#GAVISCONADVANCE 150ML Soothing relief from heartburn, indigestion & reflux cough. Extra strength formula. Gets to work instantly. Lasts up to 2x longer than antacids. Suitable for use in pregnancy. Gaviscon Advance forms a ‘raft’ over the stomach contents, which helps prevent acid coming back up into the oesophagus (food pipe). Gaviscon Advance contains double the concentration of sodium alginate and forms a stronger more resilient raft compared to Gaviscon Original.