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Virux 200 mg

Tablet

Generic: Acyclovir

Square Pharmaceuticals PLC.

Therapeutic Class: Antiviral (Nucleoside Analogue)

Indications

Herpes simplex infections of the skin and mucous membranes, including genital herpes and cold sores; prevention of recurrent herpes. Chickenpox (varicella) and shingles (herpes zoster).

Pharmacology

Acyclovir is converted by viral thymidine kinase and cellular enzymes to acyclovir triphosphate, which inhibits viral DNA polymerase and stops viral DNA synthesis. It acts selectively in herpes virus-infected cells.

Dosage & Administration

Herpes simplex: 200 mg 5 times daily for 5 days (400 mg in immunocompromised patients). Prevention of recurrent herpes: 400 mg twice daily. Shingles and chickenpox (adult): 800 mg 5 times daily for 7 days. Child: herpes simplex - under 2 years half the adult dose; chickenpox - 20 mg/kg (maximum 800 mg) 4 times daily for 5 days. Cream 5%: apply 5 times daily for 5-10 days, starting at the first sign.

Side Effects

Nausea, vomiting, diarrhoea, abdominal pain, headache, dizziness, skin rash. Rarely: renal impairment, confusion and tremor (mainly in renal impairment or the elderly). Cream: transient stinging or burning.

Precautions & Warnings

Maintain adequate fluid intake. Reduce the dose in renal impairment and use with caution in the elderly. Start treatment as early as possible after symptoms appear. Use as directed by a registered physician and complete the advised course.

Contraindications

Hypersensitivity to acyclovir or valacyclovir.

Storage Conditions

Store below 30°C in a cool, dry place, away from light. Keep out of the reach of children.

This information is for reference only. Always consult a qualified doctor or pharmacist before taking any medicine.