Aciclovir Tablets

Order Aciclovir (Zovirax) for a quick and effective genital herpes treatment

Aciclovir tablets are an antiviral medication that is used to treat genital herpes outbreaks. It also works well against cold sores and it can be applied as a longer-term preventative treatment.

Our prices

Strength Quantity Price Stock
400mg15 tablets£14.99In Stock
400mg30 tablets£19.99In Stock
400mg45 tablets£23.99In Stock
400mg168 tablets£34.99In Stock
Prices exclude a prescription fee. This treatment requires a quick online consultation,
which a doctor will review to determine if a prescription is appropriate.

Safe and discreet

  • Safe and regulated treatments
  • 100% discreet and confidential
  • UK qualified doctors
  • Fully registered UK pharmacy


What is Aciclovir?

Aciclovir is an antiviral medication used to treat infection caused by the herpes virus, including cold sores, genital herpes, chicken pox and shingles. It is available on prescription as an oral medication, or as a topical cream which can be bought over the counter, prescription-free. 

Aciclovir for prevention

People experiencing recurrent outbreaks of genital herpes or cold sores may chose to take Aciclovir tablets over a period of 6 to 12 months in a preventative capacity.

Am I still contagious when taking Aciclovir?

The herpes virus is contagious as long as symptoms of infection are present. It is best to avoid sex completely if you are experiencing symptoms of genital herpes.

How long does it take for Aciclovir to work?

Aciclovir is not a cure, but it does stop the virus from spreading, allowing symptoms to heal. Antiviral medication for genital herpes should be taken within 5 days of symptoms presenting and can shorten an outbreak period by 1 to 2 days. 


Active ingredients

The active ingredient is aciclovir - an antiviral agent.

Inactive ingredients

The inactive ingredients of Aciclovir tablets are: magnesium stearate, microcrystalline cellulose, sodium starch glycollate, pregelatinised starch and colloidal anhydrous silica.

Please Note: The inactive ingredients used can be different for different brands of generic medication.


How to take Aciclovir

To repress herpes outbreaks, 200mg tablets of Aciclovir tablets should be taken four times a day for the duration of the course. The prescribing doctor may temporarily stop your medication every 6-12 months as required. 

Aciclovir dosage

These tablets contain 200mg of Aciclovir, this strength is used for the suppression of the herpes virus. Usually, a doctor will prescribe one 200mg tablet four times a day to reduce herpes outbreaks. 

Is there a dispersible Aciclovir available?

If you struggle to swallow Aciclovir tablets, they can be dispersed in a glass of water. One 200mg tablet should be dispersed in at least 50ml of water and swallowed. This may be a more appropriate when administering the medication to small children.

Can Aciclovir tablets be split or crushed?

Your doctor may prescribe Aciclovir tablets if topical treatment is not sufficient for your symptoms. If you struggle to swallow the tables, they can be crushed and dispersed in water. One 200mg tablet should be dissolved in at least 50ml of water.

Side Effects

Aciclovir side effects

Common side effects of Aciclovir tablets are:

  • Stomach pain
  • Diarrhoea
  • Tiredness
  • Headache
  • Nausea
  • Sensitivity to light
  • Rash
  • Vomiting
  • Itching
  • Hives

Rare side effects of Aciclovir tablets are:

  • Anaemia (iron deficiency)
  • Confusion
  • Dizziness
  • Kidney problems
  • Breathing difficulties
  • Neurological problems
  • Convulsions
  • Drowsiness
  • Hallucinations
  • Jaundice
  • Changes in the blood

If you experience any severe side effects or symptoms of an allergic reaction (breathing difficulties, itching, hives, rash) you should seek immediate medical attention. 
If you experience any prolonged side effects you should speak to the prescribing doctor.


You should not use Aciclovir if you are allergic to Aciclovir or Valaciclovir. If you are taking any other medication, or if you are pregnant or breastfeeding, you should inform the prescribing doctor.

Drug interactions

You should inform your doctor or pharmacist if you are taking, have taken or are planning on taking any other medications, including over the counter or prescription-free medications. 

Aciclovir and pregnancy/breastfeeding

Aciclovir is not recommended for women during pregnancy. If you are pregnant, or if there is a chance you may be pregnant, you should disclose this to the prescribing doctor. 

Aciclovir, has been found to pass into breastmilk, although it is not thought of as harmful to a nursing infant. Speak to your doctor for advice before beginning treatment.

Treatment Options

Aciclovir tablets vs Aciclovir cream

Aciclovir can be used both as a topical cream - which is available to buy over the counte -, or as an oral medication - which is only available on prescription. Aciclovir cream is usually sufficient treatment for cold sores, but should not be used inside the vagina, mouth or eyes. For more serious outbreaks of herpes infection, such as genital herpes, or for preventing chronic outbreaks, your doctor may prescribe Aciclovir tablets for a period of time. 

Non-prescription alternatives

Use of non-prescription Aciclovir cream can help treat the irritation caused by genital herpes, as can the following measures which you can take as home:

  • Gently cleanse the area with warm salt water to help prevent further infection
  • Apply an ice pack wrapped in a flannel to the area, which can help soothe the burning sensation. Never apply an ice pack directly to the area.
  • Before urinating, apply a mild local anaesthetic or vaseline to ease burning. You can also try pouring warm water over your genitals whilst urinating.
  • Wash your hands regularly with soap and hot water, particularly before and after applying Aciclovir cream to the affected area. 
  • Avoid wearing tight clothing, and instead choose loose fitting clothes such as skirts and loose trousers. 
  • Avoid having sex until symptoms have cleared completely.
  • If you think you might have genital herpes, you should get tested as soon as possible.


Is Aciclovir an antibiotic?

Aciclovir is not an antibiotic. Antibiotics are used to treat bacterial infections. Herpes is a viral infection, therefore Aciclovir is an antiviral medication. 

Will Aciclovir affect a drug test?

There is some evidence that taking Aciclovir can interfere in a drug tests, including urine tests. However, this depends on the type of test and what you are being tested for. Speak to your doctor for more information if you are worried about this issue.

Is Aciclovir addictive?

Aciclovir is not considered to be addictive, but you should take care not to exceed the stated dose.

Can Aciclovir treat HPV?

Infection with HPV can cause genital herpes. Aciclovir tablets can be used to treat symptoms, but it is vital to be tested for infection in any case. HPV can lead to much more serious complications, such as cervical cancer. Girls aged 12-13 are offered free vaccinations against HPV by the NHS, and women aged 35-64 are offered cervical screening to check for abnormal cells in the cervix. 

Can Aciclovir treat shingles?

Aciclovir can be used to treat shingles, which is caused by the herpes zoster virus. For treating shingles, Aciclovir is most effective in tablet form and helps slow down the progress of the shingles rash if taken within the first 72 hours of experiencing symptoms. 

Prices from:

Start your consultation now

We’re a fully regulated pharmacy, with qualified doctors and happy customers


Quick and discreet

Very good efficient service. No problems. I recommend Dr Felix highly.


What is your gender?

  • Male
  • Female

Quick and discreet

Easy to use website. A straightforward online consultation with a quick response back. Choice of products for your condition , all with clear descriptions and prices. And an amazing super fast dispatch/delivery. I found treatment for a minor problem in 2 days, sure beats trying to get an bob urgent appointment with my local surgery! Thank you all.