Hydrogen cyanide

CAS RN: 74-90-8

ABC Reminders / Treatment


ABC Reminders

Quickly access airway patency. If trauma is suspected, maintain cervical immobilization manually and apply a cervical collar and a backboard when feasible. Ensure adequate respiration and pulse. Document oxygen saturation. Administer 100 % supplemental oxygen and establish intravenous access, if necessary. Place on a cardiac monitor.

Link to Primary and Secondary Survey

Patients who rapidly regain consciousness and who have no other signs or symptoms may not require antidotal treatment.

If the patient is symptomatic, immediately institute emergency life support measures, including the use of cyanide specific antidotes.

Advanced Treatment

In cases of respiratory compromise, secure airway and respiration via endotracheal intubation or laryngeal mask airway (LMA) (use Bag Valve Mask (BVM) if unable to secure airway).

Patients who are in shock or have seizures should be treated according to advanced life support (ALS) protocols. These patients, or those who have arrhythmias, may be seriously acidotic; consider giving, under medical supervision, 1 mEq/kg intravenous of sodium bicarbonate.

Link to Basic and Advanced Life Support


If clinically indicated, initiate the administration of cyanide specific antidotes.

Administer intravenous cyanide antidotes as soon as soon as IV access is established.

Link to antidote treatment in the Hot Zone

Find more information on this substance at: PubChem, PubMed