Scoulerine, also known as discretamine and aequaline, is an alkaloid found in the Opium poppy,[1] Croton flavens,[2] and certain plants in the Erythrina genus.[3] Studies show that scoulerine is an antagonist at the α2-adrenoceptor, α1D-adrenoceptor and 5-HT receptor.[4][5] It has also been found to be a GABAA receptor agonist.[2][6]