Which of the following is NOT a side effect of magnesium sulfate?

Magnesium sulfate is commonly used in various clinical scenarios, particularly in the management of preeclampsia and as a neuroprotective agent for preterm infants. It has a range of side effects due to its pharmacological action as a smooth muscle relaxant and central nervous system depressant.

Flushing commonly occurs as a result of the vasodilatory effects of magnesium sulfate, leading to warmth and redness in the skin. Muscle weakness is another recognized side effect, as magnesium can interfere with neuromuscular transmission. Palpitations may also occur since magnesium influences the cardiac muscle and its excitability.

Increased urination is not typically associated with magnesium sulfate administration. While various factors could cause changes in urinary output, magnesium sulfate does not directly lead to diuresis or increased urination. Therefore, it stands out as an effect that does not correlate with the pharmacodynamics of magnesium sulfate, making it the correct choice as an option that is not a side effect of the drug.