Primary Objective: To assess the efficacy of Rebamipide in combination with Esomeprazole in the improvement of symptoms of Functional Dyspepsia in Asian patients compared to Esomeprazole alone Secondary Objective: i. To assess the efficacy of Rebamipide in combination with Esomeprazole in the improvement of quality of life in Asian patients with Functional Dyspepsia compared to Esomeprazole alone ii. To assess the cost-effectiveness of Rebamipide in combination with Esomeprazole compared to Esomeprazole alone after 8, 12 weeks of treatment iii. To assess the safety of Rebamipide in combination with Esomeprazole in adults with functional dyspepsia after 8 weeks of treatment.