I remember meeting my friend Josh. At the time, I was an aspiring recreational drug user - my group of friends and I would smoke marijuana on a daily basis, and additionally pounce on the opportunity of doing anything else that came our way (mostly LSD, mushrooms, ketamine, cocaine, and E).
Heroin
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 6 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 19 combo interactions documented
- PubChem toxicity data
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 6 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 19 combo interactions documented
- PubChem toxicity data
Aliases: H, Boy, Junk, Dope, Gear, diamorphine
Summary
Diacetylmorphine or morphine diacetate (also known as diamorphine and heroin as well as colloquially as H, dope, smack, junk, brown, boy, and others) is a semi-synthetic opioid substance of the morphinan class. It is a derivative of morphine, a natural product of the opium poppy (Papaver somniferum). Heroin is known for its highly addictive properties and it makes up a large portion of the illicit traffic in narcotics.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Intravenous | - | 5-8mg | 8-15mg | 15mg+ |
| Insufflated | 7.5-20mg | 20-35mg | 35-50mg | 50mg+ |
| Smoked | 5-15mg | 15-25mg | 25-50mg | 50mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Intravenous | 0-1 min | 1-2 min | 1-90 min | 1-3 hrs | 3-5 hrs |
| Insufflated | 2-10 min | 10-20 min | 30-90 min | 2-4 hrs | 3-5 hrs |
| Smoked | - | 1-3 min | 15-30 min | 2-3 hrs | - |
Opioid MME Calculator
⚠ Citation & Disclaimer:
Conversion factors sourced from the
NIH HEAL Initiative MME Calculator (Adams et al., PAIN 2025),
the CDC 2022 Clinical Practice Guideline for Prescribing Opioids for Pain,
and the MDCalc MME Calculator.
These are approximate equianalgesic ratios for educational reference only.
Individual responses vary significantly based on genetics, tolerance, cross-tolerance, and route of administration.
This is not medical advice. Do not use these conversions to adjust opioid dosing without professional medical guidance.
mg
6.7
mg
Heroin
≈
—
mg
Morphine
| Substance | Equivalent Dose | MME Factor |
|---|
⚠ Equianalgesic dose ratios are approximations and do not account for genetic factors, tolerance, incomplete cross-tolerance, or pharmacokinetic variations. Methadone conversion is especially variable at higher doses. Always consult a healthcare provider before making any changes to opioid therapy.
Effect Profile
470 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 377 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Opioid
8.6
Intense+
9/10
Strong euphoria, pain relief, and sedation with moderate itching/nausea
Euphoria / Warmth
×3
10
physical euphoria
cognitive euphoria
euphoria
warmth
mood lift
“It's a rush that's I've never experienced before in my life (unless I was on hallucinogens and thought I was in danger or something).”
“Like I said in the beginning, it's a misconception that smoking is less dangerous because of the theory that "youll pass out before you can OD." The truth is, respiratory depression can set in BEFORE...”
Analgesia
×2
9
pain relief
analgesia
Sedation / Relaxation
×1
9
sedation
muscle relaxation
dream potentiation
“It didn't last very long until I began nodding off, and had a similar experience to falling asleep, but the hypnogogic imagery was compleatly different than that of a normal night.”
“After the coke wears off, I start nodding off heavy.”
Itching / Nausea
×1
7
nausea
constipation
dry mouth
“I was on sick leave.”
“I never actually fell asleep, and instead just had mild greyscale visions dotted with the occasional minimalist color while feeling really good, but horribly itchy.”
User Experience
euphoria
“It's a rush that's I've never experienced before in my life (unless I was on hallucinogens and thought I was in danger or something).”
Based on reports from:
Tolerance
Build-up
develops within days of regular use; analgesic tolerance faster than respiratory depression tolerance
Reset
7–14 days for partial reset; full reset may take weeks — tolerance loss greatly increases overdose risk
Tolerance Decay
Full tolerance
7d
Half tolerance
7d
Baseline
~14d
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Clinical and community data indicate rapid tolerance accrual with daily use and partial decay within days of cessation; overdose risk is highest after breaks when prior doses are resumed. Values are approximate and vary by individual, dose, and duration of use. Data quality mixed (clinical inference and user reports).
