Let me start off by saying that while this is a fantastic drug, I believe the possibilities for abuse are extremely high. My experience started off like any other day, my friend (N) told me that he got his hands on some morphine and wanted to know if I'd split 100mg with him.
Morphine
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
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
Aliases: M, Morpho, Monkey, Dreamer, Roxanol
Summary
Morphine is a potent naturally-occurring opioid analgesic extracted from the opium poppy, used for moderate to severe pain management. Overdose can result in fatal respiratory depression, especially when combined with other CNS depressants. Long-acting formulations exist for extended pain relief.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral BA 35%-40% | 10-15mg | 15-20mg | 20-30mg | 30mg+ |
| Intravenous BA ~100% | 3.33-5mg | 5-7.5mg | 7.5-10mg | 10mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 10-30 min | 20-40 min | 2-3 hrs | 1-2 hrs | 4-6 hrs |
| Intravenous | 0-1 min | 2-5 min | 1.5-2.5 hrs | 60-90 min | - |
| Intramuscular | 10-30 min | 20-40 min | 1-2 hrs | 2-4 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
10
mg
Morphine
≈
—
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
147 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 137 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Opioid
6.9
Strong+
7/10
Strong pain relief and itching/nausea with moderate euphoria and sedation
Euphoria / Warmth
×3
7
physical euphoria
cognitive euphoria
euphoria
mood lift
“Preparing your shot in a warm environment may assist as well as things like wearing a warm hat (beanie etc) and jumpers, tracksuits.”
“The guide on here says use 10 to 20 mls of warm water.”
Analgesia
×2
9
pain relief
analgesia
“– Morphine is a highly potent opiate analgesic psychoactive drug, is the principal active ingredient in Papaver somniferum (opium), is considered to be the prototypical opioid.”
Sedation / Relaxation
×1
7
sedation
muscle relaxation
dream potentiation
“and i usually plug all of it except 30mgs, which i put up my nose*(even though the B/A isnt great), it just seems like having the powder in my nose satisfies the urgent need to get high and then a...”
Itching / Nausea
×1
8
nausea
constipation
dry mouth
“Withdrawals are like most other drugs of this class; nausea, tearing, yawning, chills, body aches, insomnia, loss of appetite, dysphoria and excessive sweating, etc lasting anywhere up to a week or...”
“What could be done to prevent a strong nausea/stomach cramping from taking a 30mg generic MS Contin as prescribed?”
User Experience
pain relief
“– Morphine is a highly potent opiate analgesic psychoactive drug, is the principal active ingredient in Papaver somniferum (opium), is considered to be the prototypical opioid.”
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
14d
Half tolerance
5d
Baseline
~35d
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.
Opioid tolerance builds rapidly to euphoric/sedative effects, more slowly to analgesia, and poorly to constipation. After cessation, appreciable tolerance decay typically takes several days, but returns to near‑baseline can require 1–2+ weeks depending on prior dose/duration; re‑initiation after a break must account for lost tolerance to avoid overdose. Opioid‑induced hyperalgesia (OIH) may coexist with tolerance and can present as worsening pain despite escalating doses.
