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

29 combo interactions documented

toxicity data (PsychonautWiki, PubChem)

Aliases: H, Boy, Junk, Dope, Gear, diamorphine

Summary dose.wiki Erowid TripSit PsychonautWiki

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 PsychonautWiki

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

Sources

Intravenous

Dose ladder — dose.wiki, PsychonautWiki

Insufflated

Dose ladder — dose.wiki, PsychonautWiki

Smoked

Dose ladder — PsychonautWiki

Onset, Duration & After-effects dose.wiki TripSit PsychonautWiki

ROA	Onset	Comeup	Peak	Offset	After Effects	Total
Intravenous	0-1 min	1-2 min	1-90 min	1-3 hrs	1.5-3 hrs	3-5 hrs
Insufflated	2-10 min	10-20 min	30-90 min	2-4 hrs	1.5-3 hrs	3-5 hrs
Smoked	<1-2 min	1-3 min	15-30 min	2-3 hrs	10-30 min	2.27-3.58 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.

Convert from

Convert to

6.7 mg Heroin

≈

— mg Morphine

⚠ 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

343 reports

Scores (0–10) curated from multiple sources:

Effect keyword matching from PsychonautWiki catalog
Validated against 250 Erowid trip reports
Weighted by importance: core (×3), major (×2), minor (×1)

Full methodology

Opioid 8.6

Intense+ 9/10

Strong euphoria, pain relief, and sedation with moderate itching/nausea

Euphoria / Warmth ×3

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).”

aLinkToTheAss bluelight ↗

“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...”

sixpartseven bluelight ↗

Analgesia ×2

0/20

pain relief analgesia

Sedation / Relaxation ×1

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.”

aLinkToTheAss bluelight ↗

“After the coke wears off, I start nodding off heavy.”

dankhead88 bluelight ↗

⚠ Itching / Nausea ×1

nausea constipation dry mouth

“I was on sick leave.”

tubgirl.jpg bluelight ↗

“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.”

aLinkToTheAss bluelight ↗

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).” — aLinkToTheAss, bluelight ↗

Based on reports from:

Erowid Experience Reports PsychonautWiki Heroin The Drug Users Bible Heroin

Tolerance

Build-up develops within days of regular use; analgesic tolerance faster than respiratory depression tolerance

Reset Falls quickly once you stop, at a rate you can't judge. After any break, treat your tolerance as gone.

No tolerance chart. Our decay curves for opioids were estimates, and a curve can make tolerance look longer-lasting than it is, which is the dangerous direction.

Opioid tolerance drops fast when you stop, and even a few days off can be enough, so a dose that used to be normal can now stop your breathing. Overdose deaths rise sharply after prison, detox or leaving treatment, and tolerance also falls during a hospital stay. After any break, start with a much smaller amount, try a test dose first, don't use alone, and keep naloxone within reach. Alcohol, benzodiazepines, gabapentinoids and other sedatives make an opioid overdose much more likely.

Sources: FRANK: heroin · National Harm Reduction Coalition · WHO: opioid overdose · Merrall et al. 2010 · Binswanger et al. 2007 · Strang et al. 2003 · FDA 2019: gabapentinoids and breathing

Cross-Tolerances

Other μ‑opioid agonists (e.g., morphine, oxycodone, hydromorphone)

Effects Erowid Bluelight

Aggregated from 250 single-substance Erowid and 93 Bluelight experience reports (the Bluelight figures come from the 50 of them read for effects); 127 Erowid reports where another drug was taken too are left out

Each bar shows the share of analyzed reports whose text mentions that effect — a mention is not always a first-hand experience (fear of an effect or something witnessed can count). Mentions saying the effect did not happen are left out; that check reads keywords, so it can miss some. The shaded band on a bar, and the small range after its number, is the 95% interval: where the share could plausibly be with other reports of the same kind. Fewer reports, wider band. Tap or hover any number for details. The second value is the Bluelight extractor's per-effect confidence; a dash means the row is Erowid-derived, which has no confidence measurement.

