The patient/client is to receive theophylline elixir 120 mg po twice a day. The medication is available as theophylline elixir 80 mg per 15 mL. How many milliliters of medication would the patient/client receive?
A) 20
B) 22.5
C) 25
D) 27.5

Question

Quizplus · Accepted Answer

When solving any problem, first check that the order and the supply are in the same weight measure. For this problem, no equivalent is necessary. Estimate the amount to give. Formula Method: 120 mg/80 mg *15 mL = 1800/80 = 45/2 = 22.5 mL. Proportion (Ratios): 15 mL : 80 mg :: x mL : 120 mg; 80x = 1800/80 = 45/2 = 22.5 mL. Proportion (Fractions): 15 mL/80 mg = x mL/120 mg; 80x = 1800/80 = 45/2 = 22.5 mL. Dimensional Analysis: 15 mL/80 mg *120 mg = 15 mL *120/80 = 1800/80 = 45/2 = 22.5 mL. For liquids, the four calculation methods are set up the same as for oral solids, except the supply includes a liquid measurement.

The Patient/client Is to Receive Theophylline Elixir 120 Mg Po