Amoxicillin 500 mg is ordered for a patient with a sinus infection. Amoxicillin oral suspension 200 mg per 5 mL is available.
How many mL should the nurse administer?
5.5 mL
10.5 mL
12.5 mL
15.5 mL
The Correct Answer is C
The nurse should administer 12.5 mL of amoxicillin oral suspension.
This answer is correct because it is based on a simple ratio and proportion calculation. The nurse can set up a proportion as follows:
200 mg / 5 mL = 500 mg / x mL
Cross-multiplying and solving for x gives:
x = 12.5 mL
Therefore, the nurse should administer 12.5 mL of amoxicillin oral suspension to deliver 500 mg of the medication to the patient.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
This instruction should be given to the patient for the effective management of asthma because the patient is taking an overdose of ipratropium, which may cause serious side effects such as dry mouth, blurred vision, urinary retention, or increased heart rate. The recommended dosage of ipratropium for adults with acute asthma is 0.5 mg (500 mcg) every 20 minutes for three doses, followed by 0.5 mg every two to four hours as needed³. The patient's prescribed dose is 5 mg/kg, which means 300 mg/day for a 60 kg patient. This is 10 times the maximum daily dose of 2 mg (2000 mcg) for ipratropium⁴. Therefore, the patient should halve the dose of medication to 150 mg/day, which is still higher than the usual dosage, but within the range that can be given under medical supervision.
The other options are not appropriate instructions because:
a) Continuing the same dose of medication may worsen the patient's condition and increase the risk of adverse reactions.
b) Changing to alternative medication may not be necessary or effective, as ipratropium is a commonly used bronchodilator for asthma that works by relaxing the airway muscles and improving airflow⁵. The patient may benefit from adjusting the dose or adding other medications, such as corticosteroids or beta-agonists, depending on the severity and frequency of symptoms.
c) Doubling the dose of medication may be dangerous and potentially fatal, as it may cause severe anticholinergic effects, such as dry mouth, blurred vision, urinary retention, increased heart rate, confusion, or coma.
Correct Answer is C
Explanation
This answer is correct because BSA is the most accurate method for calculating the child's dose from the adult dose¹². BSA takes into account the child's weight and height, and reflects the physiological function and organ growth of the child beter than weight alone¹. BSA can be calculated using a nomogram or a formula based on the child's weight and height¹. The child's dose can then be calculated by multiplying the adult dose by the ratio of the child's BSA to the average adult BSA (1.73 m2)¹. For example:
Child dose by BSA = (mg/day) = Adult Dose in mg/day x BSA in m2 / 1.73
OR
Child dose by BSA = (mg/day) = Adult Dose in mg/m2 x BSA in m2
The other options are not correct because they are not accurate methods for calculating the child's dose from the adult dose. Actual body weight and ideal body weight may not account for individual variations in pharmacokinetics, pharmacodynamics, or clinical response. Actual body height is not a reliable indicator of drug dosage, as it does not reflect the body mass or organ function of the child.
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