Amygdalin is hydrolysed by two enzymes (amygdalin hydrolase and prunasin hydrolase) most properly in crushed, moistened kernels, causing the formation of HCN and glucose An antidotal mix of inhaled amyl nitrate and intravenous sodium nitrite and sodium thiosulfate are sometimes indicated. The IPCS/CEC (1993) assessment of antidotes for cyanide poisoning https://cyanolab.net/about-us/