Dry mouth, abdominal pain, distention or discomfort, nausea, vomiting, fatigue, flatulence, dyspepsia, constipation, epigastric pain, paralytic ileus, toxic megacolon. Rarely, drowsiness & dizziness; pruritus, rash, urticaria, angioedema & bullous eruption including SJS, erythema multiforme, & TEN. Very rarely, allergic reactions including unexplained wheezing, shortness of breath, passing out or face & throat swelling.