Definition Mechanism of Action of Sodium Nitroprusside: After parenteral injection, sodium nitroprusside enters red blood cells, where it receives an electron from the iron (Fe2+) of oxyhemoglobin. This nonenzymatic electron transfer results in an unstable nitroprusside radical and methemoglobin (Hgb Fe3+). The former moiety spontaneously decomposes into five cyanide ions and the active nitroso (NO) […]