Question

A certain antihistamine is often prescribed for allergies. A typical dose for a 100​-pound person is 25 mg every six hours. Complete parts​ (a) and​ (b) below. a. Following this​ dosage, how many 12.6 mg chewable tablets would be taken in a​ week? b. This antihistamine also comes in a liquid form with a concentration of 12.6 ​mg/9 mL. Following the prescribed​ dosage, how much liquid antihistamine should a 100​-pound person take in a​ week?

Answer 1

Part A

25mg q6h
= 2 tabs q6h
= 8 tabs daily
= 56 tabs weekly

Part B

From part A we know a person can take 56 tabs (56 x 12.5mg) per week. In liquid form, the single dose is contained in 9mL if solution. If you need 56 doses, you will need 56 x 9 = 504mL.