This product is a snake venom found in Crotalus durrisus terrificus including several toxins that cause myalgia, muscle weakness, and rhabdomyolysis. Crotoxin acts on N-type and P/Q-type Ca2+ channels to induce glutamate release and crotamine induces acetylcholine (ACh) and DA release. Crotoxin also potentiates activity at L-type Ca2+ channels. Gyrotoxin is a serine protease with thrombin-like activity. Together, these toxins may induce paralysis, acting as a neuromuscular junction (NMJ) blocker.