This document provides information on calculating oral and rectal drug dosages for pediatric patients. It discusses interpreting drug labels and identifying drug names, strengths, and expiration dates. It also describes different methods for calculating pediatric doses, including the body surface area method, Clark's rule, Young's rule, and Fried's rule. Sample calculations are shown for each method to demonstrate how to determine a safe drug dose for a child based on the average adult dose, the child's weight, age, and other factors. Safety is emphasized when administering medications to children.
DRUG DOSAGE CALCULATION IN PEDIATRICS BY MANISHA THAKURManisha Thakur
DRUG DOSAGE CALCULATION IN PEDIATRICS:
PEDIATRIC DOSAGE DIFFERENT FROM ADULTS
FORMULAS: YOUNG, CLARK, DILLING, FRIED RULES
BASED ON AGE, BASED ON BODY SURFACE AREA, WEIGHT
EXAMPLES.
DRUG DOSAGE CALCULATION
DAILY FLUID REQUIREMENT
CALCULATION OF DRIP RATE
INFUSION PUMP FLOW RATE CALCULATION.
Pediatric Drug calculations |drug calculation formulasNEHA MALIK
Most drugs in children are dosed according to body weight (mg/kg) or body surface area (BSA) (mg/m2). Care must be taken to properly convert body weight from pounds to kilograms (1 kg= 2.2 lb) before calculating doses based on body weight. Doses are often expressed as mg/kg/day or mg/kg/dose, therefore orders written "mg/kg/d," which is confusing, require further clarification from the prescriber.
DRUG DOSAGE CALCULATION IN PEDIATRICS BY MANISHA THAKURManisha Thakur
DRUG DOSAGE CALCULATION IN PEDIATRICS:
PEDIATRIC DOSAGE DIFFERENT FROM ADULTS
FORMULAS: YOUNG, CLARK, DILLING, FRIED RULES
BASED ON AGE, BASED ON BODY SURFACE AREA, WEIGHT
EXAMPLES.
DRUG DOSAGE CALCULATION
DAILY FLUID REQUIREMENT
CALCULATION OF DRIP RATE
INFUSION PUMP FLOW RATE CALCULATION.
Pediatric Drug calculations |drug calculation formulasNEHA MALIK
Most drugs in children are dosed according to body weight (mg/kg) or body surface area (BSA) (mg/m2). Care must be taken to properly convert body weight from pounds to kilograms (1 kg= 2.2 lb) before calculating doses based on body weight. Doses are often expressed as mg/kg/day or mg/kg/dose, therefore orders written "mg/kg/d," which is confusing, require further clarification from the prescriber.
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Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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3. A Glance at Oral Drugs
These substances which which are administered
orally can be in the form of tablet, capsule, or
liquid.
4. Interpreting Oral Drug Label
For you to administer an oral dosage safely, you
must make sure that it is the correct drug with
right dosage.
5. 1. Identifiy the Drug Name
Know the difference
between the brand name
and generic name.
The generic names are the
active ingredients in the
medicine.
6. Important:
Pay attention to the active, or generic name, since
too much of an active ingredient can be harmful if
you make than one product with the same active
ingredient without knowing it.
7. 2. See the Dosage Strength
After identifying the drug
name, look for the dose
strength on the label.
8. Important:
Pay attention to the labels of two some drugs
which may look exactly alike aside from that of the
dose strength.
9. 3. Check the Expiration Date
You also have to check
the expiry date. It is a
viral information which is
sometimes.
12. Rules in Calculating Drug Dosages
Remember the rules to accurately calculate dug dosages and eliminate errors as
well.
1. Use the correct units of measure to avoid errors in calculating doses
2. Start with the solution by considering that the product of the means is
equivalent to the product of the extremes.
3. Solve for the value of X.
4. Double check your work by completing the equation using ratios in
proportion.
13. Example 1:
How many ml of a medicine are in two bottle if
one bottle has 60 ml?
14. Step 1: Prepare the equation by using ratios in
proportion.
1 bottle: 60 ml:: 2 bottles : X
15. Step 2: Start with the solution by considering
that product of the means is equivalent to the
product of the extreme.
60 ml x 2 bottles = 1 bottles x X
16. 60 ml x 2 bottles = 1 bottle of x X
120 ml = 1X
Or
X = 120 ml
Therefore, thw 2 bottles contain 20 ml of medicine.
Step 3: Solve for the value of X. In the given
problem, the value of X refers to
17. Step 4: Double check your work by completing
the equation using ratios in proportion.
1 bottle :: 60 ml :: 2 bottles : 120 ml
18. Example 2:
How many mg of a drug are in 4 capsules if 3
capsules contain 1500 mg?
22. Let us compute…
125 mg x X (# of suppository needed) = 1 suppository x 250 mg
125 mg (X) = 1 x 250 mg
125 mg (X) = 250 mg
X = 250 mg/125 mg
X = 2 suppositories
The sum it up, we will have to give 2 suppositories to the
patients since 2 suppositories equal 250 mg.
23. Example 3:
A doctor asked the nurse to give the patient 20 mg
of suppository. The suppositories on the shelf show
10 mg each. How many pieces of suppository
should give to the patient?
