Drug calculation for nurses

Selamat kembali to my page. This time.. I will discuss about drug calculation in drug administration in tablet and fluid. Mari belajar bersama to updated our knowledge. In this website http://nursearegreat.com , they discuss that many nurses are weak with drugs calculation .So as a Malaysian nurses, I expect that we dont want to include in that group of nurses. So in this topic, we will discuss about it and let’s do some exercise.

Calculation of tablet administration

Formula

D (Desired dose)
H (Dose on hand)
V (Vehicle-tablet or liquid)
D
Hx V = Amount to Give
Example:1)  22mg milligrams of primaquine phosphate prescribed daily. On hand u have 7.5 miligrams tablet. How many tablet u need?

(22mg ÷ 7.5mg =2.93mg= 3 tablet)

2) 30 miligrams nifedipine is prescribed daily.On hand u have 2o miligrams tablet.How manyt ablet will u give?

(30mg÷20mg=1.5= 1 1/2 tablet)

Okay… Boleh kah anda selesaikan soalan yang lain.. Answer will be given later…
3) 1o milligrams isosorbide ntrate is priscribed for 3 hour. On hand u have 5 miligrams tablet. How many tablet do u need?
4) 12.5 miligrams of pericyazine is prescribed bd.On hand u have 2.5 miligrams tablet. How many tablet do u need?

5)9.5 miligrams of prazosin hydrochloride is priscribed bd. On hand u have 2 miligrams tablet. How many tablet do u need?

6)On hand u have 2 miligrams tablet. 2.5  miligrams of benztropine mesylate is prscribed. How many tablet do u need?

7) 17.5 miligram of enalapril is priscribed. On hand u have 10 miligram tablet. How many tablet do u need?

8.)0.4 grams of cimetidine is priscribed bd.On hand u have 800 miligrams tablet. How many tablet will u give?


Ok.. good… Now lets shift to anther formula
Calculation for fluid medication
Formula:   what do you want? X    What its in?   = DOSE
what you’ve got?
Example:-
1.Ordered:   Heparin 8000 units subcutaneous q12h
Available:   Heparin 10,000 units per ml
How much will you administer?
Formula:   8000 units X 1 ml = 0.8 ml
10,000 units

Ratio:  10,000 units : 1 ml = 8000 units : x
8000 units X 1 ml = 10,000 units x
8000 / 10,000       =  x
0.8 ml = x

Let’s start with exercise

1) 52.5 miligrams of pentazosine hydrocloide qid is prescribed.on hand u have 30 miligrams in 2 mililiters. How many will u administer?

2) 37.5 of fluphenazine 4 weekly is priscribed.On hand u have 50 miligrams in 2 mililiters. How many milliliter will u administer?

3)10 miligram of morphine tatrate 4 hourly is priscribed.On hand u have 400 miligrams in 5 mililiters. How many milliliter will u administer?


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