[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
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- partial dose data
- duration data present
- 19 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- partial dose data
- duration data present
- 19 combo interactions documented
- 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
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Inhalation | 20-40mg-min/m3 | - | - | - |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset |
|---|---|---|---|---|
| Oral | 30 min | 1-4 hrs | 8-12 hrs | 12-48 hrs |
| Inhalation | - | 1-3 hrs | 8-12 hrs | 12-48 hrs |
Effect Profile
4 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Psychedelic
2.6
Light+
3/10
Low visuals, headspace, and body load
Visual Intensity
×3
2
autonomous entities
Headspace Depth
×3
2
confusion
time distortion
Auditory Effects
×1
0
Body Load / Somatic Effects
×1
1
increased heart rate
Based on reports from:
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
- Difficulty Urinating
Negative
- Delirium
- Cognitive dysfunction
- Memory suppression
- Amnesia
- Confusion
- Analysis suppression
- Thought deceleration
- Disorientation
- Anxiety
- Paranoia
- Time distortion
Negative
- Visual acuity suppression
- Photophobia
- Visual Acuity Suppression
- External hallucination
- Internal hallucination
- Perception of bodily heaviness
- External Hallucination
- Internal Hallucination
- 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.
Erowid 4 reports 4 neutral 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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