Coatal Softgel 80/480mg is indicated for the relief of symptoms associated with gastroesophageal reflux disease (GERD) and peptic ulcers, contraindicated in patients with hypersensitivity to any of its components, may cause side effects such as nausea, diarrhea, and abdominal pain, and can interact with other medications like antacids or certain antibiotics, affecting their absorption and efficacy.