This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Use of magnesium sulfate in pregnancy are ssociated with all of the following side-effects except: March 2010 
Select and explain. 
A. Muscular paralysis, B. Bradycardia, C. Cardiac arryhthmias, D. Respiratory depression
B: Bradycardia
Answer: B: Bradycardia 
Explanation: Ans. B: Bradycardia Magnesium sulfate (MgSO4) is commonly used as an anticonvulsant for toxemia and as a tocolytic agent for premature labor during the last half of pregnancy. Toxicity of I/V magnesium sulfate includes cardiac arrhythmias, muscular paralysis, respiratory depression and CNS depression in mother as well as the neonate.