The purpose of the study is to evaluate and compare the pharmacokinetics (blood levels) of 2 different formulations, assess the effect of food on the pharmacokinetics and assess safety of rabeprazole sodium in healthy volunteers. Rabeprazole sodium is a drug used to treat patients with Gastro Esophageal Reflux Disease (GERD). GERD is a condition in which the esophagus (tube from throat to stomach) becomes irritated or inflamed because of acid backing up from the stomach.