Introduction: Succinylcholine is a short acting neuromuscular blocking age nt.. It has its own side effects which includes dysrhythmias, hyperkalemia, postoperative myalgias, etc. The incidence of muscle pain ranges from 0.2 to 89% and thus the need for the study. Materials and Methods: 60 adult patients are included in this prospective , randomised , double blind study who are scheduled to undergo elective surgery under general anaesthesia. Two groups were made randomly and Patients received either oral aspirin 600mg one hour before surgery or intravenous diazepam fifteen minutes before induction. Appropriate statistical tests were applied. Results: Status of muscle pain was recorded at 1st , 6th, 12th and 24th post operative period. Myalgia at 6th, 12th and 24th hour was significantly reduced in aspirin group compared to diazepam group. No difference was seen at one hour. Conclusion: It was concluded that aspirin prevents succinylcholine induced myalgia more effectively than diazepam in postoperative period. Keywords: Aspirin, Diazepam, Myalgia, Succinyl choline.