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How Long Does Valium Stay In Your System?

how long does valium stay in your system

Prescription drug valium can also be used to treat a variety of diseases, but its main purpose is to reduce anxiety. It goes by two names: diazepam and benzodiazepine.

There are a number of good reasons why you might be curious about the duration of action of valium in your body. To start, like any drug that slows brain activity, valium has the risk of overdosing if used in large doses or when combined with other CNS depressants. Any time you are subjected to a drug test, you might be curious about the duration of time that valium remains in your system. If you have a dependence on Valium, you might be curious about the possible onset of withdrawal symptoms. 

Let’s dive into this curiosity.

What Is Valium? 

Valium (diazepam), a member of the benzodiazepine drug class, treats a variety of medical conditions, including muscle spasms and seizures. Its off-label use includes prescriptions for treating anxiety and insomnia. Moreover, there are a number of methods of administration for Valium, including pills, oral solutions, and injectables. 

Also, The potential for misuse, addiction, and dependency is high because it is a Schedule IV prohibited substance. This is why it’s important to know how long Valium stays in your system for a number of reasons, such as drug tests, changing dosages, and possible drug interactions.

How Does Valium Work In Your Body? 

As a member of the benzodiazepine family of medicines, valium has a sedative effect by acting on the central nervous system. It reduces anxiety and tension by amplifying the action of a neurotransmitter, gamma-aminobutyric acid (GABA) that slows down brain activity in different areas involved in emotion regulation, cognition, memory, and autonomic processes like breathing.

What is the duration of Valium’s effects? 

Valium can be administered orally, intravenously, or as a rectal gel. The onset of effects after an injection of valium is rapid, taking about 1-5  minutes. However, the usual beginning of action for oral dosing is between 15-16 minutes after administration. Seizure sufferers may find relief using valium in rectal gel form, which starts functioning soon after its application. Now, you understand how long it takes to feel the effects of diazepam, it’s important to remember the following conditions:

  • Overdosing on Valium (diazepam) can lead to dangerous adverse consequences.
  • A dependency on valium (diazepam) is possible. It is possible to build up a tolerance to valium over time. For that reason, you might need to increase the amount you take.
  • If you take additional medications before your body completely eliminates valium, it may cause dangerous, even life-threatening, side effects. Also, combining valium with other sedatives, sleeping pills, or tranquilizers poses a significant risk to the health of a user. 

How Long Do Valium’s Effects Last In Your Body?

The half-life of valium is around 48 hours. The amount of time it takes for half of a dosage of a medicine to be removed from the body is called its half-life.

This signifies that the half-life of the drug in the body is at least 20–80 hours longer than the first dose. Then another 20–80 hours will pass before half of that amount leaves the system entirely, and the process continues thereafter in the same manner. As a result, the elimination of diazepam from the body may take multiple days after a single dosage. Complete elimination of the drug from the body can take weeks in cases where extremely large doses are used over long periods of time. For some users, the full elimination of the medication from their system could take as long as six weeks. 

So, if you ask, how long does valium last 5mg? Or how long does valium last 10 mg? The answer is that the physiological effects will wear off in about 5 to 6 hours, but the elimination of the drug’s metabolites will take much longer, depending on how your body reacts to it.

Factors Effecting The Elimination Of Metabolites 

The amount of time that valium remains in your system is dependent on a number of factors, some of which are as follows:

  1. Dosage: The metabolism and elimination of valium from the body may be delayed with higher doses.
  1. Frequency of use: Long-term usage of valium increases the risk of buildup and slows its removal from the body.
  1. Individual Metabolism: Each person’s metabolic rate is different, which impacts how quickly valium is broken down and flushed out of the body.
  1. Age: Older adults may process valium more slowly than younger adults, which can make it take longer for them to leave their bodies.
  1. Liver Function: If your liver doesn’t work right, it can mess up your digestion and make it harder for your body to get rid of valium.

Drug Test For Valium

Lots of different drug tests can pick up on valium (diazepam) and its byproducts. Different types of tests are utilized in different situations, such as medical examination, legal investigations, and job screening, and each has a varied detection window. These are the main drug tests that evaluate valium levels:

1. Urine Test

Diazepam urine detection time: Urine testing can identify valium levels up to 1–6 weeks following the last dosage.

Usage: The non-invasive nature and relatively lengthy detection window of urine tests make them the most popular kind of drug testing for Valium. This test can detect the diazepam metabolites in urine easily. In the judicial system, rehabilitation programs, and during employment screenings, they are commonly utilized.

2.Blood Test

Diazepam blood detection time: It usually takes 1–3 days following the last dosage of Valium for the drug to be detectable in the blood.

Usage: Although blood tests are not frequently used, they can be utilized in medical or legal contexts that demand an accurate assessment of present intoxication levels of valium, including when there is a suspicion of overdose or impairment.

3. Saliva Test

Diazepam saliva detection time: Saliva samples taken 1–10 days following a dose of Valium can still show traces of the drug.

Usage: Saliva tests are pretty simple to use and are often used when screening needs to be done quickly and without any pain, like when police stop someone on the side of the road and do a drug test.

4. Hair Test

Diazepam hair detection time: The effects of valium on hair follicles might be felt for at least 90 days following the last dosage.

Usage: When evaluating long-term drug usage, such as in forensic investigations or legal proceedings, hair tests are utilized because of their long detection window.

Also Read: Can Adderall Help with Pain?


To sum up, factors such as dosage and individual characteristics can affect how long Valium stays in your system. Despite the fact that valium usually has an impact that lasts a few hours, its metabolites might stay in your system for days or even weeks after you stop taking it. To ensure safe and effective medication management, always consult your doctor so that you can even buy prescription medications online. Likewise, you can also get Anti Anxiety medication online without any prescription. This is especially important when considering dosage modifications or undergoing drug testing. For specific instructions on how to take Valium or any drug, go to your doctor and you can buy valium online.


Medically Reviewed By

Dr. Melissa J. Roybal
Dr. Melissa J. Roybal

Melissa has over 15 years of experience since graduating from Georgetown University, specializing in pediatrics, adult, and geriatric care. She is passionate about helping patients via telemedicine for various conditions.

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