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

1   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 A 1,2,3 B 1,2 C 2,3 D 1 only E 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 75ml   Answer 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

Vishal Mistry says "I love you Sean". X

Instead of wrecking your brains and getting paid peanuts for being a pharmacist, you should become a pharm tech. gets paid about the same as a pharmacist with no responsibilty, no university education, no need to be able to solve the above questions. lovely life !!!

OMG...im seeing this so late...but the answer SHOULD be 1.25ml (as calculated) for double strength chloroform....

for 20ml water we need 1ml conc. chloroform to make double strength, so for 25ml double strength (required for formula) we will need 1.25ml........

20----1
25---- 1/20 x 25 = 1.25ml