Positive Effects 61

47.0% 91%

38.3% 82%

32.0% 86%

31.0% 88%

18.0% 89%

17.3% 82%

14.0% 82%

14.0% 86%

12.0% 78%

12.0% 87%

12.0% 90%

11.3% 90%

11.0% 88%

10.0% 90%

10.0% 82%

8.0% 79%

8.0% 85%

8.0% 86%

8.0% 80%

Show 41 more positive effects

8.0% 86%

7.0% 80%

6.0% 82%

6.0% 78%

5.7% 85%

5.0% 85%

4.0% 80%

4.0% 82%

4.0% 75%

4.0% 88%

4.0% 78%

3.7% 78%

2.4% –

2.0% 75%

2.0% 95%

2.0% 85%

2.0% 90%

2.0% 85%

2.0% 75%

2.0% 80%

2.0% 75%

2.0% 85%

2.0% 75%

2.0% 90%

2.0% 75%

2.0% 85%

2.0% 90%

2.0% 85%

2.0% 80%

2.0% 90%

2.0% 85%

Adverse Effects 52

28.0% 82%

18.0% 83%

18.0% 89%

17.7% 85%

14.0% 78%

10.0% 83%

10.0% 87%

10.0% 81%

8.7% 91%

Auditory Effects 8.7% 78%

8.0% 81%

6.0% 82%

6.0% 75%

6.0% 77%

6.0% 83%

6.0% 85%

4.7% 80%

4.0% 82%

4.0% 90%

4.0% 88%

2.4% –

2.0% 90%

Show 29 more adverse effects

4.0% 82%

4.0% 80%

4.0% 70%

4.0% 88%

4.0% 80%

4.0% 82%

4.0% 80%

4.0% 92%

4.0% 88%

3.6% –

2.4% –

2.0% 80%

2.0% 85%

2.0% 75%

2.0% 80%

2.0% 70%

2.0% 85%

2.0% 90%

2.0% 85%

2.0% 90%

2.0% 85%

2.0% 80%

2.0% 90%

2.0% 85%

Also reported in combinations. In the 127 Heroin reports where another drug was taken too, 29 (22.8%) mention hospital, emergency services or an overdose, 4 (3.1%) a seizure and 2 (1.6%) psychosis. In the 250 single-substance reports: 18.4%, 2.4% and 0.8%. These are not in the figures above: they cannot be put down to Heroin alone, and a mention is not always something that happened to the writer.

Combinations

Cross-Check Heroin with another substance

Community Trip Reports

Anecdotal first-person accounts from Reddit, Erowid, Bluelight, and Dose.wiki. 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 8 reports 3 neutral 5 cautionary visit

Dope F(r)iend cautionary exp #39517

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).

Is This What People Call Fun neutral exp #106643

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...

Crossing Borders neutral exp #35928

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.

Free, Warm, Content, and Relaxed neutral exp #64944

[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 Chipper on the Edge of the Whirlpool cautionary exp #109204

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.

The Most Intense Nothingness cautionary exp #4671

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.

For Better or for Worse cautionary exp #94957

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.

My Boy Toy cautionary exp #37038

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 2 neutral 3 cautionary visit

Heroin 0 2 Grams First Time My First Encounter With Heroin Falling In Love neutral

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 Semi Experienced The Ho Hum Drug positive

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.

Heroin Experienced The Untimely Death Of Matt Himself cautionary

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.

Heroin 50cc Novice From A Point To Hell cautionary

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.

Heroin 3 Time Newb Withdrawals Are Flawed cautionary

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.

Heroin Inexperienced A Day In The Life Of A Future Junkie neutral

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..

Heroin's nerd page Pharmacology, chemical data, effect profiles, and more

→

Helpful Links

💊 Pill Identifier 📘 Experience Reports 📖 dose.wiki 📖 PsychonautWiki 📖 The Drug Users Bible

Import into PsychonautWiki Journal

The PsychonautWiki Journal app includes Heroin, but its built-in data can be thinner than ours. Importing this file adds a separate "Heroin (Substance Search)" custom substance with our dose ranges and durations, so you can log against whichever you prefer. It leaves tolerance out on purpose, for the reason given under Tolerance above.

⬇ Download import file Import this file as custom substances and you get "Heroin (Substance Search)" with every route's full dose ladder and timeline, no typing. Works on iOS and Android (v15+); the format is confirmed by the app's developer.

Ranges are harm-reduction guidance, not a prescription.

Report an issue or suggest an edit

Spotted incorrect or dangerous information, have a correction, a new study, or a useful addition for Heroin? Let us know. Reports are reviewed by moderators — this is not posted publicly.

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 29 combo interactions documented toxicity data (PsychonautWiki, PubChem)

Summary dose.wiki Erowid TripSit PsychonautWiki

Dose Information PsychonautWiki

Intravenous

Insufflated

Smoked

Onset, Duration & After-effects dose.wiki TripSit PsychonautWiki

Opioid MME Calculator

Effect Profile

Tolerance

Cross-Tolerances

Effects Erowid Bluelight

Positive Effects 61

Adverse Effects 52

Combinations

Community Trip Reports

Helpful Links

Report an issue or suggest an edit

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

29 combo interactions documented

toxicity data (PsychonautWiki, PubChem)