How Long Does Valium (Diazepam) Stay in Your System?
Valium — the brand name for the benzodiazepine diazepam — stays in your system far longer than most people realize. On average, diazepam is fully cleared from the body in 5 to 14 days, but it can show on a urine drug test for up to 6 weeks in chronic users and on a hair follicle test for up to 90 days.
This guide explains how Valium is metabolized, the drug test detection windows for urine, blood, saliva, and hair, the factors that speed up or slow down clearance, and what to do if you or a loved one has become dependent on Valium or another benzodiazepine in New Jersey.
Quick Answer — How Long Does Valium Stay in Your System?
- Urine: 1 to 6 weeks
- Blood: 6 to 48 hours
- Saliva: 1 to 10 days
- Hair follicle: up to 90 days
- Full elimination from the body: 5 to 14 days on average
These are averages. Your age, liver function, body fat, and how long you have been taking Valium can shift each window significantly.
What Is Valium (Diazepam)?
Valium is the original brand name for diazepam — a long-acting benzodiazepine first approved by the FDA in 1963. It is a Schedule IV controlled substance in the United States and is prescribed to treat anxiety, muscle spasms, alcohol withdrawal, and certain types of seizures.
Diazepam works by enhancing the activity of GABA — the brain's primary inhibitory neurotransmitter. That is what makes Valium calming, sedating, and muscle-relaxing. It is also what makes it habit-forming: with regular use, the brain adapts, tolerance builds, and physical dependence can develop within a few weeks.
The Half-Life of Valium — Why It Stays So Long
Valium has one of the longest half-lives of any benzodiazepine. The half-life is the time it takes your body to eliminate half of the drug from your bloodstream.
- Diazepam half-life: 20 to 70 hours
- Nordiazepam (active metabolite) half-life: 40 to 200 hours
- Other active metabolites: oxazepam and temazepam — both detectable on standard benzodiazepine urine tests
Because a drug is generally considered "cleared" after 5 half-lives, and because nordiazepam is itself active and long-lasting, full elimination of Valium typically takes 5 to 14 days — and can take longer in older adults or people with impaired liver function.
Valium Drug Test Detection Windows
Different drug tests look for diazepam and its metabolites over different windows. Here is what each type of benzodiazepine test can detect:
Urine test — 1 to 6 weeks
Standard urine drug tests detect diazepam and its metabolites (nordiazepam, oxazepam, temazepam) for 7 to 10 days after a single dose — and up to 4 to 6 weeks in people who have used Valium chronically or at high doses.
Blood test — 6 to 48 hours
Blood testing has the shortest detection window and is typically only used in hospital or DUI settings. Diazepam itself is measurable for roughly 6 to 48 hours after the last dose.
Saliva test — 1 to 10 days
Oral fluid (saliva) testing can detect Valium for about 1 to 10 days depending on dose and frequency of use.
Hair follicle test — Up to 90 days
Hair testing offers the longest lookback window and can detect diazepam use for up to 90 days after the last dose — though it is less sensitive to a single, one-time use.
Important note: standard 5-panel workplace drug tests do not screen for benzodiazepines. A benzodiazepine screen — commonly part of a 10-panel or 12-panel drug test — is required to detect Valium.
What Affects How Long Valium Stays in Your System?
Every person clears diazepam at a slightly different rate. The main factors are:
- Age — older adults metabolize diazepam much more slowly, sometimes doubling or tripling the effective half-life.
- Liver function — Valium is processed by the liver, so impaired liver function extends clearance time significantly.
- Body fat percentage — diazepam is highly fat-soluble and accumulates in fatty tissue, extending detection windows.
- Frequency and dose — chronic, high-dose use leads to buildup and longer clearance than a single low dose.
- Other medications — drugs that affect the CYP3A4 and CYP2C19 liver enzymes can slow or speed up metabolism.
- Kidney function, hydration, and general metabolic rate also play a role.
Can You Speed Up How Fast Valium Leaves Your System?
There is no safe or proven way to flush Valium out of your body faster. Diazepam is metabolized in the liver on a fixed timeline that hydration, exercise, and detox teas cannot meaningfully change. Attempting rapid detox from a benzodiazepine at home is dangerous — abrupt withdrawal can trigger seizures.
If you are physically dependent on Valium, the only safe path off it is a medically supervised taper — typically over several weeks or months, sometimes using a longer-acting substitute benzodiazepine and adjunct medications to control symptoms.