Cross-Tolerances
Effects
Aggregated from 377 Erowid and 93 Bluelight experience reports
Positive Effects 62
Euphoria
46.8%
91%
Empathy
40.6%
82%
Anxiety Suppression
33.7%
79%
Sedation
32.1%
88%
Contentment
32.0%
86%
Stimulation
20.1%
82%
Tactile Enhancement
19.9%
88%
Body High
15.5%
89%
Vivid Dreams
14.0%
82%
Drowsiness
14.0%
86%
Music Enhancement
14.0%
90%
Tingling
12.0%
78%
Thought Deceleration
12.0%
78%
Heaviness
12.0%
87%
Numbness
12.0%
90%
Warmth
10.0%
90%
Sociability Enhancement
10.0%
82%
Focus Enhancement
9.0%
70%
Thought Acceleration
8.0%
79%
Joy
8.0%
85%
Adverse Effects 53
Nausea
31.1%
82%
Confusion
19.7%
85%
Body Load
18.0%
83%
Vomiting
18.0%
89%
Ataxia
14.0%
78%
Dizziness
10.0%
83%
Dysphoria
10.0%
87%
Fear
10.0%
81%
Auditory Effects
9.4%
78%
Sweating
8.9%
91%
Focus Suppression
8.0%
81%
Insomnia
6.0%
82%
Paranoia
6.0%
75%
Sadness
6.0%
77%
Double Vision
6.0%
83%
Tremor
6.0%
85%
Memory Suppression
5.6%
80%
Headache
4.9%
80%
Pupil Dilation
4.5%
70%
Increased Heart Rate
4.2%
70%
Combinations
Cross-Check Heroin 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 3 positive 3 neutral 2 cautionary visit
So over my now three years of proper drug taking I have encountered many highs, drugs that I love and disappointments. I have taken most of the normal drugs: Cannabis, Mushrooms, LSD, DMT, Salvia, 2c-b-i-e, MDMA, mda, amphetamine, 4-MMC, 4-MEC cocaine, ketamine, legals, plus was using fishscale cocaine almost daily f...
I came about drugs in the strangest of ways. I guess I used to think it would be unimaginable for me to even smoke pot. That was the 'big evil.' But now as I look back I believe it was inevitable. I love my mind. I love it so much. I love searching the depths of it.
[Erowid Note: The dose described in this report is very high, potentially beyond Erowid's 'heavy' range, and could pose serious health risks or result in unwanted, extreme effects.
A Year's Review Ive been using heroin for just under a year now; At first I was so cautious, putting it off for a while after first getting it, waiting for when I particularly needed a sedative - one night after going out drinking with some acid I first got it out, some nice pure white No 4 from SE Asia.
Greetings one and all. I suppose I'll start with the usual background... I'm a 20 year old male, in excellent health, no medical conditions, I am not on any medications.
BACKGROUND: I've tried most drugs, the majority of which occurred during my experimental teenager years: Alcohol, DXM, meth, cocaine, weed, mushrooms. By 18, I had been psychologically addicted to DXM for a year and a half, followed by a harsh meth addiction for the next two years.
I have always had an addictive personality. I started drinking and smoking pot when I was 11. Then I moved to coke, then acid, extacy, special K, then crack, then oxy's, then heroin. I never liked speed. I grew up in a small town in the Ozarks. I was raped in seventh grade.
Bluelight 6 threads 1 positive 4 neutral 1 cautionary visit
Falling in love - my first encounter with Heroin - 0.2 grams - first time I remember my first shot of Heroin like the first time I ever had sex, like most users it was an experience you will never forget and always will regret...
Heroin - The Ho Hum drug OK, so I've been having a bit of fun with the old chopping the nurofen +'s in half and scarfing down that codeine goodness, and I've decided that I might try heroin and see how I fare with that. I've IV'd speed a fair bit so that was going to be my method of administration.
This is going to be a hard story for me to write. Most of the time I have written reports about drug experiences in the hopes of sharing profound experiences. I hoped that my writings could teach others.
BACKGROUND INFO Stats: Female, 23, 100lbs, 5'2 Experience level: I've tried most drugs, I guess. In my teenage years I considered myself a tiny little psychonaut, and tried basically everything that came my way: salvia, shrooms, crystal, weed, alcohol, E, cocaine, DXM.
So, I was damn stupid enough to try some H again but in my defense i was on Kratom at the time. I recently had some good Kratom extract and when it ran out there was only one solution to the problem.
DISCLAIMER- this is not meant to incourage drug use selling or glamorize it or anything thing like that. Its is actually a warning as to the beginning of my life of ruin as i would call it so take it for what it is thank you James.. James..
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