Which of the following drug(s) may cause hypermagnesemia in enterally fed patients?

Hypermagnesemia, or elevated magnesium levels in the blood, can be a significant concern for entering fed patients, particularly when certain medications are involved. In this context, all the choices contribute to the potential for hypermagnesemia, particularly in those with pre-existing conditions such as renal dysfunction, which affects the body's ability to excrete excess magnesium.

Magnesium-containing antacids can lead to hypermagnesemia, especially in patients with renal dysfunction where magnesium clearance is compromised. As their kidneys struggle to eliminate excess magnesium, supplementation from antacids can accumulate in the body, leading to dangerously high levels.

Laxatives, particularly those containing magnesium (like milk of magnesia), also pose a risk as they can significantly increase magnesium absorption from the gastrointestinal tract, especially in enterally fed patients. When these patients are already at risk due to impaired renal function, the addition of magnesium-rich laxatives can further exacerbate hypermagnesemia.

Amphotericin, an antifungal medication, can be associated with electrolyte imbalances, including hypermagnesemia, when used in the context of renal impairment. It can complicate the electrolyte status of a patient, contributing to elevated magnesium levels.

Therefore, the option that encompasses all these factors leading to