USA - NAPLEX EXAM ( SAMPLE MCQ - CALCULATIONS )

1. How much Lidocaine is required to prepare 1 : 1000, 30 cc of solution of Lidocaine?

a. 10 mg
b. 0.03 mg
c. 30 mg
d. 300 mg

 2. How many cc of 75 % alcohol should mix with 10 % of 1000cc alcohol to prepare 30% of 500cc alcohol solution?

a. 346.16 cc
b. 234.43 cc
c. 153.84 cc
d. 121.12 cc

3. If 60 gm of 1% hydrocortisone is mixed with 80 gm of 2.5% of hydrocortisone, what is the % of hydrocortisone in final mixture?

a. 2.2 % w/w
b. 1.85 % w/w
c. 0.25 % w/w
d. 1.75 % w/w

4. If 1000 tablets of Risperdal 1 mg cost $ 2250 and % mark up on prescription is 20, what would be the retail price of 30 tablets?

a. $ 150
b. $ 17
c. $ 500
d. $ 81

5. If the ratio of ionized to unionized species of drug is 103 and PKa = 2.2, what is the PH of the solution?

a. 2.2
b. 0.8
c. 5.2
d. 3.0

 6. If dropper is calibrated to deliver 325 mg of iron sulfate in 0.6 cc and adult dose of drug is 325 mg , what is the dose of a drug in cc for a 15 months-old infant?

a. 1.2 cc
b. 0.3 cc
c. 0.06 cc
d. 0.01 cc

 7. If the dose of a drug is 10 mg/kg/day, how many 250 mg/100cc ready infusion-bags require to fill above order? Patient's weight is 156 lbs.

a. 1 bag
b. 2 bags
c. 3 bags
d. 5 bags

 8. How much of atropine is required to prepare 240cc in such way that when 1 teaspoonful of the solution is diluted to 1 pint gives 1 in 500 solution?

a. 2.25 gm
b. 46.08 gm
c. 35.15 gm
d. 25.35 gm

 9. How much sodium bicarbonate powder is required to prepare 240cc of 0.10 N solution of sodium bicarbonate?

a. 1.35 gm
b. 3.25 gm
c. 4.81 gm
d. 2.016 gm

10. How many meq of Na+ are present in 0.9% 250cc normal saline solution? [Na+ = 23, Cl- = 35.5] 　

a. 23.12 meq
b. 15.17 meq
c. 53.15 meq
d. 38.46 meq

ANSWERS

　

1-c

2-c
3-b
4-d
5-c
6-c
7-c
8-b
9-d

10-d