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The physician has ordered erythromycin 40 mg/kg/day po q6h for a child who weighs 33 pounds....

The physician has ordered erythromycin 40 mg/kg/day po q6h for a child who weighs 33 pounds. Refer to the label shown in the figure. How much will you administer per dose?

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Answer #1

Label & available dose of the medicine is not given in the question.

Hence we will take available form as;

Syp. Erythromycin 400mg/5ml.

What we have = 400mg/5ml

Doctor has ordered Erythromycin 40mg/kg/day PO Q6H

What we want = 40mg/kg

Weight of child = 33pounds

1 pound = 0.454kg

Therefore weight of child in kg = 33 × 0.454

weight of child = 14.9kg

​​​​​​hence, doctor's order = 40mg × 14.9kg

doctor's order = 596mg

The standard formula to calculate the Amount to be given per dose = WHAT WE WANT/ WHAT WE HAVE

medicine to be administered per dose = 596mg/400mg/5ml

= 596mg/400mg × 5ml

medicine to be administered per dose for the child = 7.4ml

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