[Erowid Note: This transcript of an Army volunteer's experience with BZ is reproduced from Chemical Warfare by James Ketchum, © 2006 by the author. Used with permission.] dose: 7.0 ug/kg. On Thursday morning at about 8:30 AM I was injected with a drug [BZ].
3-Quinuclidinyl benzilate
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 2 corroborating sources
- duration data present
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 2 corroborating sources
- duration data present
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
Aliases: Bz, Qnb, Ea-2277, Agent buzz, Substance 78
Summary
BZ is an extremely potent, long-lasting anticholinergic deliriant originally developed as a military incapacitating agent. Even sub-milligram doses produce profound delirium, confusion, vivid hallucinations, amnesia, and severe anticholinergic toxicity lasting days. Effects include dangerous hyperthermia, tachycardia, urinary retention, and complete loss of contact with reality.
Dose Information
Dose basis. No recreational dose ladder is published for BZ, and it is not a drug anyone doses by eye — it is an incapacitating agent developed for military use, active in the sub-milligram range. The inhalation figure this page used to show was an exposure value in mg·min/m³ (airborne concentration multiplied by time), not a weight in milligrams; it was being plotted on the same scale as the oral dose and has been removed. Effects last for days rather than hours, and the margin between an incapacitating exposure and a dangerous one is not well characterised in humans.
| ROA | Threshold |
|---|---|
| Oral | 0.035mg |
Only a threshold dose is documented for this substance — the smallest amount with a noticeable effect. There is no published light/common/strong ladder to show above it.
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 30 min | 1-4 hrs | 8-12 hrs | 12-48 hrs | 21.5-64.5 hrs |
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Name
3-Quinuclidinyl benzilate
Unit
mg
Description
3-Quinuclidinyl benzilate Source: SubstanceSearch (substancesearch.com) Oral dose (mg): threshold 0.035 Oral duration: onset 30m · come-up 1-4h · peak 8-12h · offset 12-48h · total 21.5-64.5h · after-effects 24-96h Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.
The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.
Tolerance
Build-up
develops rapidly after a single use
Reset
7–14 days for baseline
Tolerance Decay
Half tolerance
14d
Baseline
~28d
Robust quantitative data are lacking. Military summaries note that a second exposure 2–4 weeks later can show faster onset and heightened peak effects (“second‑dose effect”). Treat cross‑tolerance estimates as speculative.
Cross-Tolerances
Effects
Negative
- Pupil dilation
- Increased heart rate
- Dry mouth
- Extreme Dry Mouth And Dehydration
- Severe Pupil Dilation
- Sedation
- Difficulty urinating
- Hyperthermia
- Spontaneous Bodily Sensations
Negative
- Delirium
- Cognitive dysfunction
- Memory suppression
- Amnesia
- Confusion
- Analysis suppression
- Thought deceleration
- Disorientation
- Anxiety
- Paranoia
- Time distortion
Negative
- Visual acuity suppression
- Photophobia
- External hallucination
- Internal hallucination
- Perception of bodily heaviness
- Realistic And Indistinguishable Hallucinations
- Autonomous Entities
Combinations
Cross-Check 3-Quinuclidinyl benzilate with another substanceCommunity Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.
Erowid 4 reports 3 neutral 1 cautionary visit
The following is excerpted from the 1962 lab book of Dr. James Moore, who was accidentally exposed to BZ during a BZ synthesis he was completing for the CIA. Four days after the exposure, he ingested 100 mg of acridine as an antidote.
During 1964 at Fort Detrick, MD (as well as other places) several soldiers volunteered for testing with the bizarre drug; BZ. I was one who underwent the experience at Ft. Detrick. BZ was almost like a cross between Ketamine/PCP and LSD (not actually but that is what it felt like).
All brain cell firing is an electrical action. As with other quinines where you notice stimulation of a certain area of the brain that is definitly electrical, mabye a slight tingle and inability to sleep, with the more powerful complex quinines like bz it is more like an electrical current is being applied, a notion o...
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