A nurse is caring for a client who has bipolar disorder and has been taking lithium for 1 year. Before administering the medication, the nurse should check to see that which of the following tests have been completed?

To calculate the volume of haloperidol solution needed, we can use the formula:

Volume(mL)=Dose(mg)/Concentration(mg/mL)

Given: Dose of haloperidol = 5 mg

Concentration of haloperidol solution = 20 mg/mL

Substituting the given values into the formula:

Volume(mL)=5 mg/20 mg/mL ​

Volume(mL)=5/20 

Volume(mL)=0.25 mL

Rounded to the nearest hundredth, the nurse should administer 0.25 mL of haloperidol solution.

A. Grapefruit juice inactivates this medication - Grapefruit juice is known to interact with certain medications, but it does not affect the metabolism of diazepam. Therefore, this statement is incorrect.

B. It is important to avoid foods that contain tyramine - Tyramine is typically associated with interactions with monoamine oxidase inhibitors (MAOIs), not benzodiazepines like diazepam. Therefore, this statement is incorrect.

C. This medication must be swallowed whole - While it is generally recommended to swallow diazepam tablets whole with a full glass of water, this instruction does not encompass the full range of information necessary for safe medication use.

D. Diazepam can cause drowsiness - This statement is correct. Diazepam, like other benzodiazepines, has sedative effects and can cause drowsiness. Patients should be advised to avoid activities that require mental alertness, such as driving, until they know how the medication affects them. This is an essential aspect of patient education regarding diazepam.