Strepsils sore throat and blocked nose lozenges contains two active ingredients for use in throat medications these are used for the symptomatic relief of mouth and throat infections these ingredients are both mild antiseptics which kill the bacteria associated with mouth and throat infections the action of sucking the lozenge allows the active ingredients to work in the area of the discomfort and also helps lubricate and soothe the painful area this helps relieve the soreness and discom