1Bz-LSD, also known as 1-benzoyl-LSD or as SYN-L-018, is a psychedelic drug of the lysergamide family related to lysergic acid diethylamide (LSD). It is thought to be a prodrug of LSD. The drug was patented by Lizard Labs in 2024. Subsequently, it was encountered online as a novel designer drug in July 2024. 1Bz-LSD has been sold in the form of blotter tabs and microdots containing 10üg and 200üg doses per unit. 1Bz-LSD is not an explicitly controlled substance in the United States or in Canada.