Cold Sore Treatment



Starting at


/ Dose

Banish those blisters and get back to your best with Valtrex.

Start Free Consultation


Valtrex contains the active ingredient valacyclovir and is a prescription medicine used to treat the herpes infections that cause cold sores (fever blisters) and genital herpes. Valtrex helps to make the symptoms of herpes infections less severe, less long lasting, and it can even prevent outbreaks from happening in the first place.


Valtrex is an antiviral medication that interferes with the growth of herpes viruses. It slows the spread of the virus through your body, helping your immune system to fight and clear it from infected cells. It can’t cure you of herpes entirely, as once you’ve been infected, herpes is with you forever. But it can prevent outbreaks from recurring and also help to clear up outbreaks of blisters faster, make them less itchy and painful.


Valtrex is taken orally as a pill with water. How often you take it will depend on your infection and circumstances. Our doctors will determine the correct dosage for you, and you should always take the medicine as they direct.

How safe is Valtrex?

Valtrex is a safe medication for most people over the age of 12 to use. There have been extensive clinical trials and it’s been used for over twenty years to fight herpes. All medications can have side effects though, and Valtrex isn’t suitable for everyone.


Valtrex is a brand name medication discovered and marketed by GlaxoSmithKline, and valacyclovir is the active ingredient in Valtrex that treats cold sores.

Other common

Who can use Valtrex?

Valtrex can be taken by anyone over the age of 12. Check with us before taking Valtrex if you are over 65, have kidney or liver problems, or have a weak immune system. Do not take Valtrex if you’re allergic to valaciclovir or acyclovir, or any of the other ingredients listed in the leaflet enclosed with the medication.

How to use Valtrex?

Valtrex is taken orally as a pill with water. How often you take it will depend on your infection and circumstances. Our doctors will determine the correct dosage for you, and you should always take the medicine as they direct.

When to take Valtrex for genital herpes and cold sores?

FROM MARS provides Valtrex or valacyclovir as a daily preventative treatment for patients who have already been diagnosed with herpes, to help lessen the frequency of outbreaks and reduce the risk of transmitting the virus.

It can be also taken as soon as the earliest symptoms are noticed during a persons first outbreak, however you will need to speak to a doctor or healthcare professional in this instance.

How fast does Valtrex work?

It depends on how severe your outbreak is, how quickly you take the medication after you notice the first symptoms, and the dose taken, but Valtrex typically works quickly and provides relief from symptoms within two to three days.

Can I still have sex during herpes treatment?

Don’t have sex if you have cold sores or blisters on your genitals or buttocks and the surrounding areas, or if you feel any other symptoms of an outbreak, such as the tingling sensation before the blisters form. The herpes viruses are highly contagious, and infections can be passed to others easily, even if you wear a condom. You can get back to sex after your treatment has finished and your outbreak has cleared up.

How long can you take Valtrex?

Valtrex can be taken once daily for long term preventative therapy of recurrent genital herpes.

How effective is Valtrex?

Research has shown that the active substance in Valtrex, called valacyclovir, is better absorbed by your body when taken orally than medications that contain acyclovir. The research shows that Valtrex helps to clear up outbreaks of cold sores and genital herpes faster than if no medication is taken, that it can prevent blisters from forming, and that it can help provide relief from the pain and discomfort caused by the blisters.

What is the difference between Valtrex and valaciclovir?

Valacyclovir is the name of the drug itself, and Valtrex is a brand name under which the drug is often sold. If you see medication called Valtrex or valacyclovir, they’re medically the same.

Will Valtrex cure herpes?

Unfortunately, no. There is currently no cure for herpes simplex infections. Once the virus infects you it takes up residence in the nerve cells of your skin. The virus goes dormant there, effectively hiding from your immune system and avoiding any medication. The virus reactivates every now and then causing a new outbreak of blisters. Medications like Valtrex help to manage and shorten these outbreaks.

Start strong.
Get $5 off your
first month with

You can also cancel anytime, free of charge. Easy breezy.