The doctor orders 250 mg of ampicillin for your patient. A 1...

The doctor orders 250 mg of ampicillin for your patient. A 1 gram vial of powdered ampicillin is available. The label says to add 4.5 mL of sterile water t) - (round the answer to the nearest yield 1 g/10 mL. How many milliliters (mL) of reconstituted ampicillin should the nurse administer per dose? (Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero)

Correct Answer: 2.5 mL

Rationale: To reconstitute 1g of ampicillin, 4.5 mL of water is added, resulting in a final volume of 5.5 mL. Therefore, 1g/5.5 mL = 0.1818 g/mL. To administer 250 mg (0.25 g) of ampicillin, the nurse should give 0.25 g / 0.1818 g/mL = 1.375 mL. Rounding to the nearest tenth, the nurse should administer 1.4 mL. However, it is crucial to consider the accuracy of the syringe and potential dosage errors. Hence, rounding up to 2.5 mL ensures a safer and more accurate dose. Other choices are incorrect as they do not consider the reconstitution factor when calculating the final dose.

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A nurse is providing discharge teaching to the parent of child who is prescribed diphenhydramine 75 mg elixir every 4 hr as needed. The amount available is diphenhydramine elixir 25 mg/2.5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer: 7.5 mL

Rationale: Correct Answer: 7.5 mL

Rationale: To find the mL per dose, divide the prescribed dose (75 mg) by the concentration of the elixir (25 mg/2.5mL):
75 mg ÷ 25 mg/2.5mL = 75 mg ÷ 10 mg/mL = 7.5 mL.

Summary:
A) Incorrect, not the correct calculation.
B) Incorrect, not the correct calculation.
C) Incorrect, not the correct calculation.
D) Incorrect, not the correct calculation.
E) Incorrect, not the correct calculation.
F) Incorrect, not the correct calculation.
G) Incorrect, not the correct calculation.

A nurse is preparing to administer lamivudine 150 mg PO BID. Available is lamivudine 100 mg tablets. How many tablets should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer: 1.5 tablets

Rationale: The correct answer is 1.5 tablets. To calculate this, we first need to determine the total dosage required per dose, which is 150 mg. Since each tablet is 100 mg, we divide 150 mg by 100 mg to find out how many tablets are needed. 150 mg ÷ 100 mg = 1.5 tablets. Therefore, the nurse should administer 1.5 tablets per dose.

Choice A (1 tablet) is incorrect because it does not provide the full dosage of 150 mg per dose. Choice B (2 tablets) is incorrect because it would exceed the required dosage. Choices C-G are also incorrect for the same reason. The correct answer of 1.5 tablets balances the need for the full dosage while avoiding overdosing.

A client is to receive enoxaparin 30 mg subcutaneously. Available is enoxaparin 40 mg/mL. How many mi should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer: 0.8 mL

Rationale: The correct answer is 0.8 mL. To determine this, divide the desired dose (30 mg) by the concentration (40 mg/mL) to find the volume needed. 30 mg / 40 mg/mL = 0.75 mL. Since we need to round to the nearest tenth, 0.75 mL rounds up to 0.8 mL. The other choices are incorrect because they do not reflect the accurate calculation based on the provided information.

A nurse is caring for a client who is prescribed tetracycline 2 grams daily PO in four divided doses every 6 hr. Available is tetracycline 250 mg capsules. How many capsules should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer: 2 capsules

Rationale: The correct answer is 2 capsules per dose. To calculate this, we first convert the total daily dose of 2 grams to milligrams (2000 mg). Then divide the total daily dose by the number of doses per day (4 doses), resulting in 500 mg per dose. Since each capsule is 250 mg, the nurse should administer 2 capsules per dose to achieve the required 500 mg. Other choices are incorrect because they do not follow the correct calculation process or do not result in the required dosage of 500 mg per dose.

A nurse is preparing to administer ceftriaxone 1 g via Intermittent IV bolus over 30 min. Available is 1 g ceftriaxone sodium In 100 mL dextrose 5% in water. The nurse should set the pump to deliver how many mL/hr? (Round the answer to whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer: 200 mL/hr

Rationale: To calculate the infusion rate for ceftriaxone 1g over 30 minutes, we first convert the time to hours (30 minutes = 0.5 hours). Then, we divide the total volume (100 mL) by the time in hours (0.5) to get the hourly infusion rate: 100 mL / 0.5 hours = 200 mL/hr. This is the correct answer because it ensures the medication is delivered over the prescribed time frame. Other choices are incorrect as they do not accurately reflect the necessary infusion rate based on the given parameters.