Question

Exercises: Dose Calculations

1. A doctor orders ½ ounce of an antacid after meals. How many tablespoons should you take in each dose?

2. If the dose of a drug is 500mg, in 50,000mg there are _______ doses.

3. A solution contains 0.50mg of an ingredient in every 1ml. How many doses are there in 120ml?

4. One 300mg cimetidine tablet equals _____g.

5. A ½ g phenobarbital tablet equals ______ mg

6. If the dose of a medicine is 1 ½ teaspoon, in 12oz there will be ____ doses.

7. The recommended dose of erythromycin for the treatment of ear infection is 50mg per 1kg per day, divided into doses every 6 hours. If the child weighs 45lbs, what is the daily dose?

8. A doctor's order requires 10mEq of an electrolyte. If we have available a vial with a concentration of 1.04mEq / ml. How many ml is needed to prepare the medical order?

9. The doctor orders the patient to take 1g of antibiotic every 8 hours for a week. There are only 250mg capsules in the pharmacy.

a. How many capsules will you take in one dose?

b. How many capsules will you take in a day?

c. What is the total number of capsules to complete the treatment?

10. The sulfisoxazole dose for infants older than 2 months and children is 60-75mg / kg. What will the usual dose be for a 36-pound child?

Answer 1

Answer of question 1 :-

ordered dose of medicine = 1/2 ounce

1/2 ounce = howmany tablespoon ?

1 ounce = 30ml

1/2(half) ounce =30/2 = 15ml

1 table spoon = 15ml

half(1/2) ounce of antacid is equal to 1 tablespoon

Answer of question 2:-

one dose of drug = 500mg

howmany dose( X) in 50,000 mg ?

1 dose =500

X dose = 50000

500/1=50000/X

X=50000 DIVIDED BY 500

X=50000/500 = 100

Answer is 50,000mg contains 100dose.

Answer of question 3:-

a solution contain ingredient  0.50mg/mL

howmany ingredients( X ) in 120mL ?

0.50MG =1 Ml

X MG =120mL

X = 120 x 0.50

X = 60 MG

Answer is 60 mg of ingredients in 120 mL of solution .

Answer of question 4:-

avaialble dose of cemetidine in milligram = 300

howmany grams( X ) in 300 milligrams ?

1gram =1000milligrams

X grams = 300 milligrams

X x 1000 = 1 x 300

1000X = 300

X = 300 DIVIDED BY 1000

X = 0 .3 GRAMS

Answer is 300mg cemetidine equal to 0.3g

Answer of question 5:-

1/2 g phenobarbital tablet = howmany ( X ) mg

1/2g = 0.5g

1g =1000mg

0.5g = X mg

X x 1 = 1000 x 0.5

X = 500

Answe is 1/2 g phenobital equal to 500mg

Answer of question 6:-

dose of medicine =1 1/2 ( one and half ) teaspoons

howmany ( X ) teaspoon in 12 OZ ?

1 teaspoon = 5 ml

1 oz ( ounce ) = 30ml

12 oz = 30 x 12 = 360

12 oz = 360ml

1teaspoon =5ml

X teaspoons = 360ml

X x 5 = 360 x 1

X = 360 /5

= 72

Answer is 72 teaspoon equal to 12oz of medication

Answer of question 7:-

ordered dose =50mg/kg/day

weight of client 45 lbs

1 lbs (pound) = 0.453 kg

weight in kilogram = 45 x 0.453

= 20.385 kg

dose of medication per day = 20.385 x 50

=1019.25 mg /day

answer is 1019.25mg of erythromycine needed for 45lbs bodyweight per day

Answer of question 8:-

ordered dose ( X ml ) = 10 mEq of electrolyte

available dose 1.04meq/ ml in a vial

X ml = 10 meq

1ml = 1.04 meq

X = 10/1.04

= 9.615 ML

Answer is 9.615 ml needed for preparation of medication

Answer of question 9:-

doctor's order 1gm medicine every 8 hours for 1 week

available dose 250mg

1g = 1000 mg

* number of capsule in one dose = 1000/250= 4 capsule

* number of capsule per day =4 x 3 ( every 8 hours) = 12 capsule

* total number of capsule for 1 week (7days)= 7 x 12 = 84 capsule

Answer of 10 :-

1 pound =0.453 kg

30 pound = 0.453 x 30 =13.59

13.59kg

1kg = 60 to 75 mg dose

FIND THE MEAN VALUE OF 60 -75 MG

(60+75) /2 = 135/2 = 67.5 MG

1KG BODY WEIGHT NEEDS 67.5 MG OF DOSE OF MEDICATION

13.59kg = X (DOSE OF MEDICATION )

X = 13.59 x 67.5

=917.32 MG

13.59 KG BODY WT NEEDS 917.32 MG OF DOSE OF MEDICATION