A nurse is preparing to administer amoxicillin 320 mg PO every 12 hr to an infant. The amount available is amoxicillin suspension 400 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["4"]
To determine the correct dosage, the nurse should use the formula: (desired dose / amount on hand) x volume = amount to administer. In this case, it would be (320 mg / 400 mg) x 5 mL. This simplifies to 0.8 x 5 mL, which equals 4 mL.
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Related Questions
Correct Answer is C
Explanation
A. Gastritis in the father is unrelated to rheumatic fever, which is linked to streptococcal infections, not gastrointestinal issues.
B. Chickenpox, caused by the varicella-zoster virus, is not related to rheumatic fever.
C. A sibling who had a sore throat 3 weeks ago is significant because rheumatic fever often follows an untreated or inadequately treated streptococcal throat infection. Recognizing a recent history of streptococcal infection is key to understanding the source of the child's rheumatic fever.
D. Fifth disease, caused by parvovirus B19, is also unrelated to rheumatic fever.
Correct Answer is ["5.6"]
Explanation
To calculate the dosage of amoxicillin for the toddler, first convert the weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The toddler weighs 33 lb, which is approximately 15 kg (33 ÷ 2.2). The prescribed dose is 30 mg/kg/day, so for a 15 kg toddler, the total daily dose is 450 mg (15 kg × 30 mg/kg). This total daily dose should be divided into two doses to be given every 12 hours, resulting in 225 mg per dose (450 mg ÷ 2). Now, using the concentration of the amoxicillin suspension available, which is 200 mg/5 mL, calculate the volume of suspension needed for each dose. For a dose of 225 mg, the volume required is 5.625 mL (225 mg × 5 mL / 200 mg). Rounded to the nearest tenth, the nurse should administer 5.6 mL for each dose.
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