Prescription requiredAntiviral

Zovirax 400 — Uses, Dosage & Benefits

Zovirax 400 is used for Treatment of herpes simplex infections (genital herpes, cold sores), mucocutaneous herpes in immunocompromised patients, and treatment/suppression of recurrent herpes infections; also used for chickenpox (varicella) and shingles (herpes zoster) as prescribed..

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated August 2026

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Active Ingredient / Composition

Acyclovir 400 mg (as tablets)

What is Zovirax 400 used for?

Treatment of herpes simplex infections (genital herpes
cold sores)
mucocutaneous herpes in immunocompromised patients
and treatment/suppression of recurrent herpes infections; also used for chickenpox (varicella) and shingles (herpes zoster) as prescribed.

How Zovirax 400 Works

Acyclovir is an antiviral medicine that is activated preferentially in virus-infected cells and inhibits viral DNA polymerase. This blocks viral DNA replication, reducing viral multiplication and helping lesions heal faster.

Dosage & Directions

Tablet: take exactly as prescribed, usually 2–5 times daily depending on indication. Can be taken with or without food; take with a full glass of water and maintain good hydration. Start treatment as early as possible after symptom onset for best benefit.

Always follow your doctor's prescription. Do not self-medicate.

Key Benefits

Reduces severity and duration of herpes outbreaks
Helps faster healing of blisters/lesions
Lowers frequency of recurrent episodes with suppressive therapy
Reduces viral shedding when used as prescribed

Pregnancy

Consult doctor (generally considered usable when benefits outweigh risks)

Alcohol Interaction

Use with caution (no known direct interaction; alcohol may worsen dehydration and symptoms)

Zovirax 400 — Quick Facts

Composition: Acyclovir 400 mg (as tablets)
Therapeutic class: Antiviral
Drug class: Antiviral (nucleoside analogue; guanine analogue)
Prescription: Required (Rx)
Price: ₹146
Habit forming: No
Storage: Store below 25°C in a cool, dry place. Protect from moisture and direct light. Keep out of reach of children.

Zovirax 400 — Usage FAQs

How should I take this medicine?

Follow the dosage prescribed by your doctor. Do not alter the dose without medical advice.

Can I take this medicine without a prescription?

Prescription-required medicines need a valid Rx. OTC medicines can be purchased directly.

What if I miss a dose?

Take the missed dose as soon as you remember, unless it is close to your next scheduled dose. Do not double the dose.

How long does it take to show effect?

The time to show effect varies by medicine and condition. Consult your doctor for specific timelines.

Zovirax 400 — Uses, Dosage & Benefits

Active Ingredient / Composition

What is Zovirax 400 used for?

How Zovirax 400 Works

Dosage & Directions

Key Benefits

Pregnancy

Alcohol Interaction

Zovirax 400 — Quick Facts

Zovirax 400 — Usage FAQs

More from PingMeDoc™

Safety disclaimer

Zovirax 400 — Uses, Dosage & Benefits

Active Ingredient / Composition

What is Zovirax 400 used for?

How Zovirax 400 Works

Dosage & Directions

Key Benefits

Pregnancy

Alcohol Interaction

Zovirax 400 — Quick Facts

Zovirax 400 — Usage FAQs

More from PingMeDoc™

Safety disclaimer