The stock dose stipulates that there are 40 mg for every 10 ml of the Risperidone. Moreover, we are told that the patient requires 80 mg of this drug and we are to determine the corresponding volume that should be administered. In order to determine the volume, we use the following relation;
40 mg is equivalent to 10 ml
what about 80 mg?
40 mg = 10 ml
80 mg = ?
We cross multiply;
( 80* 10) / 40 = 800/40 = 20 ml
Thus, the required volume of the prescription is 20 ml
