<prompt> Morphine is used in the treatment of:-HypeensionCardiac arrhythmiasAcute left ventricular failureA-V block  <response>: These are used as analgesic agents. Visceral, dull and constant pain is relieved more effectively than inflammatory pain. Opioids are however contraindicated in biliary colic. Morphine i.v. is useful in myocardial infarction as well as in pulmonary edema due to acute left ventricular failure. 