The present invention is generally directed toward therapeutic compositions for treating infections caused by Herpes Simplex Virus (“HSV”). The therapeutic compositions meet a long felt need in the art of providing a treatment for lesions that result from HSV that drastically reduce the duration of a cold sore when vesicles have already appeared and a treatment that will prevent the outbreak of a lesion and formation of vesicles when applied in the prodromal stage. The therapeutic compound comprises a mixture of Acyclovir (“ACV”), Penciclovir (“PCV”), and dimethyl sulfoxide (“DMSO”). The therapeutic compositions of the present invention include multiple formulations of the three active ingredients and may also include inactive ingredients and/or additional active ingredients.