“…3 Several interventions have been advocated to alleviate the pain associated with propofol injection, which include addition of lignocaine, ketamine, 4 acetaminophen, 5 tramadol, 6 different doses of lidocaine, 7 and different concentrations of propofol 8 and topical nitroglycerin. 9 Other studies have suggested other methods for controlling pain, including the injection of low doses of narcotics such as sufentanil and butorphanol 10,11 injection in large vessels and lignocaine injection together with tourniquet closure, 12 cold or warm propofol, 13 metoclopramide injection as a premedication, 14 magnesium, 15 beta blocker, 16 midazolam, 17 5-HT3 receptor antagonists, 18 or Alpha-2 agonists like dexmedetomidine. 19…”