Calculate the following dosage using ratio and proportions method. Round answers to the nearest tenth. Order: Tegretol 200 mg p.o.t.i.d.
Available
3 tabs
2 tabs
1 1/2 tabs
4 tabs
The Correct Answer is B
Calculate the dosage using the ratio and proportion:
Given:
Order: 200 mg p.o. t.i.d.
Available: Tegretol 100 mg chewable tablets.
Step 1: Set up the proportion
Available dose (100 mg) : 1 tablet = Ordered dose (200 mg) : x tablets
Step 2: Solve for 𝑥
100 mg : 1 tab = 200 mg : 𝑥 tabs
𝑥 = 200/100 = 2 tablets
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
1. Convert patient weight from pounds to kilograms:
Patient weight (kg) = 152 lb x 0.453592 kg/lb = 68.94 kg
2. Calculate the desired dose in mcg/min:
Desired dose (mcg/min) = 5 mcg/kg/min x 68.94 kg = 344.7 mcg/min
3. Convert mcg/min to mg/min:
Desired dose (mg/min) = 344.7 mcg/min / 1000 mcg/mg = 0.3447 mg/min
4. Calculate the concentration of dobutamine in the solution:
Concentration (mg/mL) = 500 mg / 250 mL = 2 mg/mL
5. Calculate the flow rate in mL/min:
Flow rate (mL/min) = Desired dose (mg/min) / Concentration (mg/mL)
Flow rate (mL/min) = 0.3447 mg/min / 2 mg/mL = 0.17235 mL/min
6. Calculate the flow rate in mL/hr:
Flow rate (mL/hr) = 0.17235 mL/min x 60 min/hr = 10.341 mL/hr
7. Round to the nearest tenth:
Flow rate (mL/hr) = 10.3 mL/hr
Therefore, the correct answer is 10.4 mL/hr
Correct Answer is B
Explanation
Given:
Ordered dose of amoxicillin: 30 mg/kg/day divided every 12 hours
Toddler's weight: 33 lbs
Concentration of amoxicillin suspension: 200 mg/5 mL
Step 1: Convert the toddler's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Weight in kg = 33 lbs x 0.453592 kg/lb = 14.968 kg
Step 2: Calculate the total daily dose of amoxicillin:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Weight (kg)
Total daily dose (mg) = 30 mg/kg/day x 14.968 kg
Total daily dose (mg) = 449.04 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) = 449.04 mg/day / 2 administrations/day
Dose per administration (mg) = 224.52 mg
Step 4: Calculate the volume to be administered:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 224.52 mg / (200 mg/5 mL)
Volume (mL) = 224.52 mg x (5 mL / 200 mg)
Volume (mL) = 5.613 mL
Step 5: Round to the nearest tenth:
Volume (mL) ≈ 5.6 mL
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