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Aciclovir Tablets 400mg
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Delivered discreetly Aciclovir Tablets 400mg
Buy Aciclovir Online
You can buy aciclovir tablets online by completing a short medical questionnaire. One of our pharmacists will screen the answers, to make sure that treatment is safe for you to take. All purchases are shipped from our UK pharmacy, with next-day delivery options available.
Aciclovir Prices
| Name & Dosage | x15 Tablets | x25 Tablets | x30 Tablets | x45 Tablets | x50 Tablets | x75 Tablets | x180 Tablets |
|---|---|---|---|---|---|---|---|
| Aciclovir 200mg Tablets | £9.89 £8.41 | £19.49 £16.57 | £23.89 £20.31 | ||||
| Aciclovir 400mg Tablets | £9.89 £8.41 | £19.49 £16.57 | £23.89 £20.31 | £43.95 £37.36 |
Making use of discount code WINTER25
Summary For Aciclovir Tablets 400mg
| Medication class | Oral antiviral |
|---|---|
| Mechanism of action | Stops the virus from replicating, reducing symptoms |
| Active ingredient | Aciclovir |
| Strength | 400mg |
| Effective within | 24-48 hours |
| Dosage instructions | One tablet three times a day (outbreak treatment) One tablet twice a day (suppression treatment) |
| Manufacturer | Actavis, Ranbaxy, Crescent, Wockhardt, Milpharm, Teva |
| Use with alcohol | In moderation |
About Aciclovir Tablets
Key points
- Aciclovir tablets can be used to reduce the length and severity of an outbreak.
- Aciclovir tablets can also be taken long-term, to reduce the number of outbreaks in those that experience herpes outbreaks on a regular basis.
- It can take 1-2 days for aciclovir to start working.
What is aciclovir used for?
Aciclovir is an antiviral medication, used to treat infections which are caused by the herpes virus. These include:
- Genital herpes
- Cold sores
- Shingles
- Chickenpox
- Eye infections
Genital herpes medication
Aciclovir tablets are an effective treatment for genital herpes. They help to improve symptoms and can also be used long-term to prevent outbreaks.
How does it work?
Aciclovir works by changing the DNA of the herpes simplex virus, so that virus is unable to multiply and infect more cells. This allows the immune system to bring the virus under control, resulting in fewer and milder symptoms that disappear faster than they would without treatment.
Important note: Aciclovir is not a cure for herpes. It but can help sores to heal faster and prevent new sores from developing.
How long does it take to work?
You should start to notice symptoms ease within 2 days of starting medication.
Aciclovir Dosage Instructions
Genital herpes outbreak dose
Take one aciclovir 400mg tablet, three times a day for 5 days
Genital herpes suppression dose
Take one aciclovir 400mg tablet, two times a day. You should review your treatment after 6-12 months to see if the number of outbreaks has reduced.
Important note:
- Take one tablet with a glass of water. If you have difficulty swallowing tablets, they can be dispersed in water.
- Space doses evenly throughout the day.
- If you miss a dose, take it as soon as you remember unless it is nearly time for your next dose—do not take a double dose.
- Complete the full course of treatment, even if symptoms improve.
- Drink plenty of water during treatment to stay hydrated and reduce strain on your kidneys.
Aciclovir Side Effects
Side effects are usually mild and disappear as you adjust to taking the medication.
Side effects of aciclovir tablets include:
Common side effects (affecting up to 10% of users):
- Dizziness
- Headache
- Nausea
- Diarrhoea
- Stomach ache
- Skin sensitivity after light exposure
- Itchiness
- Fatigue
- High temperature
- Feeling faint
Uncommon side effects (affecting up to 1% of users):
- Hair loss
For a full list of side effects, refer to the patient information leaflet.
Stop taking aciclovir tablets and seek urgent medical attention if you experience signs of an allergic reaction such as:
- Rash or very itchy skin
- Swelling of the face, mouth, lips, tongue, eyes, throat, or any other part of your body
- Difficulty breathing or shortness of breath
- Collapse
Always report any side effects to your doctor or pharmacist.
