• Valcilovir anti-viral tablets are a Cost-effective treatment for Fast, Effective relief from current and future outbreaks of herpes.
  • Although it cost slightly more than aciclovir ,there are normally fewer side effects and it has a more convenient dosing regiment and only needs to be taken twice a day.





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What is Valaciclovir?

Valaciclovir belongs to a group of medicines called antivirals. It works by killing or stopping the growth of viruses called herpes simplex (HSV), varicella zoster (VZV) and cytomegalovirus (CMV).

Valaciclovir can be used to treat HSV infections of the skin and genital herpes (in adults and adolescents over 12 years old). It is also used to help prevent these infections from returning.

For more information about Genital herpes, click here.

How do you take Valaciclovir?

Treatment of HSV infections of the skin and genitalherpes The usual dose is 500mg twice a day. For the first infection you should take Valaciclovir tablets for five days or for up to ten days if your doctor tells you to. For recurrent infection the duration of treatment is normally 3-5 days.

Helping to prevent HSV infections from returning after you have had them The usual dose is 250mg twice a day. Taking one 250mg tablet twice a day may give benefit to some people with frequent recurrences (instead of one 500mg tablet once a day). You should take Valaciclovir tablets until your doctor tells you to stop. If you suffer from six or more outbreaks a year suppression treatment may be suitable for you. Suppression treatment is taken everyday and helps to reduce recurrent outbreaks by 70-80% and that outbreaks are milder and shorter than without suppression treatment.

Prevent passing genital herpes on to others

The sooner you start taking Valaciclovir after the herpes symptoms start, the better it will work. You can pass on the herpes simplex virus to other people, even if the herpes is no longer visible. you should still practice safe sex, including the use of condoms. This is important to prevent you passing the infection on to others. If you have sores or blisters, you should not have sex at all until they have cleared up completely.

See our other genital herpes treatments here.

Additional information

Weight N/A


Therapy for 3 months (84 Tablets), 10 Tablets (Treats 1 Outbreak), 20 Tablets (Treats 2 Outbreaks), 30 Tablets (Treats 3 Outbreaks)

Genital herpes

Genital herpes is a sexually transmitted infection (STI) passed on through vaginal, anal and oral sex.


Symptoms clear up on their own but can come back. Go to a sexual health clinic as soon as possible if you have: small blisters that burst to leave red, open sores around your genitals, anus, thighs or buttocks tingling, burning or itching around your genitals pain when you pee in women, vaginal discharge that’s not usual for you Go even if you haven’t had sex for a long time, as blisters can take months or years to appear.

Symptoms might not appear for weeks or even years after you’re infected with the herpes virus.

If you have genital herpes, your previous sexual partners should get tested.

Treatment for genital herpes

There’s no cure. Symptoms clear up by themselves but the blisters can come back (an outbreak or recurrence). Treatment from a sexual health clinic can help.

Treatment the first time you have genital herpes

You may be prescribed:

antiviral medicine to stop the symptoms getting worse – you need to start taking this within 5 days of the symptoms appearing cream for the pain If you’ve had symptoms for more than 5 days before you go to a sexual health clinic, you can still get tested to find out the cause.

Treatment if the blisters come back

Go to your GP or a sexual health clinic if you’ve been diagnosed with genital herpes and need treatment for an outbreak.

Antiviral medicine may help shorten an outbreak by 1 or 2 days, if you start taking it as soon as symptoms appear. But outbreaks usually settle by themselves, so you may not need treatment.

Recurrent outbreaks are usually milder than the first episode of genital herpes. Over time, outbreaks tend to happen less often and be less severe. Some people never have outbreaks.

Some people who have more than 6 outbreaks in a year may benefit from taking antiviral medicine for 6 to 12 months. If you still have outbreaks of genital herpes during this time, you may be referred to a specialist.

How to deal with outbreaks yourself

If you’ve been diagnosed with genital herpes and you’re having an outbreak:


keep the area clean using plain or salt water to prevent blisters becoming infected apply an ice pack wrapped in a flannel to soothe pain apply petroleum jelly (such as Vaseline) or painkilling cream (such as 5% lidocaine) to reduce pain when you pee wash your hands before and after applying cream or jelly pee while pouring water over your genitals to ease the pain


do not wear tight clothing that may irritate blisters or sores do not put ice directly on the skin do not touch your blisters or sores unless you’re applying cream do not have vaginal, anal or oral sex until the sores have gone away How genital herpes is passed on Genital herpes is very easy to pass on (contagious) from the first tingling or itching of a new outbreak (before any blisters appear) to when sores have fully healed.

You can get genital herpes:

from skin-to-skin contact with the infected area – including vaginal, anal and oral sex when there are no visible sores or blisters if a cold sore touches your genitals by transferring the infection on fingers from someone else to your genitals by sharing sex toys with someone who has herpes You can’t get genital herpes: from objects such as towels, cutlery or cups – the virus dies very quickly when away from your skin Protecting against genital herpes

You can reduce the chances of passing herpes on by:

using a condom every time you have vaginal, anal or oral sex – but herpes can still be passed on if the condom doesn’t cover the infected area avoiding vaginal, anal or oral sex if you or your partner has blisters or sores, or a tingle or itch that means an outbreak is coming not sharing sex toys – if you do, wash them and put a condom on them

Why genital herpes comes back

Genital herpes is caused by a virus called herpes simplex. Once you have the virus, it stays in your body.

It won’t spread in your body to cause blisters elsewhere. It stays in a nearby nerve and causes blisters in the same area.

If you can, avoid things that trigger your symptoms.

Side Effects

What are the common side effects of Valaciclovir?

The most common side effects of Valaciclovir include:

– Dizziness and headache – Nausea and vomiting – Diarrhea and stomach pain

For additional, less common, side effects, see the patient information leaflet.

Further Information

For the patient information leaflet