1cP-LSD
Chemical compound
From Wikipedia, the free encyclopedia
1cP-LSD, or 1-CPA-LSD, also known as 1-cyclopropanoyl-LSD or as Curie, is a psychedelic drug of the lysergamide family and an acylated derivative of lysergic acid diethylamide (LSD) which has been sold as a designer drug.[3][4][5][1] It is a prodrug of LSD.[3]
- AU: S9 (Prohibited substance)
- BR: Class F2 (Prohibited psychotropics)
- CA: Unscheduled.
- DE: NpSG (Industrial and scientific use only)
- UK: Under Psychoactive Substances Act
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| Other names | 1-CPA-LSD; 1-cyclopropanoyl-LSD; 1-(Cyclopropylmethanoyl)-LSD; 1cP; Curie |
| Routes of administration | Oral |
| Drug class | Serotonergic psychedelic; Hallucinogen |
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| Pharmacokinetic data | |
| Duration of action | 5–10 hours[1][2] |
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| Chemical and physical data | |
| Formula | C24H29N3O2 |
| Molar mass | 391.515 g·mol−1 |
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Use and effects
Interactions
Pharmacology
Pharmacodynamics
1cP-LSD is a prodrug of LSD.[3] It has been found to produce psychedelic-like effects, specifically the head-twitch response, in rodents with similar potency as 1P-LSD.[3]
Chemistry
Society and culture
Legal status

Canada
1cP-LSD is not a controlled substance in Canada as of 2025.[6]
Sweden
Sweden's public health agency suggested classifying 1cP-LSD as a dangerous substance on 18 December 2019 and later classified it as such on 22 April 2021.[7][8]
United States
1cP-LSD is not an explicitly controlled substance in the United States.[9] However, it could be considered a controlled substance under the Federal Analogue Act if intended for human consumption.