Catalyzes the hydrolysis of phosphatidylcholine with phospholipase A1 activity (By similarity). Shows potent hemolytic activity that is responsible for its lethal effect (PubMed:26603193). In vivo, induces local inflammatory effects (PubMed:7687388). a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 2-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) Local inflammatory effects are inhibited by antiserotonin drugs (cyproheptadine and methysergide), indomethacin, betamethasone, and antihistamine (chlorpheniramine). Expressed by the venom gland. Belongs to the AB hydrolase superfamily. Lipase family. Nucleotide sequence indicated is deduced from the source 'expression system E.coli' written in PDB 4QNN file.