Aciclovir Tablets (400mg)

  • Used to treat and prevent recurring outbreaks of Herpes
  • Works by stopping the herpes virus from spreading
  • Helps clear the signs and symptoms of herpes and cold sores

Please note brand received may vary

Do you have a preference?
From As low as £18.99

Disclaimer: The prices displayed should only be used as a reference of our prices for this medicine. If you are approved for treatment, our prescribers will decide on a suitable treatment for you to jointly consider.

All-inclusive service

prescription included

Fast next day delivery

order before 2pm

UK registered pharmacy

and team of dispensers

About Aciclovir Tablets (400mg)
  1. What is Aciclovir?

    Aciclovir is an antiviral medication used in the treatment of a variety of conditions. It is a common cold sore treatment and is also used to treat genital herpes and other viruses.

    Depending on how you prefer to administer your medicine and what your ailment is, Aciclovir is available as a cream or tablet.

    You need a prescription to buy Aciclovir tablets. 

    What is Aciclovir used to treat?

    Aciclovir is commonly prescribed to treat and prevent a recurring attack of herpes, e.g. cold sores and genital herpes. It can also be used to protect those who suffer from low immune systems from contracting the herpes virus.

    Aciclovir will help to relieve the irritation, blisters and scabs caused by the herpes simplex virus (HSV).

    Doctors may also prescribe Aciclovir to treat shingles and chickenpox as they are also caused by the herpes virus, varicella-zoster. 

    Why is Aciclovir prescribed for genital herpes?

    If you start taking Aciclovir as soon as your symptoms appear, it will often work to clear them up within one or two days.

    Aciclovir has been clinically trialled and found to be an effective treatment for the herpes simplex virus. This treatment has been used for more than 30 years. 

    How does Aciclovir work?

    These tablets work by stopping the herpes virus from spreading by targetting the enzyme in the virus that helps HSV to grow. Doing this means the immune system is able to fight the virus.

    No medicine can remove this virus from your system, but antiviral medication like Aciclovir can help to treat individual cases of the likes of cold sores and genital herpes.

    Who can take Aciclovir?

    Aciclovir is considered a safe drug to take and can be used by both adults and children. However, it is not suitable for everyone. You should speak to your doctor about whether this medicine is right for you if you have any of the following:

    • You are allergic to Aciclovir or any of its ingredients
    • You suffer from kidney issues
    • You suffer from a nervous disorder
    • You have liver problems, liver disease or abnormal levels of salts in your blood
    • You suffer from breathing difficulties
    • You are over 65 years of age
    • You are pregnant, trying to conceive or are currently breastfeeding
    • You have a weakened immune system

    If you have a weakened immune system from conditions like HIV, AIDS or a bone marrow transplant, you should speak to your doctor about which type of Aciclovir treatment is the most suitable for you.

    Can you buy Aciclovir over the counter?

    Aciclovir tablets cannot be bought over the counter. You must have a prescription. However, if you are suffering from cold sores, the cream version is available from most pharmacies and supermarkets.

    Can you buy Aciclovir online in the UK?

    You can buy Aciclovir online from regulated pharmacies like Medicine Direct, but you will first need to have an online consultation. All you need to do is fill out a confidential questionnaire, where you will answer some questions about your medical history and your condition. These will be assessed by one of our doctors, pharmacists or prescribers to make sure Aciclovir is the right medication for you.

    As long as you order by 2pm, we can offer you next day delivery.

    Medicine Direct is fully regulated by the General Pharmaceutical Council (GPhC) and other official medical authorities.

    Aciclovir alternatives

    Valaciclovir is another medicine that can effectively battle against the herpes virus. This antiviral quickly converts to aciclovir when it has been ingested and will get to work in the same way.

    Generic valaciclovir and the branded version, Valtrex, can both be ordered from Medicine Direct after an online consultation.

    Aciclovir is also available as a cream, both on prescription and over the counter.

  2. Aciclovir Indiations and Dose

    Our pharmacists and prescribers follow NICE guidelines when prescribing Aciclovir.

