Patients with gastroesophageal reflux disease can drink sugar water after vomiting, as sugar water is not spicy or irritating. Patients should avoid spicy foods, chocolate, coffee, strong alcohol, and strong tea, and should consume low-fat foods. It's also important for patients to eat frequent small meals rather than large ones, especially during dinner, and to avoid lying down immediately after eating. They should also consistently take their prescribed medication and go for regular check-ups.