Sona Zinc Chewable Tablets (24). Sona ZinC chewable is a strawberry and vanilla flavoured chewable tablet containing immune boosting ingredients such as Zinc and Vitamin C.. Vitamin C can be depleted from the body in times of cold and flu and is important for immune system function, energy metabolism and the reduction of tiredness and fatigue. Zinc contributes to the normal function of the immune system.. The action of sucking the tablets is soothing to the mouth and throat. Sona ZinC chewable throat lozenges are manufactured to the highest standards and provides 7mg of Zinc and 300mg of Vitamin C per lozenge.