A nurse is caring for a client who has just begun therapy with alprazolam to treat anxiety. The nurse should monitor the client for which of the following adverse effects of this medication?

A. "Do not drink alcohol while taking this medication": Disulfiram is a medication used to deter alcohol consumption by producing unpleasant effects, such as nausea, vomiting, and flushing, if alcohol is consumed. Therefore, it is crucial for the client to abstain from alcohol while taking disulfiram to avoid these adverse reactions.

B. "Do not crush this medication before swallowing": While it is generally important not to alter the formulation of medications unless instructed by a healthcare provider or indicated in the medication's instructions, crushing disulfiram is not typically a concern. However, the primary focus of disulfiram therapy is the avoidance of alcohol, rather than specific administration instructions.

C. "Avoid grapefruit juice while taking this medication": Grapefruit juice is known to interact with certain medications by inhibiting cytochrome P450 enzymes in the liver, affecting drug metabolism. However, there is no significant interaction between disulfiram and grapefruit juice. Therefore, this information is not relevant to disulfiram therapy.

D. "Take this medication with food": Disulfiram is typically taken on an empty stomach, as food can interfere with its absorption. Therefore, advising the client to take disulfiram with food is not accurate and may compromise its effectiveness. The primary concern with disulfiram therapy is adherence to abstinence from alcohol.

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.