Aciclovir 400mg Tablets

Antiviral Cold Sore Treatment

Aciclovir 400mg Tablets
Price Checker
£17.99
Includes FREE private prescription
Truck icon Free shipping on all orders over £50

Receive it:
Order within:

  • Thumbs up icon MHRA-approved medication
  • Heart icon Join over 1.6 million customers
  • Lock and shield icon Private and confidential
  • Lightning fast icon Discreet next day delivery
Cost-effective anti-viral treatment for outbreaks of cold sores.
Compeed Cold Sore Discreet Healing Patch
Compeed Cold Sore Patch Only £6.49! Add to Cart
Need Genital Herpes Treatment?

Effectively treat Genital Herpes (HSV-2) with Aciclovir.

Aciclovir forTreat Genital Herpes  

Aciclovir

What is Aciclovir and how does it treat cold sores?

Aciclovir is an antiviral medication used to treat the herpes simplex virus. It stops the spreading of the herpes virus in the body by interrupting the process of virus replication, thereby reducing the duration of the infection. It is not a cure for these infections, as the virus continues to live in the body even after an outbreak but Aciclovir reduces the severity and length of the outbreak.

How do I take Aciclovir?

Aciclovir should be swallowed with water three times a day for 5 days. The treatment is most effective when you use it at the first signs of outbreak.

How effective is Aciclovir?

If Aciclovir taken as soon as a herpes outbreak has begun, Aciclovir can reduce the duration and severity of the outbreak. It can also suppress recurring outbreaks by 80%.

How fast does it work?

How quick and well Aciclovir work will depend on the severity of your symptoms and how soon you notice the symptoms before starting treatment. As soon as you start to notice the symptoms, it is best to start taking Aciclovir. You should consult with your doctor as soon as you spot an outbreak.

Do I need to seek medical advice before taking Aciclovir?

If you are pregnant, breastfeeding, elderly or suffer from kidney problems it is best to seek medical advice before taking Aciclovir.

 

Cold Sore Treatment

What are cold sores and how do you get them?

Cold sores are blisters which occur on the mouth and lips caused by the herpes simplex virus. It is caught when you come into contact with people with the infection. The virus usually remains dormant under the skin but often when your immune system weakens through stress or illness, the virus will reactivate.

Herpes - Herpes is the name given to a family of viral infectious diseases. The most common virus within this family is Herpes Simplex Virus (HSV), the cause of oral and genital herpes. Symptoms include:

  • Itching
  • Soreness
  • Tingling
  • Red bumps around the mouth and lips, which develop into painful crusty sores

What do cold sores look like?

Cold sores develop in different stages:

  1. Tingling, itching or burning sensation.
  2. Small fluid blister(s) start to form.
  3. The blister will fill with fluid and bust.
  4. The scab formed will slowly heal within the next few days.

What triggers cold sores to appear?

Common triggers include:

  • Infection (e.g. cold or flu)
  • Stress
  • High fever
  • Injury to the lip or mouth
  • Being tired/exhausted
  • Hormonal changes
  • Exposure to sunlight

Once you’ve been exposed to a cold sore, the likelihood of it recurring is higher, but looking after your health and knowing what your cold sore triggers are, you will find it easier to avoid future outbreaks.

Are cold sores contagious?

The herpes simplex virus which cause cold sores are extremely contagious from the moment you first feel the tingling sensation until the time it has healed.

Do’s/Don’ts of having a cold sore:

  • Drink plenty of fluids to avoid dehydration
  • Wash your hands before and after applying the cream
  • Use lip balm with SPF 15 or above
  • Eat cool, soft foods
  • Take painkillers to ease pain and swelling
  • Do not touch your cold sore
  • Do not kiss anyone when you have a cold sore
  • Do not share anything you come into contact with (e.g. creams, cutlery, lipstick)
  • Do not eat salty, acidic food
  • Do not have oral sex until your cold sore has completely healed

 Information Leaflet

Always read the patient information leaflet before commencing treatment.

Important: We advise you to always read the patient information leaflet inside the medication box, as the generic medication may not always entirely match the patient information leaflet listed. Please contact us if you have any questions.

