Strepsils with lidocaine belongs to the group of medicines called antiseptics. Strepsils with lidocaine is an association of two antiseptics, alcohol 2.4-dichlorobencylic and amymilmetacresol, and a local anesthetic for the throat, lidocaine hydrochloride.
It is used for symptomatic local relief of mild mouth and throat infections that occur with pain and fever in adults and adolescents from 12 years of age.
You should see a doctor if it gets worse or if it does not improve after 2 days of treatment.