The caffeine in coffee relaxes the esophageal sphincter, which can lead to reflux. But even decaffeinated coffee may cause reflux problems: Research suggests the oils contained in both regular and decaffeinated coffee may play a role in heartburn. Experiment to see if cutting your coffee intake lessens your heartburn.
Alcohol can relax the sphincter and irritate the stomach, too, which can lead to reflux.
Additionally, slow down on soda. The carbon dioxide in soda pop and other bubbly drinks can cause stomach distention, which can push the contents of the stomach up into the esophagus.