids are also stored in your shit. Pardon my French, but the more you shit out the better. Also the peeing is crucial, drink as much water as you can possibly handle without harming yourself. Niacin, and/or Vitamin C, as well as Vitamin B help a lot as well with pushing the substances out faster, and Vitamin C also helps with color if that’s a factor. Another way to speed up the process is sweating. If you can stand it, poke two arm sized wholes on each side of a large trash bag, put it on like a shirt with an actual shirt over it, and a hoodie or sweatshirt over that. Wear it around the house while you do chores for as long as you can stand it. Follow it up with super hot showers. Getting your heart rate up for as long as you can also helps. You can even just stand in front of your television, and zone out while doing a side step movement for a whole movie, also followed by hot shower. I like to hoolahoop while watching a movie, you can get one for like five bucks or less at any drug store or Walmart, (plus it’s just a great way for getting a toned mid drift). Watching a movie or TV helps with keeping your mind off the fact that your exorcising, and helps you go for longer periods of time. That’s why they have TV’s at gyms. Do this every day before you test, and always followed by a hot shower. Taking a diarrhetic helps with maximizing your peeing potential as well. Also Pedialyte is great for that to. Most of these suggestions work best the more time you have, but every little thing helps! Good luck!

  28. Pizzle says:

    Its 4:22am, and i sign up for drug court today. not sure if they will be drugtesting me or not. But i will be trying this baking soda method just as precaution. Hoping it works. 134 pounds 5’7. Hope i dont over due it lol. Will post and let everyone know how things go and wether or not i was drug tested.

  29. CP says:

    Science actually does back it. Amphetamine is actually a weak base so when you drink Sodium Bicarbonate(aka baking soda) in high doses, it rasies your urine ph to a base level of 7.5-9. That makes it so the Amphetamine metabolites stay in their charged form and therefore get reabsorbed into the blood via renal reabsorption. By doing so the amount of metabolites that do make it out are below cutoff levels of 500ng/ml. Plus table salt has been known to interfere with preliminary screenings and baking soda is virtually salt on steroids. Just be ready to put in some work on the toilet. Diarrhea is almost certain.

  30. Anonymous says:

    Your methodology is dead wrong. You shouldn’t vomit on baking soda. It has nothing to do with toxins.

    The theory behind the science is that baking soda can raise the pH of your body, holding back the metabolites in meth below the positive testing threshold.

    The science is sound. The results are anectdotal though. It only works for a certain small percentage of the population.

  31. The Occultist says:

    I have been on probation or parole my entire adult life. I’ve always had problems passing ua’s. Addiction is a motherfucker. I have used baking soda to mask meth from my urinalysis multiple times. It always works for me. I’m 200lbs and I use 3 tablespoons in a cup of water. I get the runs, pee twice, and go test. I sip water the whole time. Only works for meth. You have about a 3 hour window. Every time I do it, I have the runs when I test. I don’t wait till it’s gone. As a matter of fact, I’m testing today, and I’ve just finished my soda and water. Waiting for the runs to start. Good luck tweakers!

  32. twisted says:

    what if i am drinking coffee between the water?
    is that going to affect the results?

  33. name13ss says:

    I have puked once and peed three times and drank (5) 16oz bottles of water. after drinking the 3 tblsp of baking soda with apple cider vinegar lemon juice honey and fiber powder with water.
    and I have to see my po in a half hour. now i’m bloated and feel like i’m going to pop. is that normal?

  34. Steddy1979 says:

    OMG! It really is very frustrating reading so many comments from so many people that have NO CLUE what they r talking about.


    SO all of u smartass college grads who think u know what ur talking about. I call B.S.
    I have been on probation for 2 yrs and call in daily. I usually test at least twice a week and I smoke probably about 1 /12 grams of meth damn near regularly/daily.
    (Dont judge me). And I have NEVER not once gotn a dirty UA. Stop judging people for their faults. U havd no idea what has made them need to self medicate. Just bcuz someone turns to drugs doesn’t mean they r a bad person. And 9 times out of 10 they are not hurting anyone but themselves. Let them b. Sorry for ranting. But it really does work. I promise. ✌

  35. Addictionrealist says:

    This country makes me sick with the way we r treated just because we have an disease. I can’t just stop I am married go to school and the legal system has had me under their thumb my whole fucking life I’m 48 been in feds 10 years missed watching my 3 daughters grow up without a mom or dad . The damage is irreparable still on paper trying to pass a fucking ua


    So I haven’t done meth in 3 months.

    Sunday I smoked around 11 pm. Three hits of meth on a pipe drank a shot of liquor.

    Ate too much and peed a lot since smoking I got a UA today(Tuesday ) before 11 am will I be clean right now Tuesday? At 2:03, I did the baking soda trick. Before I go in, then I’ll do it at 6 drinking the baking soda with water. Will I be clean?

  37. J2the9thpwr says:

    Although this method does work it is worth mentioning that some of the equipment drug testing places use detect more than just the drug. If the sample for instance is diluted, then the test is determined to be dilute which is basically a failure. The reason for this is the amount of Creatine in the system is off due to the excessive amount of water being taken in. Simply taking a dose of a Creatine supplement, found in most health food stores. This will level out the creatine in your urine and you will not test dilute. Again, as outlined in the article here, the baking soda method only works for Meth. Oh and for all of you out there who might have tried this and just cannot stomach the after effects. Try drinking a Mountain Dew soft drink right after taking your test. I’d lay the scientific explanation out for you, but simply it works to neutralize the effects…..somewhat.

  38. Hornboys says:

    This method does work I have used it multiple times I have threw it up and still passed. It was in my system for 30 min b4 I did so tho… 7 table spoon fulls I eat them all at 1 time then a half gallon of water I am 163 lbs it never failed me I do 4 test a week

  39. rob says:

    i had half a point on thursday (snorted) P test for new job on monday im quite positive that smoking it stays in your system longer is that true im 85kgs do i need to use 4 tablespoons of baking soda or can i use less i going to try this to make sure i pass.any drugs have ruined my looks my career im 50yrs old and got nothing only a love for meth so do urself a favor and everyone around try and give it up cause it will catch up on u peace