A nurse is caring for a client who is receiving diazepam as sedation for an endoscopy, Which of the following antidotes should the nurse have on hand during the procedure?

Oxybutynin is an anticholinergic medication commonly used to treat urinary incontinence. One of the adverse effects of anticholinergic medications is the potential for bradycardia, which refers to a slower than normal heart rate. Anticholinergic medications can inhibit the effects of acetylcholine, a neurotransmitter responsible for regulating various bodily functions, including heart rate. Therefore, it is important to assess the client for signs of bradycardia after an unintended higher dose of oxybutynin.

Increased salivation (A) is not an expected adverse effect of oxybutynin. In fact, anticholinergic medications like oxybutynin often have the opposite effect, causing dry mouth and reduced salivation.

Hyperthermia (B) is not a typical adverse effect of oxybutynin. It is more commonly associated with other conditions or medications.

Urinary incontinence (C) is the condition that oxybutynin is intended to treat. It is not an adverse effect but rather the therapeutic effect of the medication.

A client with a magnesium level of 3.2 mEq/L has a higher-than-normal magnesium level, indicating hypermagnesemia. The nurse should expect to administer calcium gluconate.

Calcium gluconate is the antidote for hypermagnesemia, as it works to antagonize the effects of magnesium on the body. By administering calcium gluconate, the nurse can help counteract the effects of excess magnesium and normalize the client's magnesium levels.

Let's go through the other options:

B. Calcitonin: Calcitonin is not used to treat hypermagnesemia. Calcitonin is a hormone that regulates calcium and phosphorus levels in the body. It is used in certain conditions, such as hypercalcemia (high calcium levels), but it is not indicated for hypermagnesemia.

C. Magnesium oxide: Magnesium oxide is a form of magnesium supplement, and it is not appropriate for a client with hypermagnesemia, as it would further increase the magnesium level, exacerbating the condition.

D. Magnesium sulphate: Magnesium sulfate is also not appropriate for a client with hypermagnesemia, as it would further elevate the magnesium levels in the body. Magnesium sulfate is often used to treat magnesium deficiency or as a tocolytic agent to prevent premature labor.