Cross-Tolerances
Effects
Aggregated from 137 Erowid and 10 Bluelight experience reports
Positive Effects 28
Contentment
50.0%
82%
Euphoria
40.8%
91%
Sedation
30.0%
85%
Warmth
30.0%
88%
Anxiety Suppression
24.4%
85%
Empathy
23.4%
70%
Bliss
20.0%
92%
Thought Deceleration
20.0%
75%
Stimulation
19.0%
70%
Music Enhancement
16.1%
70%
Tactile Enhancement
15.7%
80%
Body High
15.0%
90%
Pain Relief
12.9%
85%
Visual Distortions
11.6%
85%
Focus Enhancement
10.9%
70%
Geometric Imagery
10.0%
85%
Insight
10.0%
90%
Revelatory Insight
10.0%
85%
Taste Distortion
10.0%
80%
Vivid Dreams
10.0%
80%
Adverse Effects 18
Nausea
29.2%
85%
Body Load
20.0%
82%
Confusion
11.7%
70%
Entity Imagery
10.0%
95%
Fear
10.0%
90%
Paranoia
10.0%
90%
Sadness
10.0%
85%
Depression
10.0%
90%
Guilt
10.0%
85%
Depersonalization
10.0%
80%
Identity Confusion
10.0%
85%
Vomiting
10.0%
90%
Insomnia
10.0%
80%
Auditory Effects
9.5%
90%
Pupil Dilation
9.5%
70%
Headache
8.0%
70%
Increased Heart Rate
4.4%
70%
Memory Suppression
4.4%
70%
Combinations
Cross-Check Morphine 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
The first time I had morphine was when I went to the emergency room for kidney stones. I was throwing up everywhere, in massive pain, and they gave me an IV injection of morphine.
intravenous morphine I have shot up some morphine intranvenously a couple of times. The morphine was MD surplus, and it's quite easy for me to obtain sterile needles and syringes.
I should start off by saying that Im a very experienced opiate user. Ive used almost every prescription painkiller under the sun, though as of late theyve been hard to come by. I also smoke pot a few times a week and have used stimulants like Adderall on and off over the years.
A Very Powerful Experience Some background information: I come from a relatively well-situated standard familiar background in Europe. I had the luck to study materials science at a very reputated university in Europe and graduated last year.
I have read very little first-hand accounts of IV use of oral preparations of Morphine Sulfate. Partially, I think it is due to the scarcity of 30mL vials of Oral Morphine. I figured I would write my experience to add to the knowledge of others. Personal Info: 32 year old white male, 6ft, 155lbs.
Working in a veterinary hospital and having friends that work at people hospitals allows for some interesting experiences. There are times when unusual medications come our way, and without causing harm to others (we don't steal medicine from patients) we can experiment with different classes of drugs.
[Erowid Note: Because opiate use can lead to significant tolerance (requiring higher doses for the same effects), the dose used by a first time user is significantly smaller than that used by a regular user. It can be extremely dangerous to choose ones dose on the basis of the amount taken by someone else.
Bluelight 6 threads 4 neutral 2 cautionary visit
Experience includes: Vicodin, Codeine and Percocet I am 140 lbs, male and have not experienced Opiates in well over 6 months so I have zero tolerance at this point in time. My four friends all decided the superbowl would be an excellent occasion to trip due to the fact that we had no parental supervision.
So, about 2 weeks ago I got my hands on 2 30 mg Actavis Sustained Release Morphine pills from a friend of mine. Now keep in mind I have no opioid/opiate tolerance(I did 15 mg Lortab approximately 1 week before this.), so at the time I didn't realize that taking 60 mg of morphine was kind of a higher starting dose for s...
EDIT: Sorry about the title, didn't read the guidelines in time. Just last night I discovered in the depths of my parent's med cabinet a bottle of 10mg/5ml liquid morphine sulfate, which once upon a time belonged to my grandfather who sadly passed six months ago.
Good evening BLerz! Trip report numero uno for me! Huzzah! I did a favour for a friend and in return scored myself a hefty stash of 50mg Kapanol capsules. Decided to IV one, so here's my recollection Me- I've been a drug user for 10 years now, I'm addicted to speed and IV approximately 4-5grams a week, dependant on fun...
Previous opioid use: Codeine, propoxyphene, and hydrocodone, both alone and in combinations of all 3 that contained up to the equivalent of ~150mg codeine + sometimes pseudoephedrine and amantadine(which had been in the same bag and I assumed it was an opioid).
So I've done my share of opiates, I don't do them a lot or enough to have a tolerance, but I've tried a lot and I've experienced morphine on one other occassion besides this. Some was had and this is what transpired.
Pill Identifiers
7
known pill identifiers on record — view imprints, colors, shapes, and images
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Morphine's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
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