The patient/client is to receive Keflex (cephalexin) 2 g, twice daily. The medication is available as Keflex (cephalexin) 500 mg per capsule. How many capsules would the patient/client receive at each dose?
A) 1
B) 2
C) 3
D) 4

Question

Quizplus · Accepted Answer

When solving any problem, first check that the order and supply are in the same weight measure. For this problem, an equivalent is necessary (1 g = 1000 mg) to change 2 g to 2000 mg (2 *1000). To convert 2 g to milligrams, move the decimal point three places to the right (2000 mg). Estimate the amount to give. Formula Method: 2000 mg/500 mg* 1 capsule = 2000/500 = 4 capsules. Proportion (Ratios): 1 capsule : 500 mg :: x capsules : 2000 mg; 500x = 2000/500 = 4 capsules. Proportion (Fractions): 1 tablet/500 mg = x tablets/2000 mg; 500x = 2000/500 = 4 capsules. Use a conversion factor for dimensional analysis. Dimensional Analysis: 1 capsule/500 mg * 2 g * 1000 mg/1 g = 1 capsule * 2 * 1000/500 * 1 = 2000/500 = 4 capsules.

The Patient/client Is to Receive Keflex (Cephalexin) 2 G, Twice