If symptoms persist or recur after the initial treatment, repeat the antidote at one half the original dose one hour after the original administration. Monitor methemoglobin levels when practical in every patient treated with the intravenous antidote. The above sodium nitrite injection is about one-third the lethal dose, so care should be taken to avoid excessive use. It is NOT essential that full quantities of antidote be given just because treatment was started. Should injection be stopped for any reason, keep track of the amount administered in case treatment needs to be restarted.
Heating can release vapors which can be ignited.
Extinguishing Media Water Spray, Foam, Dry Chemical, CO2. Fire Fighting Instructions Keep personnel removed and upwind of fire. Wear self-contained breathing apparatus. Wear full protective equipment. Initial Containment Remove source of heat, sparks, flame, impact, friction or electricity.