LICENSED PHARMACY & UK-LICENSED DOCTORS · FREE DISCREET DELIVERY

VALACICLOVIR · GENERIC VERSION OF VALTREX · TABLET

VALACICLOVIRTABLETS

The generic version of Valtrex for cold sores, prescribed online by UK clinicians after a free consultation.

Valaciclovir tablets
2TIMES A DAY
250/500MG STRENGTHS
2–3DAYS TO RELIEF
12+AGE AND OVER

Free discreet delivery

Valaciclovir is a prescription-only medicine that is used to treat the herpes simplex virus.

Get clear with valaciclovir. And get back in the game. Valaciclovir is prescribed online with a free doctor consultation.

ABOUT THE MEDICATION

WHAT IS VALACICLOVIR?

Valaciclovir is an antiviral medication used to manage the herpes infections that can cause genital herpes and cold sores. Usually taken in pill form, it helps to make outbreaks of cold sores and genital herpes less severe, clearing them up faster, and preventing outbreaks from reoccurring.

The virus can lay dormant for long periods of time, during which you won’t experience any symptoms. However, when the virus is active, it can cause painful and itchy blisters around the mouth or genital area. Valaciclovir can help manage these symptoms.

KEY FACTS

  • TWICE A DAY

    The main benefits of valaciclovir over other treatments is that you only need to take it twice a day to treat an outbreak.

  • 250 MG AND 500 MG

    Valaciclovir usually comes in 250 mg and 500 mg tablets.

  • HSV1 AND HSV2

    There are two types of herpes simplex virus, HSV1 and HSV2, valaciclovir works on both types by suppressing the virus, reducing painful symptoms and preventing future outbreaks.

  • NOT A CURE

    Currently there is no known cure for herpes, as once the virus infects you, it goes dormant in your body and hides from your immune system and any medication.

  • AGE 12 AND OVER

    Valaciclovir can be used by adults, and children over the age of twelve.

How it works

Online consultation questionnaire on a phone
01

FREE ONLINE CONSULTATION

For your health and safety, all prescription drugs available for purchase require approval from our licensed doctors through a free online consultation where you will be asked some questions about your symptoms and medical history.
Messages from your doctor in your account
02

DISCREET NEXT DAY DELIVERY

Your information is confidential and will only be shared with your doctor who will determine if a prescription treatment is right for you. If your prescription treatment is approved, your order will be delivered to you with discreet packaging the next business day.
From Mars monthly treatment pack
03

ONGOING CARE FROM UK DOCTORS

As a FROM MARS customer, you will receive ongoing care and support from UK Doctors. You can send unlimited secure messages to your doctor from your account to discuss your treatment, progress, and possible adjustments of your treatment or dosage.

VALACICLOVIR

Valaciclovir tablets
  • Swallow the tablet whole with water
  • Twice a day to treat an outbreak
  • Disrupts the virus’ ability to reproduce
  • Relief after two to three days

How Valaciclovir Works

How does valaciclovir work?

Valaciclovir disrupts the virus’ ability to reproduce, slowing its spread through infected skin, and making it easier for your immune system to tackle it.

Shorter, less severe outbreaks

It can’t cure a herpes infection permanently, as once someone has a herpes infection, they have it forever, but it can help make outbreaks shorter and less severe, as well as reducing itching, pain and swelling. It can even prevent outbreaks from happening.

In Practice

How fast does it work?

  • Relief in two to three days

    It begins working as soon as it’s in your system, with most people beginning to feel relief from their symptoms after two to three days.

  • Start as early as you can

    How quickly valaciclovir works depends on how severe the outbreak is, the dosage used, and how quickly the medication is taken after the first symptoms are noticed.

  • Complete your treatment

    Yes, it is very important that you complete your treatment. Valaciclovir only works if you take it regularly and as prescribed.

Dosing & How to Take

HOW TO TAKE VALACICLOVIR

01

Swallow it whole

It’s usually taken as a tablet, which you should swallow whole with a glass of water, at the same time every day, for the number of days prescribed.

02

As prescribed

It’s important to always take it exactly as prescribed.

03

Missed dose

If you forget to take it, do so as soon as you can, unless it’s nearly time for your next dose.

04

Never double dose

Never double dose to make up for a missed one.

Side Effects

POSSIBLE SIDE EFFECTS
OF VALACICLOVIR

As is the case with most medicines, you may experience some side effects when taking valaciclovir. Remember, people respond to medications differently meaning you might not experience any side effects. If you do, it will likely involve:

VERY COMMON — MORE THAN 1 IN 10

SIDE EFFECTS

Headache

WHAT TO DO

Remember, people respond to medications differently meaning you might not experience any side effects.

