Child dose by young's rule

6. Patient-based Dose 6.1) Pediatric dose 6.1.2) Young�s rule

6.1.2.1) Child dose calculation Easy 1


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If an adult's dose for a particuler drug is 400 mg, what would be the dose for a 9 year old child.


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lb equals 171.43 mg kg

Here Adult dose = 400 mg
Age = 9 yr

Young’s rule, based on age:

Child dose ` =(AGE)/(AGE + 12) × ADULT \quad DOSE \quad (mg)`
`\quad\quad\quad\quad\quad\quad\quad\quad = (9)/(9 + 12) × 400 \quad mg = 171.43 \quad mg` Ans.