Several medications, including Valtrex, are available to treat cold sores. Some are used topically (on the skin) and others are used orally (by mouth), but the goal is to treat cold sores as early as possible. That's because starting a medication when prodromal symptoms such as burning, tingling, or redness begin will give a person with a cold sore the best chance of either preventing an actual blister from forming or shortening a blister's course once it does appear. While the FDA has approved the use of certain drugs for cold sores, some antiviral drugs aren't specifically FDA-approved for cold sores but have been shown in clinical studies to be effective treatments. Given this, receiving a prescription for an off-label use of one of these drugs may help eliminate or prevent cold sores. Antiviral drugs can have several effects on oral herpes simplex viral infections, including cold sores. These medications can decrease the time that it takes for cold sores to heal and reduce symptoms, especially pain. This content has not been reviewed within the past year and may not represent Web MD's most up-to-date information. To find the most current information, please enter your topic of interest into our search box. 27, 2002 -- Here's good news for cold sore sufferers. Just one day of treatment with a medication called Valtrex makes the unsightly, painful sores disappear faster. A study presented at the American Academy of Dermatology's summer meeting, held in New York this week, outlines results from a large trial of Valtrex. "The findings of these studies are encouraging as they show there may be a convenient and effective way for people with cold sores to treat their outbreaks," says researcher Stephen K. Tyring, MD, Ph D, of the University of Texas Medical Branch at Galveston, in a news release. A one-day oral treatment that shortens the duration of outbreaks has clear advantages over currently available topical treatments, he says. Metformin replacement Fluconazole yeast infection Propranolol migraine prophylaxis It is also used to treat cold sores, and to treat and prevent recurrences of genital herpes. It works by interfering with the way the virus reproduces. Valacyclovir. Learn about Valtrex Valacyclovir Hydrochloride may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. Valacyclovir, also known as Valtrex, is one of the most common medications used to treat oral herpes cold sores and genital herpes. Valacyclovir works best if it is used within 48 hours after the first symptoms of shingles or genital herpes (e.g., pain, burning, or blisters) begin to appear. For recurrent outbreaks of genital herpes, valacyclovir works best if it is used within 24 hours after the symptoms begin to appear. If you are taking valacyclovir for the treatment of chickenpox, it is best to start taking valacyclovir as soon as possible after the first sign of the chickenpox rash appears, usually within one day. Valacyclovir may be taken with meals or on an empty stomach. If you are using the oral suspension, use a specially marked measuring spoon or other device to measure each dose accurately. The average household teaspoon may not hold the right amount of liquid. Drink extra fluids so you will pass more urine while you are using this medicine. Valacyclovir is used to treat infections caused by certain types of viruses. In children, it is used to treat cold sores around the mouth (caused by herpes simplex) and chickenpox (caused by varicella zoster). In adults, it is used to treat shingles (caused by herpes zoster) and cold sores around the mouth. The viruses that cause these infections continue to live in the body even between outbreaks. Valacyclovir is also used to treat outbreaks of genital herpes. Valacyclovir decreases the severity and length of these outbreaks. In people with frequent outbreaks, this medication is used to reduce the number of future episodes. It helps the sores heal faster, keeps new sores from forming, and decreases pain/itching. This medication may also help reduce how long pain remains after the sores heal. Read the Patient Information Leaflet if available from your pharmacist before you start taking valacyclovir and each time you get a refill. Valacyclovir cold sores Valacyclovir Oral Route Proper Use - Mayo Clinic, Valtrex Valacyclovir Hydrochloride Side Effects. Diflucan dosage instructions Valacyclovir For Cold Sores - Many people have used this specific Valacylovir Dosage For Cold Sores to help prevent nasty, unsightly outbreaks on the face. How To Use Valacyclovir For Cold Sores - How To. Valacyclovir Dosage Guide Cold Sores, Genital Herpes & More - Hims. Compare Acyclovir vs Valacyclovir for Cold Sores.. Find a comprehensive guide to possible side effects including common and rare side effects when taking Valtrex Valacyclovir. the treatment of cold sores. Valacyclovir is used to treat infections caused by certain types of viruses. In children, it is used to treat cold sores around the mouth caused by herpes simplex. Valtrex For Cold Sores - Many people have used this specific Valtrex Dosage For Cold Sores to help prevent nasty, unsightly outbreaks on the face.