I, along with a few friends, have sampled this compound, obtained from a trusted source. We didn't go about things scientifically, or even with the intent of sharing our experiences with others...We just wanted to get high.
AH-7921
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 29 combo interactions documented
- classified Research-chemical
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 29 combo interactions documented
- classified Research-chemical
Aliases: ah7921, AM-7921, am7921
Summary
Opioid analgesic that is selective for the ΞΌ-opioid receptor. It has around 80% the potency of Morphine when taken orally.
Dose Information
| ROA | Light | Common | Strong |
|---|---|---|---|
| Oral | 5-10mg | 10-25mg | 25mg+ |
Onset, Duration & After-effects
| ROA | Onset | Peak |
|---|---|---|
| Oral | 15-45 min | 6-8 hrs |
Effect Profile
5 reportsScores (0–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Opioid
6.3
Strong
6/10
Strong euphoria with moderate itching/nausea, mild pain relief, low sedation
Euphoria / Warmth
×3
10
physical euphoria
euphoria
cognitive euphoria
mood lift
Analgesia
×2
4
analgesia
Sedation / Relaxation
×1
3
sedation
Itching / Nausea
×1
7
nausea
constipation
dry mouth
Based on reports from:
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 Β· National Harm Reduction Coalition Β· WHO: opioid overdose Β· Merrall et al. 2010 Β· Binswanger et al. 2007 Β· Strang et al. 2003 Β· FDA 2019: gabapentinoids and breathing
Effects
Aggregated from 5 single-substance Erowid experience reports; 1 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.
Too few reports for bars: these effects come from 5 single-substance Erowid reports, and a bar is drawn only from 20 reports or more. With fewer, a percentage cannot tell a common effect from a rare one. Counts are shown instead. Why 20?
Effect glossary — · full glossary
Positive Effects 2
4 of 5
–
3 of 5
–
Adverse Effects 1
3 of 5
–
Combinations
Cross-Check AH-7921 with another substanceCommunity 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 5 reports 1 positive 2 neutral 2 cautionary visit
I (P) and a friend (B) have low tolerance to opiates, with previous experience using Oxycodone, Dihydrocodeine, Codeine and Fentanyl. Setting was a party with a small number of friends. We received 1 gram of AH-7921 (CAS number 41804-96-0) from a reputable european vendor.
I am recollecting this from a year-old memory so elements of timing may be foggy. To be clear I was not the subject of this experience. This experience took place during a 3.5 month long study abroad trip in a Chinese-speaking city (I do not speak more than a few words of Chinese).
Background: IΒm a research chemist Β been interested in opiates/opioids since college. I find they greatly improve my mood and relieve anxiety. IΒve been a steady user (almost daily) of codeine (oral, up to 200 mg at a time, 400 mg a day) for almost a year, although tolerance is catching up with me.
I received this from a reputable lab with all the independent lab testing done before any consuming was done. This is the base form and the HCL form will be tested in a few weeks. 10mg vaped (do not try putting base up your nose!) - Very relaxing and pleasant but nothing special.
Bluelight 3 threads 3 neutral visit
Just thought I'd write up a trip report since this chemical seems to be pretty rare. Hopefully someone will find it useful. BACKGROUND I was able to procure a couple grams of this rare material from a trusted friend and was stoked to try it.
Total doses: 160mg (in individual weighing 130lbs and 170mg in individual weighing 200lbs) I (P) and a friend (B) have low tolerance to opiates, with previous experience using Oxycodone, Dihydrocodeine, Codeine and Fentanyl. Setting was a party with a small number of friends.
AH-7921 - again, sorry for the coldness Iβve weighted 2 doses, 50mg and 50mg. One went up my bum, 5ml of water (everything dissolved great, unlike my previous sort, which was HCl salt by the way), very irritating and again - mind you, Iβm experienced, stuff doesnβt randomly irritate me down there so I know what Iβm tal...
AH-7921's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track AH-7921 there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:
Name
AH-7921
Unit
mg
Description
AH-7921 Source: SubstanceSearch (substancesearch.com) Oral dose (mg): light 5-10 Β· common 10-25 Β· strong 25+ Oral duration: onset 15-45m Β· peak 6-8h Β· after-effects 1-6h Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.
Tip: for quicker logging you can also add a Custom Unit in the app, e.g. common dose ~ 17.5 mg (Oral).
The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.
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