• Shortens outbreaks when taken at the first sign of symptoms
  • Eases pain, itching, and blisters during flare-ups
  • Can be taken long-term to help prevent frequent or severe recurrences

How it works?

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Overview

Struggling with the pain and discomfort of a genital herpes outbreak? Aciclovir Tablets are a trusted first-line antiviral treatment that help to ease symptoms, speed up healing, and reduce the severity of future flare-ups.

By stopping the herpes simplex virus (HSV) from multiplying, Aciclovir helps blisters heal faster and prevents the outbreak from spreading. Many patients find that starting treatment at the first signs of tingling or discomfort makes outbreaks shorter and more manageable.

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


What is Aciclovir 


Aciclovir Tablets are a reliable and widely prescribed treatment for genital herpes.
They work by stopping the herpes simplex virus (HSV) from multiplying, which helps your immune system take control of the outbreak and speeds up recovery.

Taken at the first signs of symptoms, Aciclovir can:

  • Shorten the duration of an active outbreak
  • Reduce pain, burning, and discomfort
  • Help blisters heal faster and minimise inflammation
  • Lower the risk of future flare-ups when used long-term as suppressive treatment


Aciclovir is a trusted option for both first-time and recurring outbreaks — offering relief, control, and peace of mind.

Directions

  • Always take as prescribed by your clinician.
  • For an outbreak, the usual dose is 400mg three times daily for 5 days.
  • For suppressive therapy (frequent outbreaks), lower daily doses may be prescribed.
  • Swallow the tablets whole with water, with or without food.
  • Begin treatment as soon as the first symptoms appear for the best results.

Side Effects

Most people tolerate Aciclovir well, and side effects are usually mild and short-lived. However, like all medicines, it can occasionally cause unwanted effects.

Common (may affect up to 1 in 10 people):

  • Nausea or stomach upset – taking Aciclovir with food may help reduce this.
  • Headache – usually mild and temporary.
  • Diarrhoea – stay hydrated and speak to your doctor if persistent.
  • Tiredness – some people feel more fatigued during treatment.


Less common but serious (seek medical advice):

  • Allergic reaction – symptoms include rash, itching, swelling, or difficulty breathing.
  • Kidney problems – more likely if dehydrated or taking other medications that affect the kidneys.
  • Confusion or dizziness – rare, but more likely in older adults or people with kidney issues.


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 take Aciclovir if you:

  • Are allergic to aciclovir, valaciclovir, or any ingredients in the tablets


Other cautions:

  • Drink plenty of fluids while taking this medicine
  • Tell your prescriber about other medicines you’re using
  • Pregnant or breastfeeding? Use only under medical supervision
  • People with kidney problems may need dose adjustments

FAQ's

Does Aciclovir cure herpes?
No — there is currently no cure for herpes, but Aciclovir controls outbreaks and reduces symptoms.

How quickly does Aciclovir work?
When taken early, it can shorten outbreaks by around 1–2 days and make them less painful.

Can I take Aciclovir every day?
Yes, in lower doses, Aciclovir can be prescribed as suppressive therapy for people with frequent outbreaks.

Is Aciclovir safe for long-term use?
Yes — it is often used safely for months or years in those with recurrent herpes.

Can I still pass herpes on while taking Aciclovir?
Yes — antivirals reduce but do not eliminate the risk of transmission. Using condoms and avoiding sex during outbreaks provides extra protection.

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