They might have consumed cyanide. The pit of Apricot contains cyanide. Cyanide acts by inhibiting the enzyme cytochrome c oxidase of the electron transport chain which prevents the cell from producing ATP which is important for aerobic respiration of cells. Hydroxocobalamin, Sodium thiosulfate, Sodium nitrite are the common antedotes used in cyanide poisoning Solution They might have consumed cyanide. The pit of Apricot contains cyanide. Cyanide acts by inhibiting the enzyme cytochrome c oxidase of the electron transport chain which prevents the cell from producing ATP which is important for aerobic respiration of cells. Hydroxocobalamin, Sodium thiosulfate, Sodium nitrite are the common antedotes used in cyanide poisoning.