Valtrex Tablets

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Fast and effective anti-viral treatment for outbreaks of cold sores.

Looking for Genital Herpes Treatment? Click here to see Valtrex for Genital Herpes

What is Valtrex?

Valtrex is an antiviral medication used to treat the current and future outbreaks of cold sores caused by the herpes simplex virus (HSV-1) in adults. Valtrex contains the active ingredient Valaciclovir and is effective at stopping the herpes simplex virus from reproducing. Valtrex helps to reduce the severity and the length of the outbreak, helping sores heal quicker and prevents new cold sores from forming.

It’s important to note that Valtrex is not a cure for herpes, but suppresses the virus to help control the symptoms and prevent further outbreaks.

How does Valtrex treat cold sores?

Valtrex works by interfering with the herpes virus whilst it reproduces, preventing it from multiplying and reducing the rate of the spread of infection. Valtrex is a prodrug, which means it converts to another substance in the body. Valtrex containing Valaciclovir, converts into Aciclovir when it enters the body.

How do I take Valtrex?

The usual dose to treat cold sores is 4 x 500mg (2000mg) tablets, taken twice a day with water. The second dose should be taken 12 hours (no sooner than 6 hours) after the first dose. You should take Valtrex for the treatment of cold sores for one day (two doses).

It is important to remain hydrated during the course of your treatment to minimise the risk of dehydration.

How effective is Valtrex at treating cold sores?

Valtrex starts working almost immediately after you start taking it and is effective in reducing the healing time and reducing the risk of transmission to other people. Valtrex is also proven to be effective in treating genital herpes and other HSV infections of the skin. Valtrex has also shown to have similar effects in treating cold sores as the comparable treatment, Aciclovir.

What is the difference between Valtrex and Generic Valaciclovir?

Valtrex and Generic Valaciclovir are medically equivalent in strength and efficacy; they both effectively treat cold sores. However, Valtrex is the branded version of Generic Valaciclovir and is consequently more expensive.

 Information Leaflet

Always read the patient information leaflet before commencing treatment.

Written and reviewed by our qualified team

GPhC Number: 2088658

Carolina Goncalves

Authored by:

Carolina Goncalves


GPhC Number: 2225869

Rehma Gill

Reviewed by:

Rehma Gill


Find out more about how we ensure the accuracy of our content with our content guidelines.

Content last updated: 23 Feb 2023

Valtrex Reviews

10/ 10
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Feefo logo

Based on 44 independent customer reviews taken by Feefo (see all Feefo Reviews), Google and Trustpilot (see all Trustpilot Reviews).

"Highly recommended"

Product Review:

"Effective and fast delivery! 5*"

Service Review:

"Such an easy and straight forward process when you cannot get to a pharmacy! Excellent service."

(read on Feefo)

Product Review:

"they seem to be working to stop a cold sore flare"

Service Review:

"Quick and efficient."

(read on Feefo)
"Very good"

Product Review:

"Nice discount. Good service."

Service Review:

"Good service. Fast delivery."

"fast delivery and great item really…"

Product Review:

"Great product nothing usually works but this eases the inflammation and helps to reduce the time i have it. "

Service Review:

"fast delivery and great item really helps to ease symptoms"

"Medication for holiday"

Product Review:

"This product is excellent and Pharmica can deliver it out to you in a day. It will arrive in discreet packaging perfectly packaged. It is useful to have for any breakouts or for suppression therapy you have to fill in a questionnaire before purchase to ensure you have the right medication."

Service Review:

"With my son going away to Africa in the next week we needed medication such as malaria tablets. Upon ordering the app then suggested other items which he might need such as Imodium for upset stomach and rehydration sachets. The items were delivered the next day in discreet unmarked packaging. All in all very good service!"

(read on Feefo)
"Great delivery time"

Product Review:

"Good quality and useful discreet packaging"

Service Review:

"I can trust on excellent service and delivery time in confidential packaging with products delivered straight to my door in record time!"

"Quick and easy to use"

Product Review:

"Great product helps me after weight loss surgery "

Service Review:

"Quick and easy to use. Speedy postage."

(read on Feefo)
"Best Pharmacy"

Product Review:

"Great help before a breakout and reduction of swelling and pain."

Service Review:

"Fast receipt of good and no hassle so happy to have found this. Medication that helps and relieves my symptoms straight away. Thanks"


Product Review:

"Worked great."

Service Review:

"Great! Needed some antibiotics for cold sores. Quick delivery easy to order will use again thankyou."

(read on Feefo)

Product Review:

"These tablets are new and work very well . And you don’t need to take as many. The tablets are only a little more money than the others but worth it ."

Service Review:

"The service was very quick and efficient. The products on offer are better than other comparison sites. Thank you for your great customer service"

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