The healthcare provider prescribes erythromycin suspension 250 mg PO every 6 hours for a child with streptococcal pharyngitis. The drug is available in a suspension labeled, *200 mg/5 mL" How many mL should the nurse administer? (Enter numeric value only if rounding is required. round to the nearest hundredth.)
The Correct Answer is ["6.25"]
Given:
Ordered dose of erythromycin: 250 mg
Concentration of erythromycin suspension: 200 mg/5 mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
250 mg / Volume = 200 mg/5 mL
Step 3: Solve for the unknown volume:
Volume = 250 mg / (200 mg/5 mL)
Volume = 250 mg x (5 mL / 200 mg)
Volume = 6.25 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["4"]
Explanation
Given:
Ordered dose of Cefixime: 80 mg
Concentration of Cefixime suspension: 100 mg per 5 mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
80 mg / Volume = 100 mg/5 mL
Step 3: Solve for the unknown volume:
Volume = 80 mg / (100 mg/5 mL)
Volume = 80 mg x (5 mL / 100 mg)
Volume = 4 mL
Correct Answer is ["4"]
Explanation
Given:
Ordered dose of amoxicillin/clavulanate: 2 g amoxicillin + 125 mg clavulanate every 12 hours
Available tablets: 1000 mg amoxicillin + 62.5 mg clavulanate extended-release tablets
Step 1: Determine the total daily dose of amoxicillin/clavulanate:
Since the medication is given every 12 hours, there are 2 administrations per day.
Total daily dose (amoxicillin) = Dose per administration (amoxicillin) x Number of administrations per day
Total daily dose (amoxicillin) = 2 g/dose x 2 doses/day
Total daily dose (amoxicillin) = 4 g/day = 4000 mg/day
Total daily dose (clavulanate) = Dose per administration (clavulanate) x Number of administrations per day
Total daily dose (clavulanate) = 125 mg/dose x 2 doses/day
Total daily dose (clavulanate) = 250 mg/day
Step 2: Calculate the number of tablets required per day:
Number of tablets/day = Total daily dose (amoxicillin) / Strength of amoxicillin per tablet
Number of tablets/day = 4000 mg/day / 1000 mg/tablet
Number of tablets/day = 4 tablets/day
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