These symptoms are often linked; constipation can back up your digestive system, causing gas, acid reflux, and a poor appetite. For relief, you can try an over-the-counter osmotic laxative like polyethene glycol (MiraLAX) to ease constipation, which may resolve the other symptoms. For immediate acid reflux, an antacid or H2 blocker like famotidine can help. However, because these symptoms can sometimes indicate an underlying condition, please consult a doctor before starting any medication. Seek immediate medical attention if you experience severe abdominal pain, persistent vomiting, or unexplained weight loss. Stay hydrated and increase fiber intake gradually.