ATI DOSAGES BY WEIGHT DOSAGE
CALCULATION TEST REVIEW STUDY SHEET
2026 ACCURATE RESPONSES FULL SOLUTION
◉ A nurse is preparing to administer phenytoin 5 mg/kg/day PO
divided equally every 12 hr for an infant who weighs 12 lb 4 oz. How
many mg should the nurse administer per dose?
(Round to the nearest whole number. Use a leading 0 if it applies.
Don't use a trailing zero.) Answer: 16 oz/lb x 4 oz = 0.25lb
12 lb + 0.25 lb = 12.25 lb
2.2 lb/kg x 12.25 lb = 5.568181 kg
5 mg/kg x 5.568181 kg = 27.840909 mg
27.840909 mg / 2(Q12H) = 13.920454 mg
ANS: 13.9 mg
◉ A nurse is preparing to administer erythromycin ethyl succinate
50 mg/kg/day PO divided in equal doses every 6 hr to a toddler who
, weighs 32 lb. Available is erythromycin ethylsuccinate suspension
200mg/5ml. How many ml should the nurse administer per dose?
(Round to the nearest whole number. Use a leading 0 if it applies.
Don't use a trailing zero.) Answer: 2.2 lb/kg x 32 lb = 14.545454 kg
50 mg/kg x 14.545454 kg = 727.272727 mg
727.272727 mg / 4 (Q6H) = 181.818181 mg
200 mg/5ml x 181.818181 mg = 4.545454 mL
ANS: 4.5 ml
◉ A nurse is preparing to administer gentamicin to a client who
weighs 165 lb. The medication reference recommends administering
2 mg/kg IM every 8 hr. How many mg should the nurse plan to
administer per dose?
(Round to the nearest whole number.) Answer: 2.2 lb/kg x 165 lb =
75 kg
2 mg/kg x 75 kg = 150 mg
ANS: 150 mg
CALCULATION TEST REVIEW STUDY SHEET
2026 ACCURATE RESPONSES FULL SOLUTION
◉ A nurse is preparing to administer phenytoin 5 mg/kg/day PO
divided equally every 12 hr for an infant who weighs 12 lb 4 oz. How
many mg should the nurse administer per dose?
(Round to the nearest whole number. Use a leading 0 if it applies.
Don't use a trailing zero.) Answer: 16 oz/lb x 4 oz = 0.25lb
12 lb + 0.25 lb = 12.25 lb
2.2 lb/kg x 12.25 lb = 5.568181 kg
5 mg/kg x 5.568181 kg = 27.840909 mg
27.840909 mg / 2(Q12H) = 13.920454 mg
ANS: 13.9 mg
◉ A nurse is preparing to administer erythromycin ethyl succinate
50 mg/kg/day PO divided in equal doses every 6 hr to a toddler who
, weighs 32 lb. Available is erythromycin ethylsuccinate suspension
200mg/5ml. How many ml should the nurse administer per dose?
(Round to the nearest whole number. Use a leading 0 if it applies.
Don't use a trailing zero.) Answer: 2.2 lb/kg x 32 lb = 14.545454 kg
50 mg/kg x 14.545454 kg = 727.272727 mg
727.272727 mg / 4 (Q6H) = 181.818181 mg
200 mg/5ml x 181.818181 mg = 4.545454 mL
ANS: 4.5 ml
◉ A nurse is preparing to administer gentamicin to a client who
weighs 165 lb. The medication reference recommends administering
2 mg/kg IM every 8 hr. How many mg should the nurse plan to
administer per dose?
(Round to the nearest whole number.) Answer: 2.2 lb/kg x 165 lb =
75 kg
2 mg/kg x 75 kg = 150 mg
ANS: 150 mg
