 [ Symptoms ] what is the difference between singulair and montelukast im afraid to use montelukast sod what is the diffrence there has to be thats why its cheaper i have really bad allegies [ Disease ] i am not sure what you mean about a dash on the food label it typically contains quantities like 0 or more this article how to read a food label should help you there is also a book entitled read it before you eat it that walks you through the food label and what it means if you cannot find the sugar on a product i suggest you call the manufacturer to be sure