A nurse is teaching a client who is pregnant and has iron-deficiency anemia about taking ferrous sulfate elixir, Which of the following instructions should the nurse include in the teaching? (Select all that apply.)

A. Simvastatin 40 mg PO at bedtime: This prescription is clear and specifies the medication (Simvastatin), the dose (40 mg), route (PO – oral), and timing (at bedtime). There is no need for clarification.
B. Morphine 4 mg IV every 4 hr PRN for pain: The need for clarification arises here because "PRN" (pro re nata) means "as needed," and prescribing an IV medication on an as-needed basis might need further clarification regarding the specific indications and circumstances for administering the medication.
C. Levothyroxine 100 mcg PO every morning: This prescription is clear and specifies the medication (Levothyroxine), the dose (100 mcg), route (PO – oral), and timing (every morning). There is no need for clarification.
D. Acetaminophen 500 mg every 4 hr PRN for fever: Similar to option B, there might be a need for clarification regarding the specific indications and circumstances for administering acetaminophen on an as-needed basis. However, in many cases, PRN for fever is reasonable, so it may not be as critical as in the case of an IV pain medication.

A. Hypocalcemia: Hydrochlorothiazide is not typically associated with lowering calcium levels. Hypocalcemia is not a common adverse effect of this medication.
B. Hypernatremia: Hydrochlorothiazide is a diuretic that increases urination, leading to the loss of water and sodium. While it can cause sodium depletion, it's less likely to result in hypernatremia, which refers to high sodium levels in the blood.
C. Hypokalemia: Hydrochlorothiazide is a thiazide diuretic that can increase the excretion of potassium in the urine. Hypokalemia (low potassium levels) is a known adverse effect of this medication due to its action on the kidneys leading to potassium loss.
D. Hypermagnesemia: Hydrochlorothiazide does not typically cause an increase in magnesium levels. It's more likely to cause magnesium loss through increased urination, potentially leading to hypomagnesemia (low magnesium levels) rather than hypermagnesemia.