A client with Parkinson's disease is prescribed carbidopa-levadopa [Sinemet]. Which of the following side effects does the nurse recognize can occur with this medication?

A) Normal saline 1 liter to client who is dehydrated:
Administering normal saline to a dehydrated client is an important task, as it helps to restore fluid balance and improve circulatory volume. However, while rehydration is critical, it is not an immediate, life-threatening priority compared to other interventions. The nurse should begin this infusion after addressing more urgent needs such as severe chest pain, which could indicate a cardiac emergency.

B) Morphine sulfate 4mg intravenously (IV) now for the client experiencing incisional pain:
Morphine is a potent analgesic, and relieving pain for postoperative patients is essential for comfort and recovery. However, incisional pain, although important to address, is not life-threatening in this scenario. The client with chest pain should be prioritized because chest pain could indicate a myocardial infarction (MI) or other serious cardiac event that requires immediate intervention.

C) Nitroglycerin (Nitrostat) 0.4 mg sublingually (SL) stat for the client experiencing crushing chest pain:
Crushing chest pain is a classic symptom of acute myocardial infarction (MI), a life-threatening condition that requires immediate intervention. Nitroglycerin is used to relieve chest pain associated with angina or MI by dilating the coronary arteries and improving blood flow to the heart. In this case, chest pain is the most critical symptom, and immediate treatment is necessary to reduce the risk of further cardiac damage or complications.

D) Lorazepam 2 mg IV now for the client who is anxious and restless:
While lorazepam is an effective medication for anxiety and restlessness, it is not the most urgent medication in this case. The client’s anxiety should be addressed, but it does not pose an immediate threat to life. Anxiety can generally be managed after more acute, life-threatening conditions (such as chest pain) are stabilized.

A) Peaked T waves:
Peaked T waves are a classic sign of hyperkalemia on an EKG. As potassium levels rise, the T waves become taller, more pointed, and narrow, indicating changes in the heart's electrical conduction. This is one of the earliest and most characteristic EKG changes seen with hyperkalemia. Hyperkalemia can result from conditions such as kidney dysfunction, use of potassium-sparing diuretics, or other electrolyte imbalances.

B) Inverted P waves:
Inverted P waves typically suggest issues such as atrial ischemia or ectopic atrial rhythms but are not a hallmark sign of hyperkalemia. They may also appear with other conditions, like atrial fibrillation or atrial flutter. However, inverted P waves are not typically linked to elevated potassium levels.

C) Widened QRS:
A widened QRS complex can occur in several conditions, including hyperkalemia, but it is generally seen in more severe cases. As potassium levels rise further, the QRS complex may widen due to delayed conduction through the ventricles. Although a widened QRS can indicate hyperkalemia, it is a later sign, and it typically occurs after more specific changes like peaked T waves.

D) Prominent U wave:
Prominent U waves are more often associated with hypokalemia (low potassium levels) rather than hyperkalemia. U waves are typically seen after the T wave on the EKG and can be more prominent in conditions of low potassium.