Valerian root is one of the most common over the counter sleep aids on store shelves, usually sold as a capsule, tincture, or tea blend marketed for occasional sleeplessness or mild tension. People who take it before a pre employment or random workplace drug screen sometimes worry it will trigger a positive result, especially on the benzodiazepine panel, because both valerian and benzodiazepine medications are associated with sedation. The short answer is that valerian is a dietary supplement, not a scheduled drug, and standard drug test panels are not built to detect it or anything in it.
This article explains what a standard panel actually screens for, why valerian's active compounds are chemically unrelated to the benzodiazepine drug class, what the regulatory status of valerian as a supplement means for labeling and quality, and what an employee or employer should do if a screen comes back positive anyway. It does not offer medical or legal advice and does not suggest any way to interfere with a legitimate test.
What a standard drug test panel screens for
Most workplace and clinical urine drug tests use an immunoassay as the first step. An immunoassay uses antibodies designed to bind to a specific drug or drug class, such as amphetamines, cocaine metabolites, opiates, PCP, THC metabolites, or benzodiazepines. The antibody reaction produces a quick positive or negative screening result, but the antibodies can occasionally bind to other molecules that happen to share part of their chemical shape, which is how cross reactivity and unexpected screening results happen with some medications and foods. Any nonnegative screening result on a real laboratory specimen is supposed to be confirmed with gas chromatography mass spectrometry (GC/MS) or liquid chromatography mass spectrometry (LC/MS), which identifies the exact molecule present rather than a general class reaction. MedlinePlus explains this two step screen and confirm process and notes that a screening result alone is not considered a final finding.
The benzodiazepine panel on a standard drug test cup or dip card is built around benzodiazepine drugs such as diazepam, alprazolam, clonazepam, and lorazepam and their metabolites. Valerian's active constituents, mainly valerenic acid and related sesquiterpenes, are a completely different chemical family with no structural relationship to the benzodiazepine ring system. No published, credible evidence shows that valerian or valerenic acid produces cross reactivity on a standard benzodiazepine immunoassay, and a search of the published literature does not turn up a controlled study or validated case series reporting a false positive benzodiazepine screen from valerian use. Employers and screeners should treat a benzodiazepine positive result in a specimen as something to send to confirmation testing and the medical review officer, not something valerian use would be expected to explain.
The one interaction report worth knowing, and what it does not show
There is an older published case report, not a drug test study, describing a patient on prescribed lorazepam who also self medicated with valerian and passionflower and developed shaking, dizziness, and muscle fatigue, which the authors attributed to an additive sedative effect at the GABA receptor rather than to any laboratory test result. That case report is indexed on PubMed. It is evidence of a possible pharmacodynamic interaction between a benzodiazepine medication and herbal sedatives taken at the same time, meaning both substances may add to drowsiness, not evidence that valerian causes a positive benzodiazepine immunoassay result. The distinction matters because the two issues get confused online. A supplement that makes a person sleepier when combined with a prescribed sedative is a safety question, not a drug test chemistry question.
| Question | What the evidence shows |
|---|---|
| Does valerian trigger a positive benzodiazepine immunoassay? | No credible published cross reactivity data support this; standard panels target benzodiazepine drug molecules, not valerian compounds. |
| Can valerian add to drowsiness from a benzodiazepine medication? | A published case report describes additive sedation symptoms when valerian and passionflower were combined with lorazepam. |
| Will GC/MS or LC/MS confirmation identify valerian as a benzodiazepine? | No. Confirmation testing identifies the specific molecule present and would not misidentify valerenic acid as a benzodiazepine drug. |
| Is valerian reviewed and approved by the FDA the way a prescription drug is? | No. It is regulated as a dietary supplement under a different framework, described below. |
How valerian is regulated as a supplement
Valerian root is sold in the United States as a dietary supplement, which means it is regulated under the Dietary Supplement Health and Education Act framework rather than as an approved drug. Supplement manufacturers are responsible for ensuring their products are safe and for following labeling rules, but the FDA does not evaluate or approve dietary supplements for safety and effectiveness the way it does prescription or over the counter drugs, and a supplement label cannot claim to diagnose, treat, cure, or prevent a disease. The FDA's dietary supplement labeling guide lays out what a supplement label can and cannot say and confirms that structure or function claims, such as supporting relaxation, are handled differently than drug claims. That regulatory gap also means potency and purity can vary between valerian products and lots, which is one more reason a lab confirmation result, not an assumption about what a bottle label says, is the right basis for any employment decision.
