Gaviscon(R) Extra Strength Liquid provides fast relief from heartburn and acid reflux that lasts for hours. Feel Gaviscon(R)'s foaming action start to work as soon as you take it. Doctor recommended Gaviscon (R) is free from sugar, lactose and gluten. Fruit Blend flavour; 340 ml.Adult dosage: Shake well. Take 2 teaspoons up to 8 times per day or 4 teaspoons up to 4 times per day, when symptoms occur, or take as directed by a doctor.