Aciclovir Warnings
You should not take aciclovir if you:
- Are over 65 years of age
- You have kidney problems
- You have a condition that affect the immune system such as HIV
- You have a condition which affects the nervous system
- You have any allergies to aciclovir or its ingredients
Aciclovir Interactions
You should avoid the following medication when taking aciclovir:
- Cimetidine – used to treat stomach ulcers
- Probenecid – used to treat gout
- Mycophenolate mofetil – used to stop the body rejecting an organ after a transplant
- Theophylline and aminophylline – used to treat asthma and breathing conditions
Aciclovir and alcohol
There is no direct interaction between aciclovir and alcohol, so you can drink in moderation whilst using treatment. However, if you are experiencing side effects, limit your consumption, as alcohol may intensify side effects of aciclovir, such as headaches, nausea, dizziness, and sleepiness.
Excess alcohol can reduce the function of your immune system. To get the most out of your treatment, alcohol consumption should be limited.
Aciclovir and Pregnancy/Breastfeeding
Aciclovir during pregnancy
It is safe to take aciclovir tablets during pregnancy, but this should be done under the supervision of your doctor. It can be advised to take aciclovir four weeks before birth to prevent a genital herpes outbreak. This is to prevent the infection from being spread during birth.
If you have herpes and are pregnant, the risk of passing it onto your baby is very low, however, you should make your doctor aware so that you can discuss your options.
Aciclovir whilst breastfeeding
A small amount of aciclovir is present in breastmilk, and you should avoid taking it unless the benefits outweigh the risks.
You may still be eligible to use treatment, however, this is done under the supervision of your doctor.
Frequently Asked Questions
No, you cannot buy aciclovir tablets over the counter. You will need a prescription to buy aciclovir in the UK.
You can order aciclovir online from a registered pharmacy, such as Chemist Click. A pharmacist will assess your suitability through an online consultation and generate a prescription in-house if it is safe to do so. Your medication will be dispensed and dispatched to you in plain and discrete packaging.
Aciclovir cream is only licensed to treat cold sores (oral herpes), but not genital herpes.
Yes, aciclovir can be taken to treat shingles. The dose of aciclovir used to treat shingles is different to the dose used to treat genital herpes.
It can take 1-2 days for aciclovir tablets to work.
Yes, aciclovir is available on the NHS.
Yes, painkillers such as ibuprofen and paracetamol are safe to take alongside aciclovir tablets.
Yes, aciclovir is available in liquid form, however, it is more expensive than the tablets. Many forms of aciclovir tablets are dispersible.
Yes, but it is important to remember that it is still possible to pass the infection on to others. The chances of transmitting herpes to somebody else increases during an outbreak.
If you experience less than six outbreaks a year, your best option would be to use aciclovir each time you have an outbreak.
If you experience six or more episodes of genital herpes a year, you may wish to think about taking aciclovir as suppression therapy. This can reduce the number of outbreaks.
If you are experiencing less than six outbreaks a year, but you feel as though herpes is negatively affecting your mental health, you should speak to your doctor or pharmacist about using suppression therapy.
- According to clinical studies, both aciclovir and valaciclovir have similar results
- To treat an outbreak, aciclovir is taken three times a day, whereas valaciclovir is taken two times a day
- For suppression therapy, aciclovir is taken two times a day and valaciclovir is taken once a day
- Aciclovir is cheaper than valaciclovir
Product Reviews
product rated 4.8/5
Works very quickly
By Jane (via Reviews.io)
product is the best on the market
By EDYTA ZIELONKA (via Reviews.io)
This product works very well and the super quick delivery is a big plus
By Ian J (via Reviews.io)
Very good product once it had arrived
By Debi (via TrustPilot)
Superintendent Pharmacist
Written by Chemist Click
First created 28th April 2025
Last reviewed 4th February 2026
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Aciclovir is an antiviral medicine that can treat common viral infections.
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