Valium Withdrawal — What to Expect
Because Valium has such a long half-life, withdrawal symptoms often do not begin until 2 to 7 days after the last dose — and can last for weeks or even months in a pattern known as protracted withdrawal (or PAWS — post-acute withdrawal syndrome). Common symptoms include:
- Rebound anxiety and panic attacks
- Insomnia and disturbed sleep
- Tremors and muscle twitching
- Sweating, elevated heart rate, and high blood pressure
- Nausea, vomiting, and appetite loss
- Sensory hypersensitivity to light and sound
- Seizures (a medical emergency — never stop Valium abruptly without supervision)
- Hallucinations or psychosis in severe cases
Benzodiazepine withdrawal — including diazepam — is one of only two categories of drug withdrawal (alongside alcohol) that can be fatal without medical care. If you have been taking Valium daily for more than a few weeks, do not stop cold turkey. Speak with an addiction medicine physician first.
Signs You May Be Dependent on Valium
Physical dependence on Valium can develop even when it is used exactly as prescribed. Signs include:
- Needing higher doses of Valium to get the same calming effect (tolerance).
- Feeling anxious, shaky, or unwell when a dose is missed or late.
- Taking Valium more often or in larger amounts than prescribed.
- Using Valium to cope with everyday stress, not just the original medical reason.
- Combining Valium with alcohol or opioids to boost its effect.
- Doctor shopping or buying diazepam online or on the street.
- Wanting to cut back but being unable to.
Mixing Valium with Alcohol or Opioids — a Fatal Combination
Valium is a central nervous system depressant. Combining it with other depressants — including alcohol, opioids like oxycodone or fentanyl, or other benzodiazepines like Xanax or Klonopin — dramatically raises the risk of respiratory depression and overdose death.
According to the CDC, benzodiazepines are involved in a large share of opioid overdose deaths in New Jersey and nationwide. If you are using Valium alongside other substances, please seek medical guidance before stopping any of them.
Benzodiazepine Addiction Treatment in New Jersey
Cherry Hill Recovery Center treats benzodiazepine use disorder — including Valium, Xanax, Klonopin, and Ativan — for patients across South Jersey.
Medically Supervised Detox & Taper
For patients requiring supervised withdrawal, our clinical team coordinates detox placement and manages a gradual taper — typically converting Valium (or a shorter-acting benzo) to a stable long-acting protocol and reducing the dose slowly to minimize withdrawal risk.
PHP and IOP for Benzodiazepine Use Disorder
Once medically stable, most patients step down into our Partial Hospitalization Program (PHP) or Intensive Outpatient Program (IOP). These structured outpatient programs combine individual therapy, group counseling, CBT and DBT skills work, relapse prevention, and psychiatric oversight for co-occurring anxiety and insomnia — the conditions that most often drive Valium use in the first place.
Dual Diagnosis Care
Because so many Valium users are self-treating an underlying anxiety, panic, or trauma disorder, our psychiatric team provides integrated dual diagnosis treatment — replacing benzodiazepine dependence with non-addictive, evidence-based medications and therapy protocols that actually treat the root condition.
Does Insurance Cover Valium Addiction Treatment in New Jersey?
Yes. Most major commercial insurance plans — Aetna, Cigna, United Healthcare, Blue Cross Blue Shield Horizon NJ, Anthem, and others — cover PHP, IOP, and outpatient benzodiazepine treatment under federal mental health and substance use disorder parity laws.
Verify your coverage instantly — free, confidential, 60 seconds: cherryhillrecoverycenter.com/verify-insurance.
Frequently Asked Questions
How long does one dose of Valium stay in your system?
A single 5 to 10 mg dose of Valium is typically fully cleared within 5 to 10 days in a healthy adult, though it can still show on a urine drug test for up to 10 days.
Will Valium show up on a standard drug test?
Only if benzodiazepines are part of the panel. A standard 5-panel test does not detect diazepam. A 10-panel or 12-panel test does.
How long does it take for Valium withdrawal to start?
Because diazepam has such a long half-life, acute withdrawal typically starts 2 to 7 days after the last dose and can persist for several weeks.
Can I detox from Valium at home?
No. Benzodiazepine withdrawal can cause seizures and should always be managed with a medically supervised taper.
Ready to Get Help for Valium or Benzodiazepine Dependence in NJ?
Cherry Hill Recovery Center provides confidential, evidence-based treatment for benzodiazepine addiction — including Valium, Xanax, Klonopin, and Ativan — across Cherry Hill and South Jersey.
Our admissions team answers 24 hours a day. Free confidential assessments in under 15 minutes. Most major insurance accepted.
Medical disclaimer: This article is for educational purposes only and is not a substitute for professional medical advice. Never stop taking Valium or any prescribed benzodiazepine without consulting a physician.