Prequel: I wanted to specifically enter this story, as it is the most recent enjoyable trip I have had with the nBomes and since that there is barely anything on 25B, which I have nicknamed her Beautrice-25 for her incredible beauty, the gemstone of all nBomes that are more of a true psychedelic than just a common good...
25B-NBOMe
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 19 combo interactions documented
- PubChem toxicity data
- classified Research-chemical
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 19 combo interactions documented
- PubChem toxicity data
- classified Research-chemical
Aliases: 25b
Summary
25B-NBOMe (also known as Cimbi-36, NBOMe-2C-B and 2C-B-NBOMe) is novel psychedelic substance of the phenethylamine class. It is a member of the 25x-NBOMe series, a recently discovered group of potent psychedelic compounds derived from the 2C-x family. The name 25B-NBOMe, which is short-hand for 2C-B-NBOMe, indicates it is a derivative of the phenethylamine psychedelic 2C-B.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Insufflated | 50-200ยตg | 200-350ยตg | 350-500ยตg | 500ยตg+ |
| Sublingual | 100-300ยตg | 300-500ยตg | 500-700ยตg | 700ug+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Insufflated | 1-4 min | - | 8-12 hrs | - | 8-12 hrs |
| Sublingual | 18-42 min | 30-90 min | 4-6 hrs | 2-4 hrs | 8-12 hrs |
Effect Profile
40 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 33 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Psychedelic
8.8
Intense+
9/10
Strong visuals, headspace, auditory effects, and body load
Visual Intensity
×3
10
internal hallucinations
autonomous entities
colour enhancement
drifting
tracers
colour shifting
+6 more
Headspace Depth
×3
10
conceptual thinking
thought connectivity
emotion enhancement
perspective alterations
personal bias suppression
confusion
+1 more
Auditory Effects
×1
10
auditory distortion
auditory enhancement
auditory hallucinations
auditory hallucination
Body Load / Somatic Effects
×1
10
nausea
vasoconstriction
muscle tension
increased heart rate
Based on reports from:
Tolerance
Build-up
develops rapidly after a single use; redosing is especially dangerous
Reset
7โ14 days for baseline
Tolerance Decay
Full tolerance
1h
Half tolerance
10d
Baseline
~14d
Acute tolerance: develops within a single session โ the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Aggregated from 33 Erowid and 7 Bluelight experience reports
Positive Effects 30
Color Enhancement
55.0%
85%
Stimulation
47.5%
80%
Music Enhancement
47.5%
90%
Entity Imagery
42.9%
77%
Joy
42.9%
83%
Euphoria
42.5%
90%
Tactile Enhancement
39.4%
70%
Empathy
32.5%
75%
Focus Enhancement
32.5%
70%
Introspection
30.0%
80%
Geometric Imagery
28.6%
85%
Pattern Recognition Enhancement
28.6%
75%
Open-Eye Visuals
28.6%
85%
Visual Trails
14.3%
70%
Gratitude
14.3%
85%
Contentment
14.3%
80%
Drowsiness
14.3%
80%
Insight
14.3%
80%
Sociability Enhancement
14.3%
75%
Brightness Enhancement
14.3%
80%
Adverse Effects 31
Visual Distortions
80.0%
82%
Anxiety
62.5%
88%
Confusion
45.0%
85%
Nausea
30.3%
70%
Muscle Tension
30.0%
75%
Dizziness
28.6%
85%
Panic
28.6%
88%
Fear
28.6%
90%
Body Temperature Change
28.6%
78%
Auditory Effects
27.5%
80%
Sedation
27.5%
85%
Thought Loops
25.0%
88%
Stomach Cramps
14.3%
75%
Pressure
14.3%
80%
Morphing
14.3%
85%
Motor Suppression
14.3%
75%
Field Narrowing
14.3%
75%
Auditory Delay
14.3%
70%
Body Distortion
14.3%
80%
Communication Suppression
14.3%
80%
Combinations
Cross-Check 25B-NBOMe 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 8 reports 2 positive 4 neutral 2 cautionary visit
I've tried 25i-NBOMe and 25c-NBOMe prior to this. I knew 25b would be amazing as well. The setting was in my room with easy access to music, drawing, and my computer. It was mainly a test to experiment this compound before doing it at another setting.
[Erowid Note: A first hand report of an experience and report of a fatality. From Reddit/r/Drugs . Reposted with permission. We have not yet received independent confirmation of this fatality, but believe it is factual.] This past Friday, I came home from classes around 2:30 PM and found my younger, 18-year-old brother...
Throughout the past 2 years, I've been a semi-regular user of numerous substances, to keep the list short I'll only mention the ones I've done more than 15-20 times, they include Ketamine, LSD, 4-MEC, 4-FA , shrooms, MDMA, cannabis of course, and a few other 'designer' amphetamines, so I'm not an expert by any means on...
To start, a bit about myself. I live in the UK, and got hold of some NBOMe series chemicals from what appeared to be a reputable website after having an interest in taking hallucinogens for a few years and doing a lot of research. In the end I ended up buying on a whim and, frankly, I wish I'd tried them earlier.
Set: Just woke up from 6 hours of sleep. Setting: Friday Afternoon, around my college town. Previous Experiences: Cannabis, 6-APB, MDMA, 4-AcO-DMT, 2C-E, 2C-T-2, 25C-NBOMe, 25I-NBOMe, Mushrooms, DMT, Amphetamine, 2C-I, 5-MeO-MiPT.
Background: For longer than I can remember I was on anti-depressants and high blood pressure medication. The combination literally drove me crazy. My speech became broken and fragmented and my life was dominated by lustful impassivity.
Desired effects: To go deeper than ever before Intensity: Overwhelming Source: RC vendor Iยve been experimenting with the NBOMe class of phenethylamines the past few months, mostly with 25C-NBOMe but also with 25I and 25B laid out as bottlers.
Bluelight 2 threads 1 positive 1 neutral visit
I have a few mgs of this wonderful chem dissolved into a few ml of water. I decided I would put up this report as there appears to be literally no other accounts of it. The location I acquired it from suggested taking 2mg but I only took 1mg to be on the safe side.
Physical Background: I am overall physically healthy. -I have an ideal B.M.I. -I have stress related borderline hypertension. 130/80 mm/hg - 145/95 mm/hg -I am moderately physically active. I cycle one hour a day, walk one mile a day, and do very light strength training. -I have a balanced grain based diet.
Bluelight Reference Guide
Phenethylamines The Big & Dandy 25B-NBOMe (NBOMe-2C-B) Thread
Welcome to The Big & Dandy 25B-NBOMe Thread 2-(4-bromo-2,5-dimethoxyphenyl)-N-[(2-methoxyphenyl)methyl]ethanamine Reagent drug test info for NBOMe compounds External Links: Wikipedia Entry Isomer Design Entry 25X-NBOMe, 25X-NBOH SAFETY MESSAGE This is a newly discovered group of chemicals, with little history of human...
Read full thread on Bluelight โ
25B-NBOMe's nerd page
Pharmacology, chemical data, effect profiles, and more
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