How Long Does Meth Stay In Your System?

What Affects How Long Meth Stay In Your System? How The Body Breaks Down Meth?

What’s The Difference Between Meth & Crystal Meth?

Crystal meth is a very pure form of meth, which forms in a crystalline structure. It’s traded this way to prove that it is pure. However, it’s the same substance you’d get in a powder, putty, or tablet. The effects are the same, although more robust. Therefore, crystal meth can stay in the system longer than a weaker form of the same drug. The question is, how long does meth stay in your system? One of the main reasons to be aware of how long meth remains in the system is the risk of overdose. Read this article to learn more.

Meth is a highly addictive stimulant that excites the brain. It typically comes in the form of a powder, but it can be snorted, smoked, injected, and even swallowed in pill form. Meth is frequently abused and sold on the street under many different nicknames. Because of its highly addictive quality, meth users struggle to give up on their own and must seek professional meth addiction help to finally stop for good. Continued abuse can lead to serious health problems as well as a drastic decline in physical condition.

According to the Center for Disease Control and Prevention, from 2015 to 2018, an estimated 1.6 million U.S. adults aged 18 years and above, on average, reported past-year meth use; 52.9% had a meth addiction, and 22.3% reported injecting meth within the past year. In addition, co-occurring substance use and mental illness were common among those who used meth within the past year.

How Long Does Meth Stay in Your System?

Each individual is different; therefore, there is no set time for how long meth stays in your system. Various factors contribute to and can affect this number. Generally, the “high” that users get from meth starts relatively fast. The metabolism of meth is faster in some people than in others. The effects of the drug typically last from six to twelve hours. However, traces of meth in an individual’s system can be found even months later. The amount of time that the drug remains in the body can change depending on the average dose of meth taken, the person’s physical characteristics, and the frequency of use.

How Long Does Meth Stay In Your System?
Since many people combine meth with other substances, that can affect how long meth stays in your system as well as how you feel when you take the drug. For example, people often drink alcohol when they take meth to reduce the jittery effects that the drug has on their bodies.

How the Body Breaks Down Meth?

The body quickly absorbs meth whether it’s injected, smoked, snorted, or taken orally. The drug is naturally broken down by the liver. In the liver, part of meth is turned into amphetamine, a stimulant drug that has the same chemical structure. Both amphetamine and methamphetamine are released in the urine. The length of time meth stays in the body depends in large part on the drug’s elimination half-life, which is the amount of time it takes for the body to clear half the drug from the bloodstream.

Half-lives are not precise, however, and they can change depending on many physiological factors. The half-life of meth commonly ranges from six to fifteen hours. The pH level, or the acidity, of a person’s urine, may also impact how fast the drug is excreted. Other factors, which may include weight, age, and overall health, affect how fast meth is metabolized or discharged from the body.

So, how long does crystal meth stay in your system? That often depends on the strength and volume of the drug taken and how it is used. If you take a prescription recommended dose of 30mg it’s halved to 15 in your system within 12 hours. By 24 hours, you’re down to 7.5mg. At 60 hours, you’d have slightly less of a milligram of drug left in your system.

What Affects How Long Crystal Meth Stays in Your System?

Metabolic Rate

Metabolic rate is the number of calories needed to keep the body functioning at rest. An average man has a metabolic rate of around 7,100 KJ per day, while an average woman has a metabolic rate of about 5,900 kJ per day. If you have a high metabolic rate, you’ll process drugs much more quickly. Age, gender, activity level, and health will play a role. An 18–25-year-old man will most likely metabolize meth much more quickly than nearly any other demographic.

Body Fat

Lipids usually retain substances and store them. This could mean that people with a higher percentage of body fat will retain meth much longer. This, along with naturally slower metabolisms, is why most women typically show up positive on drug tests for longer as compared to men.

Rate of Use

The more the person uses meth, the harder it is for the body to metabolize the drug. The body will experience what is called “system saturation”. It means the body will retain the meth for a longer period of time. Frequent, heavy, and long-term abuse means meth will stay in the system for longer.


The liver and kidneys’ health will play a big role in how long crystal meth stays in your system. This is affected by your health, total drug use, infections, food, and more.


Injecting crystal meth means it will stay in your system much longer than someone smoking or using the drug orally. This isn’t true with prescription amphetamines designed for slow release with oral tablets but is true of crystal meth.

These hazardous effects can be worst if you are mixing crystal meth and alcohol.

How Long Does Meth Stay in Your System, Through Saliva?

How Long Does Meth Stay in Your System
Substance abuse and addiction can get out of hand quickly, so it is best to get professional help as soon as possible.

Same as most drugs, crystal meth can normally be detected in saliva or oral fluids for one day. However, in some cases, it can be detected up to three days later. Saliva samples are most often collected by placing an absorbent swab in between a person’s gums lower cheek. The swab is left in place for several minutes before the sample is sent to the lab for testing. Just like blood, saliva tests offer one of the shortest detection windows by detecting meth up to 48 hours after the last use. This factor is because substances like meth are immediately metabolized and eliminated from the membranes and secretions of the mouth, making it harder to identify them.

How Long Does Meth Stay in Your System, Through Hair?

Hair gives the longest detection period for meth. Methamphetamine can be detected in hair follicles as soon as seven to ten days after an individual has used it. The substance stays in the hair for up to ninety days. However, hair tests are usually expensive as compared to other types of testing. Illicit drugs such as cocaine, opioids, and meth tend to adhere more strongly to hair with darker pigments. Unfortunately, environmental contamination has been proved to cause false positives.

Tests using the hair sample are best suited for detecting heavy meth use. However, it won’t necessarily identify one-time use of the drug. A hair test will show what substance entered the body when it first entered the body, and when it last entered the body. Tips like dying your hair, baking soda bombs, or drinking a large amount of water do not help. The only way that will help you achieve a clean drug test is not taking drugs long enough before the drug test.

How Long Does Meth Stay in Your System, Through Urine?

The kidneys are primarily responsible for discharging methamphetamine from the body. They will excrete hydroxymethamphetamine, the byproducts of methamphetamine metabolism, 37-54% of methamphetamine eliminated by the body in the form of urine.

Urine testing is the most popular and cost-effective method to screen for meth use. This is because meth and its primary metabolite, amphetamine, will show up in urine within an hour of ingesting the drug. Samples of urine obtained from occasional meth users will test positive one to three days after last use. A chronic meth user might still test positive seven to ten days after using the drug.

How Long Does Meth Stay in Your System, Through Blood?

Substances are immediately metabolized and broken down in the bloodstream. As a result, while meth can be discovered using a blood drug test, the period for detection is narrow compared to other methods. Blood tests can be applied to detect the presence of a substance up to 2 days after the last dosage.

Find the Right Treatment Plan at We Level Up NJ

If you are asking yourself the question, how long does meth stay in your system, then it’s either you’re concerned about having too many drugs in your system or worried that you will test positive for the drug. Heavy meth users need to detox from the drug under the guidance of a medical professional who can supervise them safely through the withdrawal and treatment process.

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We Level Up New Jersey

Talk to one of our team members today to learn more about our treatment programs and how we can help you recover from meth mouth as a result of crystal meth addiction. Our team at We Level Up NJ specializes in creating an ideal environment and providing effective therapies to help individuals who struggle with crystal meth abuse. We will develop a personalized treatment plan and lead you to recovery. Get started today!


[1] CDC –

[2] We Level UpRehab » Meth Addiction Treatment