Pre-reg Q&As: calculation question - May 5

Try this tough multiple completion calculation question to boost your preparation ahead of the pre-registration exam.


Multiple Completion

Directions:  For the question below, ONE or MORE of the responses is (are) correct. Decide which of the responses is (are) correct. Then choose:

A if 1,2 and3 are correct

B if 1 and 2 only are correct

C if2 and 3 only are correct

D if 1 only is correct

E if 3 only is correct

Directions Summarised
1 only
3 only

You are working in a hospital pharmacy department. You receive the following prescription for a child: Thyroxine suspension 37.5 micrograms/ 5ml Dose: 5ml daily 20 days supply The formula sheet that you will work to reads as follows: Thyroxine 50 microgram tablets        sufficient quantity Compound Tragacanth Powder         10g Syrup                                                 10ml Double Strength Chloroform Water    25ml Purified Water                                     to 50ml You have in stock Concentrated Chloroform Water, but not Double Strength Chloroform Water.    Which of the following statements is/are correct? A.    The number of thyroxine 50 microgram tablets required is 15 B.     The volume of Concentrated Chloroform Water required is 0.625ml C.     The total volume of the suspension to be supplied is 2.5ml  


1. D

Rationale/calculation Total volume of suspension to be supplied = 20 x 5ml = 100ml, so C is incorrect Total number of tablets required = 37.5 x 20 = 15, so A is correct                                                             50 Volume of Concentrated Chloroform Water: Ratio of concentration of Concentrated Chloroform Water to Double Strength Chloroform Water = 1 in 20, therefore require: 25 = 1.25ml, so B is incorrect                                                                                                                                                                                                       20


Which of PSNC’s five commissioning targets is it most important for pharmacists to deliver?
An urgent medicines supply service
Becoming a first port of call for patients with symptoms
Supporting frail and older patients
Helping patients with asthma and simple hypertension to manage their own health
Helping patients with asthma and simple hypertension to manage their own health
Total votes: 138