    The average dose when treating genital herpes is to take one tablet five times a day.

    To prevent herpes from coming back, your doctor will likely prescribe you two tablets a day for between three and six months.

    See the patient information leaflet for full details on doses, including the recommended doses for children. Children should not take this medicine to treat shingles.

    If you suffer from kidney problems or are elderly, your doctor may lower your dose. Always take Aciclovir in the dose your doctor has prescribed.

    How to take Aciclovir

    These tablets can be taken with or without food.

    Swallow Aciclovir tablets whole with plenty of water, unless told otherwise by your doctor.

    Make sure you drink plenty of water during your time taking this medicine.

    You should wash your hands regularly while suffering from an HSV outbreak. Additionally, because this type of infection is contagious, take care to ensure that the infected areas of your body do not come into contact with others. You are advised to not have sex while being treated for genital herpes. If you do have sex, you should always use contraception.

  3. Side Effects of Aciclovir

    As is the case with all medicines, Aciclovir comes with the risk of certain side effects, although not everyone will suffer from them.

    Here are some of the most common side effects associated with taking Aciclovir tablets:

    • Feeling dizzy
    • Headaches
    • Diarrhoea
    • Skin being sensitive to sunlight
    • Feeling sick or being sick
    • Stomach pain
    • Feeling tired
    • Itching (skin reaction)
    • High temperature and feeling faint, particularly when you stand up
    • Rash

    The below side effects are very rare, affecting less than 1 in every 1,000 people who use Aciclovir tablets. Nonetheless, you should go back to your doctor if you notice any of the below symptoms while using the treatment:

    • You are having fits
    • You have a reduced number of red blood cells (anaemia)
    • You have a reduced number of white blood cells (leukopenia)
    • You feel weak
    • You have paralysis in parts or all over your body
    • You feel agitated or confused
    • You have hallucinations
    • You have a reduced number of blood platelets (thrombocytopenia)
    • You are shaking or have tremors
    • You fall unconscious
    • You have jaundice (yellowing skin or whites of the eyes)
    • You have kidney problems, urinating less frequently
    • You have lower back pain or pain above your hip
    • You have hepatitis (inflamed liver)
    • You have a lack of coordination or are unsteady on your feet

    Always read the patient information leaflet before taking any prescription tablets.

  4. Aciclovir Warnings and Drug Interactions

    As with all prescription treatments, Aciclovir may interact with other medicines. This may also make you more vulnerable to side effects.

    It is very important that you inform your doctor and pharmacist of any other medication you are already using before you start to take a new one. This includes both prescription and non-prescription medicine, herbal remedies, vitamins and supplements.

    In particular, you should make sure your doctor is aware if you are currently taking:

    • A medicine to treat stomach ulcers called cimetidine
    • Medicines to treat asthma called aminophylline or theophylline
    • A medicine to treat gout called probenecid
    • A prescription medicine given after organ transplants called mycophenolate mofetil

    There are various herbal medicines used to treat the likes of cold sores and genital herpes. You must inform your doctor if you are currently using any of these before you start to use Aciclovir.

    Because some of the common side effects associated with Aciclovir include feeling dizzy, stomach pain, having hallucinations or feeling tired, it is not advised that you drive or operate any machinery if you experience these effects. If you experience any of these side effects, you should not drive, ride a bike or operate machinery until you feel better. If these symptoms persist, go back and speak to your doctor.

    Pregnancy and breastfeeding

    Aciclovir is considered to be safe to take during pregnancy. If you experience regular breakouts, the doctor may recommend your taking Aciclovir during your pregnancy to prevent a possible breakout during childbirth, as this can pass the virus down to the newborn baby.

    We recommend speaking to your doctor, who will be able to explain the risks and benefits of taking acyclovir during pregnancy.

    Aciclovir is safe to use while breastfeeding. If you are taking Aciclovir tablets, some of the medication may make its way into breast milk, but the amount is considered too small to present any harm to your baby.

