Gaviscon Double Action Liquid Sachets are fast-acting and long-lasting, working up to 2x longer than antacids. The effective formula treats heartburn and indigestion in two ways. Firstly, by neutralising excess stomach acid. Secondly, by lining the stomach contents with a liquid barrier to help stop acid from traveling up the oesophagus. Instant Action Relieves pain and discomfort of indigestion Neutralises stomach acid Forms a liquid raft to prevent acid reflux Suitable for use in pregnancy Convenient sachets you can use on the go. Please note that results may vary.