The National Center for Complementary and Integrative Health's overview of valerian summarizes the available research on its use for sleep and anxiety, noting that study results are mixed and that valerian can cause drowsiness, headache, and stomach upset, and should not be combined with other sedating substances, including alcohol, without talking to a health care provider. NCCIH also notes that the amount of active compound can differ considerably from product to product, which is a direct consequence of how dietary supplements are regulated.
Safety sensitive work and sedation, separate from the testing question
Even though valerian will not register on a standard benzodiazepine or any other standard drug test panel, the sedating effect is a real workplace consideration for safety sensitive roles such as operating machinery, driving, or working at heights. An employee who feels groggy from a sleep aid, herbal or prescription, generally should not treat that grogginess as a drug test issue, but it may still be a fitness for duty issue that a supervisor or employer policy addresses separately from testing. For employees who hold a safety sensitive position covered by federal testing rules, such as drivers subject to Department of Transportation testing, the applicable procedures for specimen collection and the medical review officer's role in evaluating any laboratory result are set out in 49 CFR Part 40. Employers running their own workplace programs outside of a federally mandated testing program can review general program design considerations through SAMHSA's workplace resources, which cover drug free workplace policy elements and the role of a medical review officer in interpreting laboratory results.
What to do if a benzodiazepine result comes back positive
Because valerian itself is not expected to cause a positive benzodiazepine screen, a nonnegative result in someone who reports only taking valerian should be routed through the normal confirmation and review steps rather than explained away. A certified laboratory should confirm any nonnegative immunoassay result with GC/MS or LC/MS before it is reported as positive. A medical review officer should then review the confirmed result along with any prescription or medical information the employee provides, since legitimate prescriptions for benzodiazepine medications are common and are exactly why the MRO review step exists. An employee who takes valerian and is concerned about a result should keep the product packaging, be ready to tell the MRO everything they are taking, including over the counter and herbal products, and let the confirmation and MRO process run rather than trying to guess at the outcome beforehand.
What employers should keep in mind
Employers using drug test cups or dip cards that include a benzodiazepine panel should expect valerian use to be a nonissue for that panel in the overwhelming majority of cases, since there is no credible evidence of cross reactivity. Employers should still make sure every nonnegative screening result goes to confirmation testing and medical review officer evaluation before any employment action, document the chain of custody, and avoid treating a supplement disclosure, whether valerian, melatonin, or another product, as proof of anything on its own. A well designed program distinguishes a screening flag from a confirmed, medically reviewed result, and that distinction is what protects both the employer and the employee from an unfair outcome.
Frequently asked questions
Does valerian root show up as a positive on a drug test?
No. Standard immunoassay panels, including the benzodiazepine panel, are built to detect specific drug classes, and there is no credible published evidence that valerian's active compounds cross react with those antibodies.
Will valerian cause a false positive for benzodiazepines specifically?
Current evidence does not support that. Valerenic acid and the benzodiazepine drug class are chemically unrelated, and a search of the published literature does not turn up a validated report of valerian causing a false positive benzodiazepine immunoassay result.
Is there any published research connecting valerian to drug testing at all?
There is an older case report describing additive sedation symptoms in a patient combining valerian, passionflower, and prescribed lorazepam. That report describes a possible drug interaction affecting how sedated the patient felt, not a drug test result, and it does not show valerian interfering with a laboratory assay.
Can valerian affect someone in a safety sensitive job even if it will not show on a test?
Yes. Valerian can cause drowsiness in some people, and that is a fitness for duty consideration separate from drug testing, especially for roles involving driving or operating equipment.
If a benzodiazepine test comes back positive, should the employee just say they took valerian?
No. Any nonnegative screening result should go through laboratory confirmation and medical review officer evaluation. An employee should disclose everything they take, including supplements and prescriptions, to the MRO and let that review process determine the outcome rather than assuming any one product explains the result.
Is valerian approved by FDA as a sleep medication?
No. Valerian is sold as a dietary supplement, which is regulated differently than an approved drug, and supplement labels cannot make disease treatment claims.
Related reading
- Does Melatonin Show Up on a Drug Test? Supplements and Workplace Panels
- Does Ashwagandha Show Up on a Drug Test? Supplements and Panel Screens
Employers building or reviewing a benzodiazepine or multi panel testing program can see the current lineup of drug test cups at the American Screening Corporation drug test cup collection.
This article is general information only and is not legal or medical advice. Employers should consult qualified counsel and a medical review officer for decisions involving specific test results or policies.
