What Is Barbiturates? Drug Class, Schedule & Drug Test Answers

Evidence-based answer reviewed against SAMHSA cutoffs and FDA assay documentation · Updated September 2026

Quick answer: Barbiturates is a Depressant (GABA-A prolonger). Schedule II–IV by agent. Here's how the drug is classified, whether it's a narcotic/controlled substance, and what that means for testing.

What is Barbiturates?

Drug class: Depressant (GABA-A prolonger)

Federal schedule: Schedule II–IV by agent.

Barbiturates ride along on 10/12-panel cups as the legacy 'BAR' strip. Prescriptions are uncommon today (butalbital migraine combos like butalbital migraine tablets persist).

Is Barbiturates a narcotic?

It is classified as a narcotic under the DEA's federal schedule. What matters more for you: Schedule II–IV by agent..

Does it show up on drug tests?

No — it is not on the standard 5-panel; it appears only on expanded or panel-specific orders. See the full Barbs drug test guide for detection windows and cutoffs.

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Medical disclaimer: DrugPanels provides educational information about laboratory drug testing and does not offer medical advice, diagnosis, or treatment. Detection windows are population ranges — individual results vary with metabolism, dose, frequency and health status. Never stop prescribed medication to pass a test without talking to your prescriber. Affiliate disclosure: some links on this page are affiliate links; if you order through them we may earn a commission at no additional cost to you.

People also ask

Do Barbiturates Show up on a Drug Test?

No — Barbs is absent from standard drug panels. Full guide →

How Long Do Barbiturates Stay in Your Urine?

How long Barbs stays detectable in urine — urine, hair, saliva & blood windows explained with cutoffs. Full guide →

How to Pass a Drug Test for Barbiturates?

Evidence-based ways to pass a drug test for Barbs — realistic timelines, what works, what backfires, and dilution flags to avoid. Full guide →

Barbiturates Drug Test Guide: Panels, Detection Windows & More?

Complete Barbs drug test guide: which panels detect it, urine/hair/saliva/blood detection windows, cutoff levels and prescription verification. Full guide →

Do prescriptions count against me?

No — verified prescriptions report as negative through the Medical Review Officer. Declare medications at collection and answer the follow-up call.

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Sources & further reading

  • SAMHSA — Mandatory Guidelines for Federal Workplace Drug Testing Programs (cutoffs, MRO process)
  • DOT — 49 CFR Part 40 procedures for transportation workplace testing
  • Brahm NC et al., Mayo Clinic Proceedings 2008;83(1):66–76 — false-positive cross-reactivity reference
  • FDA — drug-of-abuse test device labeling (detection window conventions)