Fast Effective Relief from the Symptoms of Sore Throats with Strepsils Lozenges.. Strepsils Orange lozenges with dual anti-bacterial action help provide fast, effective relief from sore throat and mouth infections. These Strepsils Lozenges come with a boost of 100 mg of Vitamin C which helps replace the Vitamin C you may have lost during a cold. Directions: Children and Adults: Dissolve one lozenge slowly in the mouth every 2 to 3 hours, or as directed by the physician. Storage Instructions: Keep all medicines out of the reach of children. Store below 25°C.