Chlorpromazine (Thorazine) 175 mg IM is ordered. Available: 25 mg/mL. How many mLs will you administer?
0.5 mL
7 ml
2 ml
17 ml
The Correct Answer is B
To calculate the dosage, we need to use the formula:
Dosage (mL) = Ordered dose (mg) / Available dose (mg/mL)
Plugging in the given values, we get:
Dosage (mL) = 175 mg / 25 mg/mL
Simplifying, we get:
Dosage (mL) = 7 mL
Therefore, the dosage is 7 mL.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Step 1: Identify the given information
- Ordered dose = 1.0 mg
- Available concentration = 0.4 mg per 1 mL
Step 2: Use the ratio and proportion method
Required dose ÷ Available concentration = Volume to administer
Step 3: Plug in the values
= (1.0 ÷ 0.4)
Step 4: Solve step by step
- 1.0 ÷ 0.4 = 2.5 mL
Step 5: Round to the nearest tenth
- 2.5 mL (already rounded)
Correct Answer is D
Explanation
To calculate the flow rate in drops per minute, we can use the following formula:
Drops per minute = (Flow rate in mL/hour x Drop factor) / 60
Given that we have an order of 1 L of 0.9% NS to infuse at 50 mL/hr and a drop factor of 15 gtt/mL, we can calculate the flow rate as follows:
Drops per minute = (50 x 15) / 60 = **12.5 gtt/min**
Therefore, the correct answer is **d) 15 gtt/min**.
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