Rationale: Patients with chronic kidney disease (CKD) can experience a buildup of magnesium. Magnesium is excreted by the kidneys, and decreased kidney function may lead to a dangerous level of magnesium in the body. Magnesium-based antacids, like Mylanta, should be avoided by CKD patients. Iron may be prescribed for anemia. Baby aspirin may be appropriate for other health conditions. Taking fish oil does not have any contraindications in patients with CKD.