1D-LSD
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 30 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
- dose ladder unverifiable and undisclosed — capped
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 30 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
- dose ladder unverifiable and undisclosed — capped
Aliases: Syn-l-229
Summary
1D-LSD is a prodrug of LSD with a 1,2-dimethylcyclobutane-1-carbonyl group at the N1 position. User reports suggest it is approximately 15-25% less potent by weight than LSD-25, though this varies between individuals and batches. Some blotters sold as 1D-LSD have been found to contain 1T-LSD (1-thienoyl-LSD) instead; reagent tests confirm lysergamide presence but cannot distinguish between analogues.
Perspectives
“It bore all the hallmarks of a lysergamide- patterned intentional visuals, teal-pink color schemes, a long duration with a drawn out euphoric stimulating afterglow, analytical, sentimental, profound and joyous headspace. This is certainly a compound that offers a worthwhile experience.”
Dose Information
No curated dose ladder is available for this substance. The figures below are drawn from SubstanceIndex (DoseWiki) as a fallback — often a conservative threshold only. Treat them as approximate and cross-reference before use.
| ROA | Light | Common | Strong |
|---|---|---|---|
| Oral | 25-75µg | 75-150µg | 150µg+ |
Sources
Oral
Dose ladder — dose.wikiOnset, Duration & After-effects
| ROA | Onset | Peak | Total |
|---|---|---|---|
| Oral | 30-60 min | 4-6 hrs | 10-14 hrs |
Effect Profile
4 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Strong visuals with moderate body load, mild headspace
Tolerance
Tolerance Decay
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.
Effects
Aggregated from 4 Erowid experience reports
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, something witnessed, or "did not happen" count too). 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.
Effect glossary — · full glossary
Positive Effects 3
Adverse Effects 1
Combinations
Cross-Check 1D-LSD with another substanceHelpful Links
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track 1D-LSD there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:
1D-LSD Source: SubstanceSearch (substancesearch.com) Oral dose (µg): threshold 25 · light 25-75 · common 75-150 · strong 150+ Oral duration: onset 0.5-1h · peak 4-6h · total 10-14h 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 ~ 112.5 µg (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.
Report an issue or suggest an edit
Spotted incorrect or dangerous information, have a correction, a new study, or a useful addition for 1D-LSD? Let us know. Reports are reviewed by moderators — this is not posted publicly.