Gaviscon peppermint liquid relief brings fast soothing action and long lasting relief from the pain and discomfort of heartburn and acid indigestion it can be used to treat gastric reflux a condition in which the acid stomach contents flow upwards into the foodpipe and flatulence caused by gastric reflux it belongs to a group of medicines called reflux suppressantseach 10ml dose of oral suspension contains 500mg sodium alginate ph eur 267mg sodium bicarbonate ph eur and 160mg calcium ca