Master-Gest is used to treat bloating and colic in infants and children. It relaxes the digestive system. Eliminates flatulence. Reduces indigestion. Relieves irritable bowel syndrome. Master-Gest is used to treat colitis and as an antispasmodic and has a strong effect on the involuntary muscles in the digestive system. Master-Gest is used as an effective aid in treating anxiety, stomach pain or colic.