Aciclovir Tablets

Shingles, caused by a type of herpes virus (Herpes Zoster) is a viral infection that causes a painful rash with shooting pain on one side of the body only. Usually, the rash appears as blotches on your chest and stomach but can appear in any area of the body including your face, eyes and genitals.

Genital herpes is caused by the same virus as cold sores (Herpes simplex virus or HSV) though a different strand (HSV-2). Speak to your doctor or visit your sexual health clinic as soon as possible if you notice painful blisters which burst to leave red open sores around your genitals (they can also exist on your anus, thighs or bottom). Urinating can also be painful.

Chickenpox is a virus caused by the varicella-zoster virus. It is common among children, but anyone can catch it at any age, but you can only catch it once. When adults get it, the symptoms are usually worse. Chickenpox spots begin as red spots all over the body. These red spots fill with fluid and are called blisters or vesicles. The blisters can burst and then eventually start to scab over. Chickenpox is often a very itchy disease that makes people quite uncomfortable. People may also feel quite poorly with fevers, poor appetite and generalised aches and pains. Chickenpox usually lasts a few weeks. People are infectious from a couple of days before the spots appear until after the spots have all crusted over (usually about five days later).

Aciclovir is not commonly used for cold sores, but there are some circumstances where your doctor will consider prescribing it. If they have, you should take your prescribed dose as soon as you recognise the tingling or burning sensation at the site of the outbreak. Cold sores are an infection caused by the herpes simplex virus – once you’ve had contact with the virus, it lies dormant in the nerves supplying the skin and may flare up from time to time. You might recognise triggers – stress and exposure to the cold or sun are common ones. Unfortunately, aciclovir only treats the symptoms of a cold sore, nothing can cure you of the virus or prevent any future cold sores.

Aciclovir is an antiviral agent that interferes with the growth and replication of viral particles, helping your immune system to target and tackle the virus. 

Aciclovir is best to be used in the initial stages of an outbreak, usually within the first 5 days. For treatment of outbreaks, you will be taking a high dose for a short course, usually for 3-5 days. If you have a weakened immune system, treatment doses are usually double the standard doses for healthy individuals. Suppressive antiviral treatment is an option for frequent (usually around 6 or more per year) outbreaks that are causing distress or if outbreaks are affecting your social life.

Aciclovir tablets can effectively treat viral infections, but they aren’t suitable for everyone. If you’re allergic to aciclovir or any other tablet ingredients, you should avoid them. People with kidney problems need to be especially careful, as the kidneys process aciclovir. If you have a history of kidney disease, your doctor may need to adjust the dose or monitor you more closely during treatment.

Pregnant or breastfeeding women should consult a doctor before using aciclovir tablets, as the medication can pass into breast milk or may affect the developing baby. The same applies if you're planning to become pregnant—discussing potential risks with your healthcare provider is essential.

People with a weakened immune system, such as those undergoing treatments for cancer or those with conditions like HIV, should also approach aciclovir with caution. In these cases, a doctor might prescribe a lower dose or choose a different treatment to avoid complications.

If you have any of these conditions, speaking to your healthcare provider before starting aciclovir is important. They’ll guide you on whether it’s the right choice or if an alternative treatment may be safer.

Aciclovir is generally well-tolerated in most individuals. A small number of patients may experience symptoms of fatigue, headache, feeling dizzy, nausea, vomiting, abdominal pain, itching and a rash (including sensitivity to light). If these happen to you, stop taking the medication and seek advice from your doctor.

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