Question

1. The physician has ordered Lanoxin elixir 90 mcg p.o. daily. The available medication contains 0.05 mg/2 mL. How many mL will you administer?
2. The physician has ordered Tylenol 1000 mg p.o. Q 4 hr. for temperature higher than 101° F. The medication is supplied in 500mg tablets. How many tablets will the patient receive per dose? ­
3. Refer to question # 2 above. What is the maximum number of tablets the patient can receive in any 12-hour period?
4. The physician has ordered Synthroid 200 mcg p.o. QD. The medication label states 0.1 mg/tablet. How many tablets will you administer?
5. The physician has ordered KCL 40 mEq p.o. daily. The medication is supplied as 20mEq/10 mL. How many mL will you administer?
6. The physician has ordered Neupogen 690 mcg SQ QD. The medication is supplied as 300 mcg/mL. How many mL will you administer? ­
7. The physician has ordered amoxicillin 0.1 g p.o. Q8hr. Drug available is amoxicillin oral suspension, 250 mg/3mL. How many mL will the patient receive in 24 hours?
8. Order: Cefazolin (Ancef) 750 mg IM Q6hr.   Available: Ancef 1 g/3 mL sterile water. How many mL will you give per dose?
9. Order: meperidine (Demerol) 75 mg p.o. syrup every 3 hours prn pain.    Available: meperidine 50mg/3mL. How many mL will you give per dose?
10. Order: Lopressor (Metoprolol) 100 mg po, bid.   Available: Lopressor, 50 mg tablets.The client is going on a 1-week vacation & must have adequate medication to last him until he returns home. How many tablets will he need to have to cover the time of his vacation?

Answer 1

Question 1

available dose = 0.05 mg/2ml

ordered dose= 90 mcg (change the mcg to mg because it is the available dose is given in mg, so 1 mcg=1000 mg)

= 90/1000 = 0.09 mg

For calculation, the ml, use the formula,

(ordered dose/available doses) x ml

=(0.09/0.05) x 2 ml

= 1.8 x 2

=3.6 ml

So 3.6 ml will be administered.

Question 2

Ordered dose = 1000 mg

Available dose = 500mg/tablet

Use the formula,

=ordered dose / available dose

= 1000/500

= 2

So 2 tablets will be administered in single dose.

1000 mg is advised 4 hourly, in 12 hours 3 doses will be given. so a maximum of 6 tablets can be given for 12 hours.

Question 3

order dose = 200 mcg (change to mg) = 200/1000 = 0.2 mg

Available dose = 0.1 mg /tablet

Calculate the number of tablet by using the formula,

= ordered dose/ available dose

= 0.2/0.1

=2

So 2 tablets will be administered.

Question 4

Answer: Available dose = 20 mEq/10 ml

ordered dose = 40 meq

use the formula,

required ml = (ordered dose/available dose) x available ml

=(40/20) x 10

=20

Therefore, 20 ml will be administered.

Question 5

Answer;

available dose = 300 mcg/ml (available ml is 1 ml)

ordered dose = 690 mcg

Use the formula,

Required ml= (Ordered dose /available dose) x available ml = (690/300) x 1= 2.3

2.3 ml od medication will be administered.

Question 6

First, we need to calculate for ml per dose

ordered dose= 0.1 g ( change it to mg as the available dose is given in mg) =0.1x1000= 100 mg

available dose = 250 mg/ 2 ml ( available ml is 2 ml)

use the formula

Required ml = (ordered dose/available dose) x available ml

= (100/250) x 3ml = 1.2 ml

1.2 ml will be administered per dose. As it is advised Q8h, in 24 hours it will be given 3 times a day, (1.2x 3) = 3.6 ml. So, 3.6 ml of injection will be given in 24 hours.

question 7

Answer: available dose = 1g/3ml

Ordered dose= 750 mg ( change it to g as the available dose is in g) = 750/1000 = 0.75 g

use the formula,

required ml= (ordered dose/available dose) x available ml = (0.75/1) x 3 = 2.25 ml or approximaltely 2.3 ml

2.3 ml will be administered perdose.

Question 8

available dose= 50mg/3ml

ordered dose= 75 mg

By using the same formula, in the above question

(75/50) x 3 = 4.5 ml

4.5 ml will be administered per dose.

Note: the unit for the available dose and ordered dose should be sam while calculating.