Prescription requiredAntiviral

Zovir 800MG Tab — Side Effects & Warnings

Known side effects of Zovir 800MG Tab include Nausea, vomiting, diarrhoea, abdominal pain, headache, dizziness, fatigue, rash. Not everyone experiences these side effects.

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

Common Side Effects

Nausea
vomiting
diarrhoea
abdominal pain
headache
dizziness
fatigue
rash

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Use with caution in kidney disease and in elderly patients; dose adjustment may be needed. Maintain adequate hydration to reduce risk of kidney-related side effects. Stop and seek medical help if signs of allergy (swelling, breathing difficulty, severe rash) occur. Not a cure for herpes; can still transmit infection—use safe sexual practices. Caution in immunocompromised patients; use only under medical supervision.

Drug Interactions

Zovir 800MG Tab may interact with the following:

Probenecid (may increase acyclovir levels)
other nephrotoxic drugs such as aminoglycosides
amphotericin B
cyclosporine
tacrolimus
NSAIDs (increased kidney risk)
mycophenolate mofetil (may increase exposure)

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Consult doctor

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store below 25°C in a dry place, protected from moisture and light. Keep out of reach of children.

Zovir 800MG Tab — Safety Summary

Composition: Acyclovir 800 mg
Prescription: Required (Rx)
Pregnancy: Consult doctor
Alcohol: Use with caution
Habit forming: No

Zovir 800MG Tab — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.