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 ["400"]
Explanation
Given:
Vial strength: Cefazolin 1 gram (1000 mg)
Volume of diluent: 2 mL sterile water
Total volume after reconstitution: 2.5 mL
Step 1: Calculate the concentration of Cefazolin in the reconstituted solution:
Concentration (mg/mL) = Total amount of Cefazolin (mg) / Total volume of solution (mL)
Concentration (mg/mL) = 1000 mg / 2.5 mL
Concentration (mg/mL) = 400 mg/mL
Correct Answer is ["8"]
Explanation
Given:
Strength of each tablet: 625 mg
Maximum daily dosage: 5 grams (5000 mg)
Step 1: Calculate the number of tablets:
Number of tablets = Maximum daily dosage (mg) / Strength per tablet (mg/tablet)
Number of tablets = 5000 mg / 625 mg/tablet
Number of tablets = 8 tablets
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