A nurse is talking with a client who has been taking levothyroxine to treat hypothyroidism.
The nurse should instruct the client to avoid taking which of the following over-the-counter medications within 4 hr of taking levothyroxine?

To solve this problem, we first need to convert the client’s weight from pounds to kilograms. Then, we can calculate the total amount of amikacin needed. Finally, we can find out how many milliliters of amikacin injection the nurse should administer.

1. Convert the client’s weight to kilograms: Given that 1 kg = 2.2 lbs, we can calculate the client’s weight in kilograms as follows:

Weightinkg=WeightinlbsConversionfactor=110lbs2.2lbs/kg≈50kgWeightinkg=ConversionfactorWeightinlbs​=2.2lbs/kg110lbs​≈50kg

1. Calculate the total amount of amikacin needed: The doctor ordered 5 mg of amikacin per kg of body weight, so the total amount of amikacin needed is:

Totalamikacin=Doseperkg×Weightinkg=5mg/kg×50kg=250mgTotalamikacin=Doseperkg×Weightinkg=5mg/kg×50kg=250mg

1. Find out how many milliliters of amikacin injection the nurse should administer: Given that the available amikacin injection is 250 mg/mL, we can calculate the volume of injection needed as follows:

Volumeofinjection=TotalamikacinConcentrationofinjection=250mg250mg/mL=1mLVolumeofinjection=ConcentrationofinjectionTotalamikacin​=250mg/mL250mg​=1mL

So, the nurse should administer 1 mL of amikacin injection.

Choice A rationale:

Donepezil does not decrease urinary output. It works by increasing the amount of a certain naturally occurring substance in the brain.

Choice B rationale:

Donepezil does not improve pulmonary function. Its primary function is to improve mental function.

Choice C rationale:

Donepezil improves cognitive function. It can improve thinking ability and slow the loss of these abilities in people who have Alzheimer’s disease.

Choice D rationale:

Donepezil does not decrease the incidence of seizures. In fact, patients should inform their healthcare provider if they have a history of seizures before starting donepezil.