2. What is POSOLOGY???
Posology :- Posology: (Derived from the greek word
Posos-how much, and logos- science) is the branch
of pharmacology dealing with doses.
3. FORMULA,S
1. Clark,s formula
C.D = weight in lbs × adult dose
150
2.Dilling,s formula (12-20 years)
C.D = age in years × adult dose
20
3. Freid,s formula (upto 24 months)
C.D = age in month × adult dose
150
4. 4.Young,s formula (1-12 years )
C.D = age in years × adult dose
age +12
5.Calculation based on body surface
C.D = body surface area of the child ×adult dose
1.73 sq.meter
5. 1.Calculate the dose for a child of 6 year old olanzapine when
the adult dose 150 mg.
Given
Age = 6 years
Adult dose = 150 mg
Youngs formula = age in years × adult dose
age +12
= 6 × 150
6+12
= 50 mg
`
6. 2.Calculate the dose of 5 year old using Dilling formula
when the adult dose 1000 mg.
Given
Age = 5 years
Adult dose = 1000
Dilling formula = age in years × adult dose
20
= 5 × 1000
20
= 250 mg
7. 3.Calculate the dose of 18 month child by fried,s
formula when adult dose is 500 mg
Given
Age in month = 18
Adult dose = 500 mg
Fried,s formula = age in month × adult dose
150
= 18 × 500
150
= 60 mg
8. 4.Calculate the dose of a child of 5 year old whose weight is
22 pound & adult dose is 600 mg.
Given
Age = 5 years
Weight of child = 22 pound
Adult dose = 600mg
Clark,s formula = wt.in lbs × adult dose
150
= 22 × 600
150
= 80 mg
