Gaviscon Dual Action Chewable Tablets in Peppermint flavour helps relieve heartburn and indigestion. Fast, soothing and long-lasting relief from the pain and discomfort of heartburn and indigestion. Available in tablets for convenient relief on-the-go. It works in two different ways: 1. The antacid – neutralises excess stomach acid. 2. The raft – the sodium alginate forms a ‘raft’ on top of your stomach contents. It acts as a physical barrier that helps to soothe the burning pain in your chest.