• Helps shorten outbreaks and speed up healing
  • Relieves pain, itching, and discomfort fast
  • Twice-daily dosing with proven, long-term protection

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Overview

Valtrex is the trusted branded antiviral for genital herpes — designed to ease outbreaks quickly, reduce pain, and lower the risk of transmission with the convenience of just twice-daily dosing.

Known worldwide for its reliability and effectiveness, Valtrex contains valaciclovir, which stops the herpes virus multiplying and helps blisters heal faster. For patients who want the reassurance of a well-recognised brand, Valtrex offers both peace of mind and proven clinical results.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.


What is Valtrex


Valtrex is the branded version of valaciclovir — a trusted antiviral treatment for genital herpes. Once inside the body, it converts into aciclovir, which stops the herpes virus from multiplying. This helps control outbreaks, reduce painful symptoms, and speed up healing.

Valtrex is commonly prescribed to:

  • Shorten the length and severity of active herpes outbreaks
  • Relieve symptoms like burning, itching, and soreness
  • Promote faster healing of blisters and sores
  • Prevent future flare-ups when taken daily as suppressive therap


With convenient twice-daily dosing, Valtrex offers reliable and clinically proven protection for people managing genital herpes.

Directions

  • Always follow your prescriber’s instructions.
  • For outbreaks, the typical dose is 500mg twice daily for 5–10 days.
  • For prevention of frequent flare-ups, your clinician may recommend a daily suppressive dose.
  • Swallow tablets whole with water, with or without food.
  • For best results, begin treatment as soon as the first symptoms appear.

Side Effects

Like all medicines, Valaciclovir can cause side effects, but most people tolerate it well. Side effects are usually mild and short-lived.

  • Tiredness – some people may feel slightly fatigued while on treatment.
  • Nausea or upset stomach – taking your dose with food may help reduce this.
  • Headache – often mild and manageable with hydration or simple pain relief.
  • Common (may affect up to 1 in 10 people):

 

Rare but serious (seek medical advice promptly):

  • Allergic reaction – signs include rash, swelling, or difficulty breathing.
  • Kidney problems – especially if dehydrated; drink plenty of fluids unless advised otherwise.
  • Confusion or dizziness – more likely in older adults or those with kidney conditions.

 

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet that comes with your medicine for full details. If you notice anything unusual or concerning, stop taking the medicine and seek medical advice promptly. In an emergency, call 999 or go to A&E.

Warnings

Do not use Valtrex if you:

  • Are allergic to valaciclovir, aciclovir, or any of the ingredients

 

Other cautions:

  • Stay hydrated while taking Valtrex
  • Speak to your clinician if you have kidney or liver problems (dose adjustments may be required)
  • Safe use during pregnancy or breastfeeding should be discussed with a healthcare professional
  • Tell your prescriber about all other medicines you’re taking

FAQ's

What’s the difference between Valtrex and generic Valaciclovir?
They contain the same active ingredient and work the same way. Valtrex is the branded version, which some patients prefer for reassurance and familiarity.

Does Valtrex cure herpes?
No — herpes cannot be cured, but Valtrex reduces the severity and duration of outbreaks and lowers recurrence rates.

Is Valtrex safe for long-term use?
Yes — it is often prescribed as suppressive therapy for people with frequent flare-ups.

How quickly does Valtrex work?
Starting treatment early can shorten outbreaks by 1–2 days and reduce pain.

Does Valtrex stop transmission completely?
No — while it reduces the risk, herpes can still be passed on. Condoms and avoiding sex during outbreaks provide extra protection.

Frequently asked questions
  • What is Valtrex (valaciclovir) and how does it treat genital herpes?

    Valtrex (valaciclovir) is an antiviral medicine used to treat genital herpes by slowing viral replication. This helps outbreaks heal more quickly and reduces discomfort. It is converted into aciclovir in the body but allows simpler dosing, which many people find easier to manage.

  • How fast does Valtrex work during an outbreak?

    Valtrex often begins easing pain and soreness within a couple of days, although full healing takes longer. Starting treatment early, ideally at the first sign of tingling, usually leads to the quickest recovery. Early use also helps reduce the amount of virus shed.

  • What dose of Valtrex is used for genital herpes?

    For outbreaks, Valtrex is usually taken as 500 mg twice daily for several days. The exact course depends on whether it is a first outbreak or a recurrence. Taking tablets at evenly spaced times helps maintain strong antiviral activity for faster healing.

  • Can Valtrex help prevent frequent genital herpes outbreaks?

    Yes. Valtrex can be taken once daily as suppressive therapy to reduce how often outbreaks occur. Many people experience much fewer flare-ups and find it improves confidence and comfort in relationships. It can also lower transmission risk.

  • What are the common side effects of Valtrex?

    Valtrex is usually well tolerated. Possible side effects include headache, nausea, stomach upset and tiredness, which are generally mild and settle quickly. Serious reactions are rare. Staying hydrated can help your body manage the medicine comfortably.

  • Is Valtrex safe for most people to use?

    Yes. Most adults can use Valtrex safely, but your prescriber will consider kidney health, other medicines and pregnancy or breastfeeding. Some people may respond better to aciclovir depending on dosing needs. A clinician will help choose the best option.

  • What should I do if I forget to take a dose of Valtrex?

    Take your missed dose as soon as you remember unless it is close to the next scheduled dose. Do not take two doses together. Keeping doses evenly spaced helps the medicine remain effective throughout your outbreak.

  • Why do some people prefer Valtrex over generic valaciclovir?

    Some people choose Valtrex because it is the original brand and they feel confident using a branded product. Others find the tablets easier to swallow or report a better personal response. Both versions contain valaciclovir and work the same way, so choice often comes down to preference.

  • Does Valtrex reduce viral shedding more effectively?

    Valtrex can help lower viral shedding, especially when taken daily as suppression. This reduces the chance of passing herpes to partners even when no symptoms are present. It is often chosen for couples where reducing transmission risk is a priority.

  • Can I use Valtrex if I get very painful or long outbreaks?

    Yes. Valtrex is commonly recommended for people who have intense or slow-healing outbreaks. Starting treatment quickly can shorten the episode and ease pain. If outbreaks remain very severe, your clinician may consider a higher dose or a longer treatment course.

  • Is Valtrex suitable for suppressing outbreaks in new relationships?

    Suppressive treatment with Valtrex can help reduce the emotional stress of new relationships by lowering recurrence frequency and decreasing transmission risk. Many people use daily Valtrex during the first year of dating or when concerns about outbreaks are high.

  • Can I drink alcohol while taking Valtrex?

    Light or moderate drinking is usually fine, but avoid heavy alcohol intake as it can worsen fatigue or slow healing. Staying well hydrated helps your body manage Valtrex comfortably. If alcohol makes symptoms worse, it is best to reduce or avoid it.

  • Can Valtrex be used safely alongside other antiviral medicines?

    Valtrex should not usually be combined with similar antivirals unless a clinician specifically advises it. Your prescriber will check all your medicines to avoid unnecessary duplication and ensure Valtrex remains safe and effective.

  • How should I take Valtrex if I struggle swallowing tablets?

    If swallowing tablets is difficult, Valtrex can sometimes be dispersed in water before taking it. Drink the mixture immediately to ensure the full dose is consumed. If swallowing problems persist, speak with a clinician about alternative options.

  • What should I do if outbreaks continue despite taking Valtrex?

    If you still get frequent outbreaks, your clinician may adjust your dose, extend your course or recommend daily suppression. Stress, illness or missed doses can affect control. Reviewing triggers and ensuring early treatment often improves results.

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