Written and reviewed by our qualified team

GPhC Number: 2088658

Ana Carolina Goncalves
Authored by: Ana Carolina Goncalves Superintendent
Pharmacist

GPhC Number: 2225869

Rehma Gill
Reviewed by: Rehma Gill Pharmacy
Manager

Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 14 Apr 2025

Aciclovir Reviews

Overall Rating
9.8 / 10
Ratings Distribution
5 stars
974
4 stars
62
3 stars
7
2 stars
2
1 star
7

Based on 1,052 independent customer reviews taken by Feefo, Google and Trustpilot.

Truspilot logo
Google logo
Feefo logo
"Excellent service & product"

Product Review:

Excellent customer service and product.

Service Review:

Excellent service & product! Highly recommended.

Review from: Trustpilot

TickVerified Buyer

"Pharmica "

Product Review:

Excellent way of stopping cold sores in their tracks at the sign of a tingle take one of these tablets and your cold sores won’t amount to much

Service Review:

Great service and delivery will definitely be using them again

Review from: Trustpilot

TickVerified Buyer

Product Review:

Very good online shop and easy to find item to buy. Good prices.
Quick delivery with options available.

Review from: Feefo

TickVerified Buyer

"Very straight forward and quick delivery"

Product Review:

Excellent

Service Review:

Very straight forward and quick delivery

Review from: Trustpilot

TickVerified Buyer

"Always fast delivery "

Product Review:

Struggled with cold sores for years and these help to stop the major flare up. Especially as I often get more than one at a time.

Service Review:

Always fast delivery. Great service 😉

Review from: Trustpilot

TickVerified Buyer

"Pharmica are amazing"

Product Review:

I have had the worst coldsore outbreaks since I was a baby. I sometimes get up to three at a time in times of ill health or stress. As soon as i feel the bump (i don’t get a tingle anymore as it’s been 20 years!) i begin taking the aciclovir. It helps it crust faster than using cymex alone. It reduces my cold sore longevity from two-three weeks (scabbing included) down to a matter of days.

Service Review:

Pharmica are amazing. They reviewed my order within a few hours of placing it and only two days later did I receive my medication. They are my go-to in a pinch.

Review from: Trustpilot

TickVerified Buyer

Product Review:

Really quick delivery keeps u updated on tracking. Tablets work quickly aswel.

Service Review:

Quick delivery also keeps u updated well with the tracking.

Review from: Feefo

TickVerified Buyer

"Did what it said on the box no cold…"

Product Review:

Never got any cold sores which is brilliant for me definitely be buying again

Service Review:

Did what it said on the box no cold sores which is brilliant for me

Review from: Trustpilot

TickVerified Buyer

"Ordered and received well"

Product Review:

It worked well

Service Review:

Ordered and received well

Review from: Trustpilot

TickVerified Buyer

Product Review:

Excellent service and a speedy delivery

Service Review:

Excellent

Review from: Feefo

TickVerified Buyer

Discreet service

Discreet Packaging

Your privacy is important to us. That’s why we’ve taken every step to ensure your order arrives in the most discreet way possible.

From start to finish, your purchase is handled with complete confidentiality. You’ll never see our brand name on your bank statement, bills or delivery papers.

All our parcels are sent in plain, unmarked packaging with no logos, no product descriptions and no indication of what’s inside.

Estimated delivery

Signed For 1st Class

£2.90 - Sunday 27 April

Collect from your Post Office

£3.95 - Sunday 27 April

Special Delivery 1pm Guaranteed

£5.95 - Sunday 27 April by 1pm

Special Delivery 9am Guaranteed

£13.95 - Sunday 27 April by 9am

Same Day Delivery

from £4.95 - Saturday 26 April

How does it work?

How it works - Consultation

Online consultation

Complete a short questionnaire to check your eligibility for treatment

Refer a friend step 1

Choose a treatment

Select the treatment or medication you need from leading brands

How it works - Delivery

Express delivery

Medication is dispensed and delivered to your home or work

Related articles

This guide details the best treatments to quickly and reliably get rid of cold sores and debunks common misconceptions regarding the treatment of cold sores.
This guide aims to help you in understanding the stages of cold sore development and their levels of contagiousness, as well as best cold sore treatment options that can reduce HSV-1 symptoms.
The herpes virus affects the majority of us, so join us as we clear up some of the most common herpes myths and misconceptions.
Anyone who has had a cold sore will agree that they are not pleasant. Not only are they visually unappealing, but the stigma surrounding cold sores can affect you from your dating to your professional life.