300
Participants
Start Date
April 30, 2015
Primary Completion Date
December 31, 2015
Study Completion Date
January 31, 2016
Simethicone
100mL of water plus 100mg Simethicone by mouth, 15 to 30 minutes before endoscopy
Acetylcysteine
100mL of water plus 100mg Simethicone plus 600mg N-acetylcysteine by mouth, 15 to 30 minutes before endoscopy
Placebo
100mL of water
Portuguese Oncology Institute - Coimbra, Coimbra
Portuguese Oncology Institute, Coimbra
OTHER