MSFinals-6300

A 36-year-old male comes to the Emergency Department complaining of abdominal pain that has been bothering him for 10 hours. He feels the pain on his right side and it radiates from the side of his abdomen down to his groin. Upon urinalysis, blood and leukocytes are detected. He requests pain relief. What is the most suitable analgesic to administer based on the probable diagnosis?