Gastro-Stop Home ›› Local Listings ›› NSW ›› St Leonards ›› Gastro-Stop NSW Health St Leonards, NSW 2065 Sofiann McKerrell+61 2 8436 8300https://www.gastrostop.com.au Diarrhoea can cause your digestive system to go into overdrive. Gastro-Stop helps to restore the natural rhythm of your digestive system so that you can get back to enjoying your day. Gastro-Stop provides relief from acute diarrhoea and most people experience noticeable improvement within one to three hours after the first dose.