24. Let us compute for X which is the number of
suppository needed
1 suppository : 10 mg :: X (# of suppository needed)
25. Let us compute for X which is the number of
suppository needed
10 mg x X = 1 suppository x 20 mg
10 mg (X) = 20 mg
X = 20 mg / 10 mg
X = 2 suppository
Since the patient needs 20 mg of suppository, we will give
him/her 2 suppositories with 10 mg each. To check, 2
suppositories multiplied to 10 mg will give us 20 mg of
suppository.
26. A GLANCE AT RECTAL DRUGS
Rectal drugs are
medications prepared
specifically for insertion
into the rectum.
27. Interpret Rectal Drug Labels
As we administer medicines to our patients, it is vital
to real drug labels at all times.
• identify the drug name/generic name
• check for the dose strength
• expiration date
28. Types of Rectal Drugs
1. Enema – the injection of liquid into rectum through the
anus for cleansing, for simulating evacuation of the bowels,
or the therapeutic or diagnostic purposes.
2. Suppository – a small piece of medicated substance, usually
conically, ovoid,, introduced into a body passage as the
rectum or vagina, where body heat causes it to melt.
29. Dosage Calculation for Rectal Drugs
Suppository is considered to be the most used form of
rectal medicine. By calculating the number of
suppositories we give to the patient, we will use the
ratios in preposition method.
30. Example 1:
Calculating for a suppository dosage supposing a patient needs 250 mg of
suppository and the package label says 125 mg.
Using ratios in proportion, we find the value of X (number of suppository
needed) and our equation will be written as follows:
1 suppository: 125 mg :: X (# of suppository needed) 250 mg
31. A GLANCE AT CALCULATING PEDIATRIC DOSAGES FOR ORAL DRUGS
In calculating drug dosages for pediatric
patients, we have to bear in mind that
children are completely from adults.
32. Administering Pediatric Oral Drugs
Infants and young children who can hardly take
tablets and capsules are given oral drugs in the form
of liquids.
33. Important:
Do not mix crushed tablet with breast milk and infant
formula because it may to feeling refusal in the
future.
34. Devices Used in Giving Out Pediatric Oral Drugs
• cup – can be used by bigger children
• dropper – usually used for infants
• syringe – usually for infant
• hollow-handle spoon – usually used for toddlers
35. Safety Key Points in Giving Medication to Children
• Check the child’s month to ensure that he has swallowed the oral
drugs.
• Carefully mix oral drugs that come in suspension form.
36. Tips in Calculating Safe Pediatric Drug Dosages
• Use a calculator in solving equations.
• Ask advice form a formulary or a consult a drug handbook to
verify a drug dose. I still in doubt, call a pharmacist.
• Keep a record of your patient’s weight in kilograms so you do not
have to estimate it or weigh him all the time.
37. Methods Used in Calculating Pediatric Doses
1. Body Surface Area (BFA) Method – also called dosage-per-
kilogram-of-weight method; considered to be the most accurate
and safest method in calculating pediatric doses
2. Clark’s Rule – uses child’s weight to calculate approximate
dosage
3. Young’s Rule – normally for children who are two years of age
or more
4. Fried’s Rule – normally for children who are two years of age or
more
38. Body Surface Area (BSA) Method
We will have to use the nomogram to
determine a child’s BSA then setup an
equation using formula.
39. Here is the formula:
Average adult dose (child’s BSA in 𝒎𝟐 ÷ average adult BSA) = Child’s dosage
in mg
Note: Average adult BSA = 1.78 𝒎𝟐
40. Sample:
We have to compute for a child’s dose who weighs 40 lbs. What us
the safe drug dose if the average is 500 mg. Use the nomograph,
the child’s BSA is 0.72 𝒎𝟐
.
41. Computation Based on BSA Method
500mg (0.72 𝒎𝟐
÷ 1.73 𝒎𝟐
) = child’s dose in mg
500mg (.42) = child’s dose in mg
500mg (.42) = 210 mg
child’s dose = 210 mg
46. Young’s Rule for Children from 1 to 12 years old
Young’s Rule uses age in years.
(which makes it easier to remember,
the word young refers to age.)
47. Here is the formula:
Adult dose [child’s age in year ÷ (child’s age in year
+12)] = Approximate child’s dose
48. Same Simple Sample:
We have to compute for a 2-year old child’s dose who
weighs 28 lbs. Wherein the adult dose is 500 mg. Note that
the weight has no bearing using Young’s Rule.
50. Fried’s Rule for Infant and Children up to 12 years old
Fried’s Rule uses age in months.
51. Here is the formula:
Adult dose (child’s age in month ÷ 150) = Approximate child’s
dose
52. Still the Same Simple Sample:
500mg [(2x12 months) ÷ 150] = approximate child’s dose
500mg (2 ÷ 150) = approximate child’s dose
500mg (.16) = approximate child’s dose 500 mg
(.16) = 80 mg
Approximate child’s dose = 80 mg
Important:
Every medical caregiver, including the medical assistant needs to
be familiar with these rules.