COMMON — UP TO 1 IN 10

SIDE EFFECTS

Sickness, sore throat, vertigo, dizziness, vomiting, diarrhoea, constipation, rash, skin sensitivity to sunlight (photosensitivity), itching (pruritus)

WHAT TO DO

Valaciclovir can make you more sensitive to sunlight and increase your risk of sunburn. You should apply sunscreen when using this medication.

UNCOMMON — UP TO 1 IN 100

SIDE EFFECTS

Fatigue, shortness of breath (dyspnoea), stomach discomfort, rash, sometimes an itchy, hive-like rash (urticaria), low back pain (kidney pain), blood in the urine (haematuria), confusion, hallucinations, feeling very drowsy, feeling agitated, tremors

WHAT TO DO

These nervous system side effects can be experienced by people with kidney problems or who have recently had an organ transplant, as well as the elderly. If that’s you, these side effects will usually diminish if you stop taking valaciclovir or if the dose is reduced.

Side effects to look out for which indicate you’re having a severe allergic reaction (anaphylaxis): flushing, itchy skin, and/or a rash; swelling of the lips, face, neck, and throat, making it difficult to breathe (angioedema); a rapid fall in blood pressure leading to collapse. Valaciclovir allergies are rare, but if you do experience these symptoms stop taking the medication and see a doctor as quickly as possible. If you have any other concerns about the side effects of valaciclovir, contact us.

Safety

Is valaciclovir safe?

Used for over twenty years

20+

years used to fight herpes, backed by extensive clinical trials

Valaciclovir 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.

How effective is it?

2–3

days to feel relief from symptoms

Research has shown that valaciclovir is better absorbed when taken orally than other medications that contain acyclovir. It has also been shown to help clear up outbreaks of cold sores and genital herpes much quicker than when no medication is taken.

Not suitable for everyone

All medications can have side effects though, and valaciclovir isn’t suitable for everyone. If you experience any side affects you should stop taking the medication. We recommend reading the link below to understand all of the potential benefits and risks of the medication.

Before taking valaciclovir or any medication, it is important to read the Patient Information Leaflet.

Valaciclovir dosage
and strength

Valaciclovir usually comes in 250 mg and 500 mg tablets. How much you’ll need to take, and for how long, will depend on your particular circumstances. If you experience regular outbreaks, such as 5 or 6 times a year, you can be prescribed a long term daily dose of valaciclovir to suppress the virus.

STRENGTH
WHEN IT'S USED
NOTES
500 mg twice a day
First outbreak
Your doctor will generally recommend taking a 500mg tablet twice a day for 5 – 10 days.
500 mg twice a day
Recurring outbreaks
Your doctor will usually recommend taking a 500mg tablet twice a day for 3-5 days.

Progress Over Time

What to Expect
with Valaciclovir

  • Symptoms

    Symptoms such as painful and itchy blisters should calm down and disappear when you are taking valaciclovir.

  • Outbreaks

    You may also notice that you experience fewer outbreaks or no outbreaks and that any future outbreaks are much less severe.

  • Sex

    You should steer clear of sex when you have visible cold sores, even if you’re taking valaciclovir. The herpes viruses that cause cold sores are very contagious, and they can be passed to sexual partners easily.

  • Storage

    You should always keep valaciclovir in its packaging and in a cool, dry place (below 30°C), and out of sight and reach of children.

The Comparison

VALACICLOVIR
VS VALTREX

VALACICLOVIR
VALTREX
ACICLOVIR OR FAMCICLOVIR
What it is
Generic name of the drug
Brand name from GlaxoSmithKline
Other available treatments
Active ingredient
Valaciclovir
Valaciclovir
Aciclovir or famciclovir
How often
Twice a day to treat an outbreak
Twice a day to treat an outbreak
Work in a similar way
Effectiveness
The medication is the same
The medication is the same
The same effectiveness
Side effects
Less severe side effects reported
Less severe side effects reported
Similar side effects

RELATED TREATMENTS.

Real medication. Real doctors. No inflated prices. Just results.

Valtrex tablet in an astronaut glove

Valtrex

(valaciclovir)

Branded valaciclovir. An antiviral tablet that stops the herpes virus copying itself, clearing outbreaks faster, and can be taken daily to help prevent them.

Wegovy tablet in an astronaut glove
New — MHRA approved June 2026

Wegovy Tablets

(oral semaglutide)

New for 2026. The UK's first once-daily GLP-1 weight loss tablet, MHRA-approved in June 2026. The same active ingredient as the Wegovy injection, with comparable weight loss in trials — no needles required.

