Skip to main content
Lyrea avatar

Not yet reviewed — this article is pending editorial review by Lyrea.

Citation noticeOur citation system is being overhauled

References and citation markers may currently be incomplete, mismatched, or incorrect. This system is being rebuilt and reviewed before the full site launch.

Barbital

This article is a stubmissing:
Subjective Effects
Pharmacology
Interactions
Tolerance
History & Culture
Legality
Barbital molecule structureBarbital molecule structure
Chemical Class
Barbiturate

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Moderate650-970 mg

Duration

Onset15-30 minutes
Total6-12 hours

Subjective Effects

Subjective Effects not written up yet

Reagent Testing

Expected colorimetric results for common reagent tests. Colors show reaction change over 1–2 minutes.

Marquis(MQ)
No reaction
No reaction
Mecke(ME)
No reaction
No reaction
Mandelin(MD)
No reaction
No reaction
Powered by PROtestkit.eu

Pharmacology

Pharmacology not written up yet

Interactions

Interactions not written up yet

An unlisted combination is an unknown one, not a safe one. Check a dedicated combination chart before mixing.

Check TripSit

Tolerance

Tolerance not written up yet

Harm Potential

Addiction & Dependence

Psychological

High

Barbital is classified as habit-forming with significant potential for psychological dependence. Prolonged usage leads to tolerance, requiring higher doses to achieve desired effects, which can drive compulsive use patterns.

Physical

High

As a barbiturate, barbital produces physical dependence with chronic use. Tolerance development is well-documented, indicating physiological adaptation that would result in withdrawal symptoms upon cessation.

Toxicity

Lethal Dosage

The lethal dose is approximately 3.5 to 4.4 grams orally. Fatal overdoses were historically common due to the drug's slow onset of action, which led users to take additional doses before feeling effects. Numerous documented deaths occurred both accidentally and intentionally.

History & Culture

History & Culture not written up yet

Legality

Legality not written up yet

Article Status

  • Josie Kins avatar
    Step 1 · Automated synthesis

    An autonomous workflow built by Josie Kins compiled this article's foundation from information published across the web.

  • Step 2 · First-pass reviewPending

    Not yet reviewed — this article is pending editorial review by Lyrea.

  • Step 3 · Citation reviewPending

    No one has reviewed this article's citations yet. That second pass checks each claim against the source it cites.

Recent changes7 human edits · latest

Times are UTCNewest first

24 January 2026

  1. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  2. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  3. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  4. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  5. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  6. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  7. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

All changes to this article · Site-wide recent changes

Suggest an edit

Spotted a mistake, an outdated claim, or something missing from the Barbital article? Send the editors a private note. Feedback lands in a moderation queue and is never shown on the site.

Wish to give generalised feedback? You can do so here.