A client receives a prescription for tetracycline 500 mg by mouth every 12 h. The medication is available in 250 mg capsules. How many capsule(s) should the nurse administer each day? (Enter numerical value only.)
The Correct Answer is ["4"]
Ordered dose of tetracycline: 500 mg every 12 hours
Available tetracycline capsules: 250 mg/capsule
Step 1: Determine the total daily dose of tetracycline:
Since the medication is given every 12 hours, there are 2 administrations per day.
Total daily dose (mg) = Dose per administration (mg) x Number of administrations per day
Total daily dose (mg) = 500 mg/dose x 2 doses/day
Total daily dose (mg) = 1000 mg/day
Step 2: Calculate the number of capsules required per day:
Number of capsules/day = Total daily dose (mg) / Strength of each capsule (mg/capsule)
Number of capsules/day = 1000 mg/day / 250 mg/capsule
Number of capsules/day = 4 capsules/day
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.3"]
Explanation
Given:
Ordered dose of amoxicillin: 25 mg/kg/day
Child's weight: 18 pounds
Concentration of amoxicillin suspension: 400 mg/5 mL
Step 1: Convert child's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Child's weight in kg = 18 lbs x 0.453592 kg/lb = 8.164656 kg
Step 2: Calculate the total daily dose of amoxicillin:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Child's weight (kg)
Total daily dose (mg) = 25 mg/kg/day x 8.164656 kg
Total daily dose (mg) = 204.1164 mg/day
Step 3: Calculate the dose per administration:
Since the medication is given every 12 hours, there are 2 administrations per day.
Dose per administration (mg) = Total daily dose (mg) / Number of administrations per day
Dose per administration (mg) = 204.1164 mg/day / 2 administrations/day
Dose per administration (mg) = 102.0582 mg
Step 4: Calculate the volume to be administered per dose:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 102.0582 mg / (400 mg/5 mL)
Volume (mL) = 102.0582 mg x (5 mL / 400 mg)
Volume (mL) = 1.2757275 mL
Step 5: Round to the nearest tenth:
Volume (mL) ≈ 1.3 mL
Correct Answer is ["0.5"]
Explanation
Given:
Ordered dose of interferon beta-1b: 0.125 mg
Vial strength: 0.3 mg
Reconstitution volume: 1.2 mL
Step 1: Determine the concentration of the reconstituted solution:
Concentration (mg/mL) = Total amount of medication (mg) / Volume of solution (mL)
Concentration (mg/mL) = 0.3 mg / 1.2 mL
Concentration (mg/mL) = 0.25 mg/mL
Step 2: Calculate the volume to be administered:
Volume (mL) = Desired dose (mg) / Concentration (mg/mL)
Volume (mL) = 0.125 mg / 0.25 mg/mL
Volume (mL) = 0.5 mL
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