Acyclovir
$0.42
Aciclovir (Acyclovir) is an antiviral medicine that treats cold sores, genital herpes, shingles and chickenpox. It helps sores heal faster and eases pain.
Drug Information
13 reviews for Acyclovir
Acyclovir (also spelled aciclovir) is an antiviral medicine. It treats infections caused by the herpes family of viruses, including cold sores, genital herpes, shingles and chickenpox.
It does not get rid of the virus completely, but it helps sores heal faster, eases pain and lowers the chance of passing the virus on. Taken every day, it can also help stop outbreaks coming back.
What is it used for?
- Genital herpes, first outbreak and repeat outbreaks
- Preventing frequent genital herpes outbreaks
- Shingles (herpes zoster)
- Chickenpox, in some people
- Severe cold sores
How does it work?
Herpes viruses need to copy themselves to spread. Acyclovir is taken up by infected cells and blocks the virus from copying its DNA. This stops the virus spreading while your immune system clears the outbreak.
This information is written in simple words to help you understand this product. It does not replace advice from your doctor or pharmacist.
Read these points before you start. If any of them apply to you, talk to your doctor or pharmacist first.
- Tell your doctor if you have kidney problems. Your dose may need to be lower, and you should drink plenty of water.
- Tell your doctor if you are pregnant, trying for a baby or breastfeeding.
- These medicines do not cure herpes. The virus stays quietly in the body and can come back, but treatment makes outbreaks shorter and milder.
- Herpes can spread through skin-to-skin contact even when you have no sores. Avoid sex during an outbreak and use condoms at other times.
- Tell your doctor or pharmacist about every other medicine, vitamin or herbal product you use.
- Keep this product out of the reach and sight of children.
Like all medicines, Acyclovir can cause side effects, but not everybody gets them.
Common side effects
- Headache
- Feeling sick (nausea) or diarrhoea
- Feeling dizzy or tired
These are usually mild and often get better as your body gets used to it. Tell your doctor if they bother you or do not go away.
Stop using it and get medical help straight away if you notice:
- Passing much less urine than usual, or pain in your lower back or side (possible kidney problems)
- Confusion, seeing or hearing things that are not there, or shaking (more likely in older people or those with kidney problems)
- Signs of an allergic reaction, such as a rash, swelling of the face or lips, or trouble breathing
This is not a complete list. If you notice anything unusual, ask your doctor or pharmacist.
- Take it exactly as your doctor tells you. It is often taken 3 to 5 times a day.
- Swallow the tablets with a glass of water. You can take them with or without food.
- Start as soon as you notice the first signs, such as tingling, itching or small blisters. It works best when started early.
- Drink plenty of water while you take it.
- Common adult doses: genital herpes 400 mg three times a day for 5 to 10 days; shingles 800 mg five times a day for 7 days. Your doctor will choose the right dose for you.
If you miss a dose: Take it as soon as you remember. If it is nearly time for your next dose, skip the missed one. Never take two doses at once.
If you use too much: Contact your doctor, a poison control centre or your local emergency number straight away, even if you feel fine. Take the pack with you.
How to store it: Keep it in its original pack at room temperature (below 25°C / 77°F), away from heat, damp and direct sunlight. Do not use it after the expiry date.
- QWhen should I start taking Acyclovir?
- A
As early as possible, ideally within 1 to 2 days of the first tingle or blister (within 3 days for shingles). The earlier you start, the better it works.
- QWill Acyclovir cure my herpes?
- A
No. It controls outbreaks and helps them heal faster, but the virus stays in the body and can come back.
- QCan I take Acyclovir every day to prevent outbreaks?
- A
Yes. If you get outbreaks often, your doctor may suggest a lower daily dose, such as 400 mg twice a day.
- QWhy do I need to drink more water with Acyclovir?
- A
Plenty of water helps your kidneys get rid of the medicine and prevents kidney problems.

Amara Flores –
I went looking for Acyclovir and ended up ordering it here. I had no trouble at checkout, which is not always the case on other sites. Honestly, the item looked exactly like the listing. Thanks for the easy experience!
Daria Thompson –
Decided to order Acyclovir here and it went smoothly. I was happy with how carefully it was packed. Also, customer service was polite and helpful. Happy with the experience overall.
Samuel Mitchell –
The quality looked good to me. Delivery was quicker than I thought it would be. Easy to deal with, which is what I wanted.
Mariam Jimenez –
Just got my order and everything went well. Everything was packed carefully and nothing was damaged. The right item came, and the label matched my order. Very satisfied with how it all went.
Nikhil Scott –
Tried this site for the first time and had a good experience. Checkout was simple and I never felt lost on the site. My Acyclovir reached me without any delays.
Kofi Yamamoto –
Here is my honest feedback on my order. The quantity was right and everything was accounted for. Overall very good, thanks.
Farah Coleman –
No complaints about the product. Everything went well, so I will be back. Finding the right item took very little time.
Sana Vega –
I was a little nervous about ordering Acyclovir online, but it turned out fine. Everything on the product page was clear, so I knew what I was getting. Reasonably priced and the discount at checkout was a nice touch. A good experience from start to finish.
Henry Castillo –
Quick review of my recent order. The expiry date was fine and everything looked as it should. The delivery took about as long as I was told.
Diego Richard –
First time ordering here and it was a pleasant surprise. I got a helpful reply when I asked about my order. The outer box was discreet and the inside was well arranged. Good service, will reorder when I need to.
Samir Esposito –
I used this site for my latest order and had no problems. Their staff was patient with my questions. The Acyclovir I ordered was packed neatly and nothing was damaged.
Lucas Harris –
I was a bit unsure at first, but ordering here worked out fine. Everything was in order when I opened the box. The confirmation emails were clear and arrived quickly. I would recommend this site to friends and family.
Marco Nowak –
I ordered from here after comparing a few options. The parcel arrived a day or two sooner than I figured. I checked everything against my order and it was all correct.