Clinical Study, Multicenter, Randomized With 2 Arms of Pantoprazole + Domperidone and Pantoprazole Isolated at the Gastroesophageal Reflux Disease

1. Subscription of IC;
2. Age ≥ 18 years and \<70 years
3. Diagnosis initial clinical or previous symptomatic GERD;
4. Symptom score ≥ 4;
5. Ability to conduct examinations of endoscopy;
6. Ability to perform washout of drug classes PPIs, H2 antagonists, and prokinetics for at least 14 days.

Exclusion Criteria:

1. Presence of esophagitis requiring intervention, esophageal varices, Barrett's esophagus, scleroderma, ulcers (gastric or duodenal), atrophic gastritis, or vagotomy pangastritis detected at the time of study enrollment;
2. Eradication treatment of H. pylori completed less than 15 days of V0;
3. Presence of alarm symptoms (weight loss greater than 5% in the last 60 days, no evidence of gastrointestinal bleeding);
4. Gastric or esophageal surgery prior (except for simple ulcer closure);
5. Females in pregnancy, lactation, or who wish to become pregnant if they refuse to use adequate contraception during the study period.
6. Concomitant serious diseases such as kidney failure, heart and liver;
7. Suspected or confirmed any cancer except carcinoma in situ or nonmelanoma skin cancer diagnosed in the last 5 years;
8. History of gastric cancer in relatives of 1st degree;
9. Use of illicit drugs or alcohol abuse according to the investigator;
10. Values changed (outside the normal range for the local laboratory) in leukocytes, platelets or hemoglobin;
11. Significant changes in serum sodium, potassium, calcium or creatinine;
12. Intolerance or allergy to any component of the drugs evaluated in the study;
13. Use of anti-inflammatory drugs (NSAIDs), antiemetics, macrolides and systemic steroids for a period of not less than 2 weeks prior to the study or who have expected necessity of prolonged use during the study treatment;
14. Current use of bisphosphonates, as well as those who need calcium channel blockers or other drugs that affect esophageal motility or lower esophageal sphincter tone.
15. Use of other scheduled medications metabolized by cytochrome CYP3A4 during the study;
16. Participation recent (past 12 months) or participation in a clinical trial expected during this study in other clinical trials involving drugs of any kind.