ATI Dosage Calculation and Safe Medication Administration 3.0 - Dosages by Weight

ATI Dosage Calculation and Safe Medication Administration 3.0 - Dosages by Weight A nurse is preparing to administer erythromycin ethylsuccinate 50 mg/kg/day PO divided in equal doses every 6 hours to a toddler who weighs 32 pounds. Available is erythromycin ethylsuccinate suspension 200 mg/5 mL. How many mL should the nurse administer per dose? (Round to the nearest tenth.) - ~ANSWER 4.5 mL Rationale: 1. 32 lbs/2.2 = 14.545 kg 2. (50 mg/kg/day) x (14.545 kg) = 727.2727 mg/day 3. (727.2727 mg/day) / (4 doses/day) = 181.818 mg/dose 4. 200 mg/5 mL = 181.818 mg/x mL 5. 200x = 909.0909 6. x = 4.545 mL 7. x = 4.5 mL (rounded) A nurse is converting a toddler's weight from lbs to kg. If the toddler weighs 17 lb 9 oz, what is the toddler's weight in kg? (Round to the nearest whole number.) - ~ANSWER 8 kg Rationale: 1. 17 lb 9 oz = 17 + (9/16) lb = 17.5625 lb 2. 17.5625/2.2 = x 3. x = 7.98295 kg 4. x = 8 kg (rounded) A nurse is preparing to administer phenytoin 15 mg/kg/day PO divided in three equal doses to a client who weighs 120 lb. Available is phenytoin suspension 125 mg/5 mL. How many mL should the nurse administer per dose? (Round to the nearest tenth.) - ~ANSWER 10.9 mL Rationale: 1. 120/2.2 = 54.545 kg 2. (15 mg/kg/day) x (54.545 kg) = 818.1818 mg/day 3. (818.1818 mg/day) / (3 doses/day) = 272.727 mg/dose 4. 125 mg/5 mL = 272.727 mg/x mL 5. 125x = 1363.636 6. x = 10.909 mL 7. x = 10.9 mL