This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pre Anesthetic Evaluation, Subject name: Anaesthesia
Patient on oral lithium therapy. How many ours prior to surgery we stop lithium- 
Select and explain. 
A. 24 hrs, B. 48 hrs, C. 72 hrs, D. 96 hrs
A: 24 hrs
Answer: A: 24 hrs 
Explanation: Patient on oral lithium therapy needs to stop taking the medication 24-48 hrs prior to surgery. Lithium may potentiate neuromuscular blocker thus it is stopped prior to surgery.