LSD vs 1P-LSD
LSD (Acid)
Psychedelics
VS
C₂₃H₂₉N₃O₂
1P-LSD (and analogs: 1cP, 1V, ALD-52)
Psychedelics
1P-LSD is a 'research chemical' prodrug of LSD — LSD with a propionyl group attached. It was sold in gray-market shops for years with one big question attached: does the body strip off the group and turn it into plain LSD? The evidence now says yes, almost completely.
LSD vs 1P-LSD — side by side
| LSD | 1P-LSD | |
|---|---|---|
| What it is | LSD-25 — the classic, illegal since 1968 | 1-propionyl-LSD — a legal-status workaround molecule |
| How it works | Active as-is | Prodrug — converts to LSD in the body (confirmed by 2020 analytical studies) |
| Effects | 8–12 h psychedelic | Effectively identical, onset slightly slower |
| Availability | Black market — blotter of unknown dose/purity | Gray market — sold with labeled doses and lab testing |
| Legal history | Schedule I (US) | Not explicitly scheduled until 2021+ in several countries; DEA prosecuted analog theory |
| Price | ~$5–15 per tab street | ~$5–10 per tab gray market (when available) |
| Current status | The original | Effectively discontinued as vendors lost legal cover |
The verdict
1P-LSD answered its own question: once ingested, it is LSD. The comparison is therefore mostly about markets, not molecules — 1P existed to give buyers labeled doses from accountable vendors instead of mystery street blotter. Both carry the same psychological risks and the same total lack of physical toxicity. As of the mid-2020s, most gray-market vendors have withdrawn 1P under legal pressure, and the classic debate has gone quiet.
?Frequently asked questions
Does 1P-LSD feel different from LSD?
If it does, most users can't tell. The prodrug conversion adds perhaps 15–30 minutes to the come-up — the rest of the 8–12 hour experience is LSD.
Why did people buy 1P-LSD instead of LSD?
Legal exposure for buyers and dose transparency. A labeled 100 µg tab from a lab-tested vendor beats a street tab of unknown strength.