A nurse is preparing to administer ampicillin 500 mg IM every 6 hr. Available is ampicillin 500 mg vial. The package insert instructs adding 1.8 mL of sterile water to yield ampicillin 250 mg/mL. How many mL should the nurse administer per dose?
(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation

The Correct Answer is ["2"]

To calculate the amount of ampicillin the nurse should administer per dose in milliliters (mL) for a 500 mg IM dose, we can use the following steps:

Given:

Ampicillin dose: 500 mg

Available concentration after reconstitution: 250 mg/mL

Volume of sterile water to be added: 1.8 mL

Step 1: Calculate the amount of ampicillin to be administered per dose in mL

First, we need to reconstitute the ampicillin vial to yield the desired concentration of 250 mg/mL.

The concentration after reconstitution is 250 mg/mL, and the total dose required is 500 mg. Therefore, the nurse needs to administer:

Volume = Ampicillin dose / Concentration

Volume = 500 mg / 250 mg/mL

Volume = 2 mL

Rounding to the nearest whole number:

Volume = 2 mL

Therefore, the nurse should administer 2 mL of the reconstituted ampicillin solution per dose.

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Free Nursing Study Resources

Correct Answer is ["0.04"]

Explanation

To calculate the amount of exenatide 10 mcg needed from a concentration of 250 mcg/mL, we can use the following formula:

Amount (mL) = (Desired dose in mcg) / (Concentration in mcg/mL)

Plugging in the values:

Amount (mL) = 10 mcg / 250 mcg/mL

Calculating:

Amount (mL) = 0.04 mL

Rounding to the nearest hundredth:

Amount to administer = 0.04 mL

A. Always check your apical heart rate before taking this medication B. Calcium channel blockers may cause increased blood pressure, so immediately report blurred vision C. These medications are best taken at night to reduce cholesterol D. Do not drink grapefruit juice while on this medication

Correct Answer is D

Explanation

Choice A reason: This choice is incorrect because checking the apical heart rate before taking calcium channel blockers is not necessary for most patients. Calcium channel blockers are a group of medications that relax and widen blood vessels, lower blood pressure, and slow the heart rate. They are used to treat conditions such as hypertension, angina, and arrhythmias. The nurse should check the apical heart rate only if the patient has a history of bradycardia (slow heart rate) or heart block (a problem with the electrical conduction of the heart).

Choice B reason: This choice is incorrect because calcium channel blockers do not cause increased blood pressure, but rather lower it. Blurred vision is not a common side effect of calcium channel blockers, and it may indicate other problems, such as eye infection, glaucoma, or stroke. The nurse should instruct the patient to report any changes in vision, but not to associate them with calcium channel blockers.

Choice C reason: This choice is incorrect because calcium channel blockers do not affect cholesterol levels, and the time of day they are taken does not matter. Cholesterol is a type of fat that circulates in the blood and can build up in the arteries, causing atherosclerosis (hardening and narrowing of the arteries). Cholesterol levels are influenced by diet, exercise, genetics, and other medications, such as statins. The nurse should advise the patient to follow a healthy lifestyle and take any prescribed medications for cholesterol control.

Choice D reason: This choice is correct because grapefruit juice can interact with some calcium channel blockers, such as nifedipine, verapamil, and diltiazem, and increase their blood levels and effects. This can cause serious side effects, such as low blood pressure, dizziness, headache, flushing, and edema (swelling). The nurse should warn the patient to avoid grapefruit juice and any products that contain grapefruit while taking calcium channel blockers.

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer exenatide 10 mcg subcutaneous. Available is exenatide 250 mcg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["0.04"]

Explanation

Which of the following is most important for the nurse to include with calcium channel blockers?

Correct Answer is D

Explanation

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A client has been prescribed nifedipine for angina. What is the priority assessment for the nurse to make prior to giving this medication?

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