How Long Does Valium Stay In Your System?

How Long Does Valium Stay In Your System?

Important InformationThis information is for educational purposes only. We never invite or suggest the use, production or purchase of any these substances. Addiction Resource and it’s employees, officers, managers, agents, authors, editors, producers, and contributors shall have no direct or indirect liability, obligation, or responsibility to any person or entity for any loss, damage, or adverse consequences alleged to have happened as a consequence of material on this website. See full text of disclaimer.

People are often eager to know how long Valium stays in the system. Maybe, they are planning for pregnancy or a drug test. In any case, it is crucial to know that Valium may be present in the urine or blood long after the last dose. Also, you should be aware how long to wait to take a test after taking it, because it takes time for the drug to become detectable in the urine or blood sample.

A Quick Overview Of Valium

It contains Diazepam which is a benzo. It calms down the excited nerves and thus produces sedation. For this reason, doctors prescribe it to treat anxiety, seizures and alcohol withdrawal symptoms. Moreover, it relieves muscle cramps and may also be used before a major surgery.

It may cause an addiction and the risk increases if you abuse it. Thus, you should strictly follow your doctor’s instructions.

What Factors Influence How Long Valium Stays In Your System?

The factors that influence how long Valium stays in your system are:

  • Age. If you are above 65, you may get a higher value in the blood sample.
  • Weight. A person with obesity is more likely to retain it for longer.
  • Liver disorders like cirrhosis or hepatitis slow down its elimination from the body.

Also, the dose you take also determines the duration. In a normal case, the higher the dose you take, longer the time it will take to flush.

Help Line Woman

Hope Without Commitment

Find the best treatment options.
Call our free and confidential helpline

Most private insurances accepted

Marketing fee may apply

How Is Valium Metabolized?

Metabolism is a biological process that converts a drug into other chemicals. The products of metabolism are called metabolites, while the portion of the drug that survives metabolism is called a parent or unchanged drug. A significant portion of ingested or injected Valium is metabolized by the liver enzymes. The major metabolites of Valium are Nordiazepam, Temazepam, and Oxazepam.

How Long Valium Effects Last

You may start experiencing Valium effects within thirty minutes of taking it. Moreover, you may experience them for the next 12-24 hours.

Valium has a half-life of 43±13 hours. The metabolites of Valium have higher half-lives. Notably, the active metabolite Nordiazepam has a half-life of 40-99 hours. Considering the additive effects of the metabolites, the half-life can go up to 100 hours. Thus, it would not be too wise to assign a number for how long Valium stays in your system.

You may have positive Valium urine test even several days or weeks after the last dose. This is owing to the longer half-lives of the metabolites. The amount of the parent form in the urine is less than one percent. Meaning, metabolites are predominantly present in the urine sample. They are Temazepam and Oxazepam.

Since it has a long half-life, it can accumulate in your body, especially when you have been taking it for a long time. In a blood test, chronic users can have a higher concentration compared to the one time user. Interestingly, old users also tend to have a higher blood concentration.

When you take it in normal doses, the blood concentration of Valium ranges from 0.1-1.0 mg/L. Anything higher could indicate an abuse. Addicts may take several tablets at a time. Alternately, they may crush a tablet to inject. The gel forms may be inserted into the rectum.

Drug Testing Information For Valium

Urine Test

How Long Does Valium Stay In Your System?

The elimination half-life of Valium is more than 24 hours. Notably, in a normal case, after five half-lives, the drug is virtually undetectable in the urine. So, its presence in the urine sample greater than the limit of quantification indicates exposure within a 5 to a 20-day interval preceding specimen collection. After you take it, the parent form and metabolites become detectable within 30 minutes. Moreover, their urine concentrations peak between after an hour up to 8 hours.

Blood Test

You may go for a blood test one to two and a half hours after taking a Valium tablet. If you use an injection, you can immediately detect it in your blood. In both cases, Valium can stay in the blood for more than a week. Meaning, you may test positive even weeks after discontinuing the use. Remember that a possible positive or negative test result also depends on the sensitivity of the testing method.

Hair Analysis

If you have been using/abusing it for the last three months, the hair analysis may show a positive test result. It may be present in the hair stands for several weeks to months after you stop taking it. Indeed, hair analysis for drug testing is still in infancy. Other more reliable and easy tests that use urine and blood samples are more preferable.

Things To Know

When you go for a test to detect Valium, they measure both the parent drug as well as its metabolites. That said, even you take a drug with a short half-life, you may still test positive. This is when the metabolites have longer half-lives.

Longer half-lives do not always mean you will experience the drug effects for a long duration. In fact, the half-life is the time necessary to achieve half the initial concentration. This does not take into account the amount the drug present in the body, rather only the drug in the blood is considered. This is where we go wrong quite often. For a drug to show its effects, it should be present in the site where it acts, not always the blood.

Take an example, Valium has a long half-life, but its effects go away within a short time. The reason, it stays in the blood but not in the brain for a long time. But this does not take away the fact that you may get positive urine or blood result even days after your last dose.

Want To Know More?

Talk to the experts to know more about how long does Valium stay in your system? They are one of the few sources for an authentic health information. With the correct information, you can expect to benefit better.

Looking for professional medical help for Valium or benzo addiction? Get the best rehabs page here.

View Sources
  1. S Dhillon, J Oxley, A Richens. Bioavailability of diazepam after intravenous, oral and rectal administration in adult epileptic patients. Br J Clin Pharmacol. 1982 Mar; 13(3): 427–432.
  2. U Klotz, G R Avant, A Hoyumpa, S Schenker, G R Wilkinson. The effects of age and liver disease on the disposition and elimination of diazepam in adult man. J Clin Invest. 1975 Feb; 55(2): 347–359.


Leave a comment

  • Marc
    I took 2 valiums on Monday. It was the First time I’ve ever taken them I have a job interview next Monday. Will I be safe to provide a urine sample?
    • dave
      if it is prescription you have no worries just tell them you have a script for it.
    • Marlaina
      It will probably still be in your system I took them one time before n it stayed in my system for about 3 weeks. I did take Xanax days prior before I took the valium.
  • Melanie
    How about after 7 days?I only took 1 for nerves and Im going for a urine test Friday. I take ocycodone for pain does that mske it worse?
    • Marlaina
      I took valium n it stayed in my system for about 3 weeks, I did take Xanax prior beforedays before. But I only took the valium that one time. All opioid stay in your system for 3 to 4 days usually 3 days.
      • Deborah
        Valium is a Benno not a narcotic and can stay in your urine up to 23 days.Narcotics will be in your urine 3,4 or even up to 6 days.
  • Hawa
    Hi I took one pill on Sunday night and Monday night and I am going to drug tests on Friday. I am gonna be positive ?
  • Victor
    I took 20 milagrams of Valium Then I read that it takes 23 days For 10 milagrams to leave your system . I have to take a drug test How much longer past the 23 Days for 10 milagrams to leave My system do I have to wait For the full 20 milagrams to Leave my system and I can Pass a drug test and not test Positive for Valium?
  • To Tami
    I took a 2 mg volume on Sunday round 9pm and had to do urine test for a job on Monday round 330 pm will it still be in my urine.
  • Brielle
    I gave up taking Valium and all other benzodiazepines about a week ago. My next urine test won’t be for about 45 days. Will it finally be out of my body by then? Because it seems to stick around FOREVER!! All answers are much appreciated!!
  • Larry
    This was a very interesting article I wasn’t sure what to expect from Matt