#. If spontaneous breathing remains, encourage amyl nitrite|
inhalation from the nasal airway tract.
|#. Until sodium nitrite is ready, repeat inhalation every 2 to 3 min.|
|Sodium nitrite||#. Dissolve 0.6 g sodium nitrite to 20 ml of distilled water for injection to make a 3% solution.|
|#. Intravenously administer 10 ml (for child, 0.12-0.33 ml/kg) of the 3% sodium nitrite solution over 20 min or longer.|
|#. Sodium nitrite is not on the market as a medicine, therefore, it requires preparation in each hospital using reagent sodium nitrite.|
|#. Sodium thiosulfate is not efficacious, though it is used to treat cyanogen poisoning. (sodium thiosulfate does not have any negative effect for treatment of H2S poisoning.)|