Viagra tablet in an astronaut glove

Viagra

(sildenafil)

The original erectile dysfunction tablet. Taken around an hour before sex, sildenafil helps you get and keep an erection when you are sexually aroused.

Finasteride tablet in an astronaut glove

Finasteride

(generic Propecia)

A once-daily tablet medically proven to treat male pattern hair loss. The same active ingredient as Propecia, it helps stop hair loss and regrow hair.

Price includes medication only, if prescribed. An active FromMars membership is required and billed separately. Membership does not include or guarantee a prescription; medication is not available without a membership.

Drug Interactions

Valaciclovir Interactions

  • Medicines That Interact

    The following medications can interact with valaciclovir. Tell our doctors if you are taking any of these, or if you plan to: aminoglycosides, aprotinin, bictegravir, ciclosporin, cimetidine, cobicistat, colchicine, darunavir, doravirine, efavirenz, elvitegravir, emtricitabine, entecavir, foscarnet, fosphenytoin, hyaluronidase, iodinated contrast media, immune globulin, lamivudine, measles, mumps, and rubella live vaccines, methotrexate, mycophenolate, organoplatinum compounds, pentamidine, phenytoin, probenecid, recombinant, rilpivirine, tacrolimus, talimogene laherparepvec, telbivudine, tenofovir, tenofovir alafenamide, tenofovir disoproxil fumarate, varicella-zoster virus vaccine.

  • Other Medications

    Inform our doctors if you are taking, or plan to take, any other medications or herbal treatments at the same time as valaciclovir. Especially the medications listed above, and any treatments for shingles, any medicines that affect the kidneys, or any treatments to help after having an organ transplant.

  • Alcohol

    There are no known interactions between valaciclovir and alcohol.

WARNINGS

Who Shouldn’t Use Valaciclovir?

  • NOT UNDER THE AGE OF 12

    Children under the age of 12 shouldn’t take valaciclovir.

  • NOT IF YOU ARE ALLERGIC TO VALACICLOVIR OR ACICLOVIR

    Adults shouldn’t take it if they are allergic to valaciclovir or acyclovir, or any of the other ingredients in the medication (see the leaflet in the Valaciclovir packaging for a full list of ingredients).

  • CHECK WITH OUR DOCTORS IF YOU ARE OVER 65

    If you are over 65, have kidney or liver problems, or a weak immune system, make sure you check with our doctors before you take it.

  • CHECK WITH OUR DOCTORS IF YOU ARE PREGNANT OR BREASTFEEDING

    Check with our doctors if you are pregnant or breastfeeding.

  • DRINK PLENTY OF WATER

    Whilst taking valaciclovir it is important to drink plenty of water to stop yourself from becoming dehydrated and causing any damage to your kidneys.

Lifestyle

Getting the Most From Treatment

It’s important to always take it in just the way detailed by our doctors. A few things to keep in mind while you do:

  1. 01

    Driving and using machines

    It’s recommended not to drive or to use machinery when taking valaciclovir until you’re sure you can do so safely, as there are side effects which can impact your ability to do both of these things.

  2. 02

    Sunlight

    Valaciclovir can make you more sensitive to sunlight and increase your risk of sunburn. You should apply sunscreen when using this medication.

  3. 03

    Expiry dates

    Don’t use the medicine after the expiry date on the box. The expiry date refers to the last day of the month.

  4. 04

    Disposal

    If you have expired medicine, don’t throw it out with household waste or flush it down the sink or toilet, as the medication can cause environmental harm. Take expired medications to your local pharmacy so that they can be disposed of safely.

Suppression Treatment

Daily Suppression Treatment

FROM MARS provides valaciclovir as a daily preventative treatment for patients who have already been diagnosed with herpes and had a specific number of outbreaks, to help lessen the frequency of outbreaks and reduce the risk of transmitting the virus to partners.

This daily suppression treatment should result in fewer or even no outbreaks. If you do experience an outbreak, your symptoms should be much less severe.

Ask Our Doctors

FROM MARS offers valaciclovir as a suppression treatment, contact our doctors to find out more.

Houston,
we have answers.

Pricing

How much does valaciclovir cost?

  • Free doctor consultation
  • Licensed pharmacy & UK-licensed doctors
  • Treatment plan from our doctors within 2 hours
  • Free discreet delivery, next day
  • Unlimited secure messages to your doctor

READY TO START?

GET VALACICLOVIR
TODAY

Valaciclovir is prescribed online with a free doctor consultation. FROM MARS is a registered UK pharmacy, start your online consultation here.