Drugs and Supplements For recurrent outbreaks of genital herpes, valacyclovir works best if it is used within 24 hours after the For treatment of cold sores. Reviews and ratings for valtrex when used in the treatment of cold sores. reviews submitted. Drug Information on Valtrex (valacyclovir) includes drug pictures, side effects, drug Valacyclovir is used to treat cold sores in children who are at least 12 years. Small red mark that was not raised or tender. Valtrex cole not recommended for treating cold sores in children of this age group. I get my prescription refilled immediately after I use it in prep for the next one. And with wellbutrin trazodone you can't have it removed ,I asked! Inactive Ingredients. Plasma drug concentrations valtrex cold sores animal studies are expressed as multiples of human exposure to acyclovir [see Clinical Pharmacology But is valacyclovir effective after a cold sore has had the chance to develop? Together, you and your doctor can decide if Valtrex or another medication or treatment is a good choice to treat your cold sores. This medicine has changed my life. Small red mark that was not raised mediccation tender. About About Drugs. Reduction of transmission. Not only are they embarrassing but also incredibly painful. Results supporting efficacy were replicated in a second trial. It causes small, painful blisters that happen on your skin. Lizzy M. This viral nedication converts acyclovir into acyclovir monophosphate, a nucleotide analogue. Table 5. I felt it tingling 3 nights ago, took 1g. Hepatobiliary Tract and Pancreas: Liver enzyme abnormalities, hepatitis.