How does aciclovir work?
Aciclovir interferes with the herpes virus’s ability to replicate, helping to reduce symptoms and shorten the duration of outbreaks. It does not cure herpes but can help control flare-ups.
What is aciclovir used to treat?
Aciclovir is commonly prescribed for:
- Cold sores (oral herpes)
- Genital herpes (to reduce symptoms and prevent outbreaks)
- Chickenpox (to shorten the duration of illness, particularly in high-risk individuals)
- Shingles (herpes zoster)
- Preventing herpes infections in people with weakened immune systems
Who can take aciclovir?
Aciclovir is suitable for most adults and children, but doses may vary depending on the condition being treated.
Who might not be able to take aciclovir?
Aciclovir may not be suitable if you:
- Have kidney problems (your doctor may adjust your dose)
- Are dehydrated or at risk of dehydration
- Have had an allergic reaction to aciclovir or similar antiviral medications
Can I take aciclovir if I’m pregnant or breastfeeding?
Aciclovir is usually considered safe during pregnancy and breastfeeding, but speak to your doctor before using it.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is aciclovir?
Aciclovir is highly effective at reducing herpes symptoms and preventing outbreaks when taken correctly.
What should I do if I take too much?
Taking too much aciclovir can cause nausea, confusion, dizziness, and kidney problems. If you think you’ve taken too much, seek medical advice immediately.
What dose of aciclovir is usually taken?
- For cold sores and genital herpes: 200mg five times daily for 5 days
- For shingles and chickenpox: 800mg five times daily for 7 days
- For long-term herpes suppression: 400mg twice daily
Your doctor will determine the correct dose for your condition.
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What are the side effects of aciclovir?
Common side effects include:
- Nausea or vomiting
- Headache
- Dizziness
- Diarrhoea
- Skin rash or itching
Serious side effects, such as severe allergic reactions or kidney problems, require urgent medical attention.
How should I take aciclovir?
Aciclovir is taken as tablets, liquid, or cream, depending on the infection being treated. Tablets and liquid should be taken with plenty of water.
When should aciclovir be taken?
Aciclovir is usually taken at evenly spaced times throughout the day to keep a constant level in the body.
What are the brand names for aciclovir?
Aciclovir is available as a generic medicine, but some branded versions include:
- Zovirax
Final thoughts
Aciclovir is an effective antiviral medication for managing herpes infections. It does not cure herpes but can help control symptoms and prevent outbreaks. If you experience side effects or worsening symptoms, speak to your doctor or pharmacist.
