The drug is used at caused by the herpes simplex virus - infections of the skin and mucous membranes; - cold sores; For the soothing treatment of pain and itching in the case of frequently recurring herpes infections with blistering in the lip area (recurrent herpes labialis). - Genital herpes infections (initial infection as well as frequently recurring infections in the genital area); - inflammation of the cornea of the eye. Preventive treatment should be attempted in adult patients who have very severe forms of very frequently recurring genital herpes simplex infections.