A nurse is preparing to administer haloperidol lactate 7 mg PO to a client who has psychosis.
Available is haloperidol lactate 2 mg/mL oral solution.
How many mL should the nurse plan to administer? (Round to the nearest tenth.
Use a leading zero if it applies.
The Correct Answer is ["3.5"]
Answer and explanation
Step 1 is to calculate the volume of haloperidol lactate oral solution that contains 7 mg of haloperidol lactate. This is done by dividing the prescribed dose (7 mg) by the concentration of the oral solution (2 mg/mL). So, 7 mg ÷ 2 mg/mL = 3.5 mL.
So, the correct answer is 3.5 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
1 cup (8oz) plain low-fat yogurt. This is incorrect choice. Yogurt is a high-protein food that can increase nausea and reduce the absorption of levodopa/carbidopa. According to the American Parkinson Disease Association, taking levodopa/carbidopa with a small, low-protein snack can help with nausea symptoms.
Choice B rationale:
1 cup (8oz) of applesauce. This is a correct choice. Applesauce is a low-protein, low-fiber food that can help reduce nausea and improve the absorption of levodopa/carbidopa. According to Drugs.com, taking levodopa/carbidopa with foods that have a high fiber content can delay the drug’s absorption into the body. Applesauce also contains natural sugars that can provide some energy and hydration to the client.
Choice C rationale:
1 cup (8 oz) cooked spinach. This is an incorrect choice. Spinach is a high-protein, high-fiber food that can increase nausea and decrease the absorption of levodopa/carbidopa. According to the Parkinson’s Foundation3, dietary protein can interfere with the absorption of levodopa by competing with the same transporter in the gut and the brain. High-fiber foods can also slow down the gastric emptying and reduce the drug’s availability.
Choice D rationale:
1 oz of cheddar cheese. This is an incorrect choice. Cheese is a high-protein, high-fat food that can increase nausea and decrease the absorption of levodopa/carbidopa. According to the Parkinson’s Foundation, dietary protein can interfere with the absorption of levodopa by competing with the same transporter in the gut and the brain. High-fat foods can also delay the gastric emptying and reduce the drug’s availability.
Correct Answer is ["7.5"]
Explanation
To calculate the volume of fluoxetine to administer, we need to use the formula for dose conversion.
Step 1 is to set up the equation: 30 mg (desired dose) ÷ (20 mg/5 mL). This simplifies to 30 mg × (5 mL/20 mg). The mg units cancel out, leaving us with the volume in mL.
So, the correct answer is 7.5 mL.
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