    It is important to speak to your doctor if you are currently breastfeeding and taking Aciclovir tablets.

    You can find additional information on the BUMPS website.

  5. Aciclovir Ingredients

    The main active ingredient within this medicine is: Aciclovir

    For a full list of the inactive ingredients, please read the Summary of Product Characteristics.

  6. How much does it cost to buy Aciclovir tablets online in the UK?

    Dose Quantity Buy Online UK Price
    Aciclovir 400mg tablets 1 outbreak (15 tablets) £18.99
    Aciclovir 400mg tablets 2 outbreaks (30 tablets) £24.99
    Aciclovir 400mg tablets 3 outbreaks (45 tablets) £29.99
    Aciclovir 400mg tablets 3-month suspension (168 tablets) £49.99
  7. What are aciclovir tablets used for?

    Aciclovir is an antiviral medicine that is used to treat cold sores caused by Herpes Simplex Virus

    Is Aciclovir an antibiotic?

    No, this medicine is an antiviral, which means it is used to treat viral infections. Antibiotics are used in the treatment of bacterial infections.

    How long does Aciclovir take to work?

    It will normally take a few days before your condition starts to improve. It is important to keep taking Aciclovir for as long as your doctor has told you.

    What should I do if I don’t get better?

    If you have taken Aciclovir tablets in accordance with your doctor’s instructions and do not feel better at the end of the course, tell your doctor. Your dose may be increased.

    Is it okay to have sex while taking Aciclovir?

    If you are taking this medicine to treat genital herpes, you should not have sex until all of the physical symptoms have cleared. The herpes virus is very contagious, so you should always wear a condom to have sex, even once the sores and blisters have healed. You should also avoid kissing and oral sex if you are suffering from a cold sore on your mouth.

    Can this medicine affect my contraception?

    Aciclovir has no effect on any type of contraception, including the morning-after pill. If you are sick or have severe diarrhoea for longer than one day while taking Aciclovir, you may not have complete contraceptive protection. Read the information that comes with your contraception for guidance on what to do if this happens.

    Are Aciclovir and Acyclovir the same thing?

    Yes, these two medicines are the same and are both used for the same conditions.

    Do I need to take Aciclovir with food?

    You can take this medicine with or without food. Taking it with food may reduce the risk of a stomach upset. You should always take Aciclovir tablets with a drink of water.

    Does Aciclovir damage your liver?

    Liver problems (hepatitis) have been reported as very rare side effects while taking Aciclovir. If you have any liver problems already, you should tell your doctor before you start taking this medicine.

    Can I prevent cold sores or herpes infections?

    Herpes can be triggered by certain factors, so you should try to avoid them. The following tactics can help to reduce the risk of outbreaks: Eating a healthy diet, getting enough sleep, reducing stress and avoiding strong sunlight and sunbeds.

    Does Aciclovir get rid of cold sores quicker?

    Yes, aciclovir will typically speed up the healing process and reduce the appearance of cold sores quicker than if they were left to clear up naturally.

Medically Reviewed bySonia Khan MPharm: 2076091

Updated on: 26/08/2021

This content has been written by our Superintendent Pharmacist Hussain Abdeh and has been medically reviewed by our Pharmacist Sonia Khan

Hussain Abdeh Superintendent Pharmacist at Medicine Direct

Hussain Abdeh
MPharm: 2211840

Pharmacist Independent Prescriber

How it works - get your medicine in 3 simple steps

  • 1 Choose your treatment Select the treatment or medication you need and answer a few questions online regarding your condition.
  • 2 Online consultation Our Independent Prescribers will review your questions and assess your suitability for the medication.
  • 3 Receive your delivery Your medication is dispensed and delivered directly to you from our UK based Pharmacy.

Related products

No Related guide Posts

Customers have rated us Excellent on trustpilot
We’re here to help

If you need any help, don't hesitate to get in touch, we would love to hear from you!

Copyright © 2022 Pharmacorp LTD. All rights reserved.