1 pound is equivalent to 0.45 kg. Therefore 40 pounds will be equivalent to 18.14 kg.
For a child weighing 1 kg. The dose is 50 mg/kg/day in four divided doses which is every 6 hours in a day.
Therefore for a child weighing 18.14 kg. The dose to be administered will therefore be 907 mg in four divided doses for a day which can also be interpreted as 226.75 mg every 6 hours for a day.
The primary function of the lungs involving the transfer of oxygen from inhaled air into the blood and the transfer of carbon dioxide from the blood into the exhaled air.
