Zovirax 400 mg: Complete Guide to Uses, Dosage, and Safety
Zovirax 400 mg is a widely used antiviral medication designed to treat infections caused by herpes viruses. Its active ingredient, acyclovir, is part of the nucleoside analogue class, which works by stopping the replication of viral DNA, thereby limiting the spread of herpes simplex and varicella-zoster viruses.
What Zovirax 400 mg Is Used For
Zovirax 400 mg is commonly prescribed for:
Treating genital herpes during first outbreaks or recurrent episodes
Managing cold sores (herpes labialis)
Supporting treatment for herpes zoster (shingles) in milder cases
Helping to prevent recurrent herpes episodes when used as suppression therapy
By inhibiting viral replication, Zovirax reduces the duration and severity of outbreaks, alleviates pain and discomfort, and promotes faster healing.
Active Ingredient
Acyclovir 400 mg – an effective antiviral that blocks the replication of herpes viruses at the DNA level.
How to Take Zovirax 400 mg
Take the tablets orally with a full glass of water, with or without food.
Dosage and duration depend on the type of infection and whether it is a first episode, recurrence, or suppression therapy.
Stay well hydrated to protect kidney function while using this medication.
Always follow your healthcare provider’s instructions; do not skip doses or adjust the regimen on your own.
Safety Information & Side Effects
Inform your healthcare provider if you have kidney disease, immune system disorders, or are pregnant/breastfeeding.
Common side effects: headache, nausea, mild stomach upset, or fatigue.
Rare but serious reactions (neurological issues or kidney problems) require urgent medical attention.
Key Benefits of Zovirax 400 mg
Effective for a variety of herpes infections
Supports faster recovery and symptom relief during outbreaks
Suitable for both treatment and suppression therapy under medical guidance
Proven safety and efficacy backed by clinical studies
Disclaimer: This content is for educational and SEO purposes only. It does not replace professional medical advice. Always consult a licensed healthcare provider before starting, changing, or stopping any medication.






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