Vicks Vaposyrup for Dry Coughs Soothes and calms dry coughs and quickly calms an irritated throat. Vicks Vaposyrup provides cough relief fast. This is becasue Vicks Vaposyrup starts to work immediatly on your cough with special throat coating ingredients which soothe your irritated throat. Drug Interaction Precautions: Contains 9 g of Sugar (present as Sucrose and Glucose) per 10 ml Dose. Diabetics should consult their doctor before using this product. Warning: Do not exceed the stated dose.