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Indications - Aciclovir is indicated for- The treatment of viral infections due to Herpes simplex virus (type I & II) and Varicella zoster virus (herpes zoster & chicken pox). The treatment of Herpes simplex virus infections of the skin and mucous membranes including initial and recurrent genital herpes and herpes labialis. The prophylaxis of Herpes simplex infections in immunocompromised patients

Dosage & Administration - Treatment of initial herpes simplex: 200 mg 5 times daily usually for 5 days. For immunocompromised patients: Adult: 400 mg 5 times daily for 5 days (longer if new lesions appear during treatment or if healing is incomplete; increase dose to 800 mg 5 times daily for genital herpes in immunocompromised) or as directed by the registered physician. Children under 2 years: Half of the adult dose. Children over 2 years: Adult dose. Prevention of recurrence of herpes simplex: Adult: 200 mg 4 times daily or 400 mg twice daily possibly reduced to 200 mg 2 or 3 times daily and interrupted every 6-12 months. Children under 2 years: Half of the adult dose. Children over 2 years: Adult dose. Prophylactic treatment of herpes simplex in the immunocompromised patients: Adult: 200 to 400 mg 4 times daily. Children under 2 years: Half of the adult dose. Children over 2 years: Adult dose. Treatment of vericella (chicken pox): Adult and children over 40 kg: 800 mg 4 times daily for 5 days. Children below 40 kg: 20 mg/kg (maximum 800 mg) per dose orally 4 times daily (80 mg/kg/day) for 5 days. Children 1 month-2 years: 200 mg 4 times daily for 5 days. Children 2-5 years:400 mg 4 times daily for 5 days. Children 6-12 years:800 mg 4 times daily for 5 days. Treatment of herpes zoster (Shingles): 800 mg 5 times daily for 7 days. Treatment of initial rectal (Proctitis) herpes infections: An oral Aciclovir dosage of 400 mg 5 times daily for 10 days or until clinical resolution occurs has been recommended. Renal Impairment: For patients with severe renal impairment, a reduction of the doses is recommended.

Side Effects - Rash, gastrointestinal disturbance, rise in bilirubin and liver-related enzymes, increase in blood urea and creatinine, decrease in hematological indices, headache, neurological reaction, fatigue.

Contraindications - Aciclovir is contraindicated in patients known to be hypersensitive to Aciclovir.

Others - Pregnancy & Lactation Pregnancy category B. Aciclovir should not be used during pregnancy unless the potential benefit justifies the potential risk to the fetus. Caution should be exercised when it is administered to a nursing mother. Precautions & Warnings Aciclovir should be administered with caution in patients with renal impairment and doses should be adjusted according to creatinine clearance. Monitor neutrophil count at least twice weekly in neonates. Storage Conditions Should be stored below 25°C. It should be protected from light and moisture.Keep out of the reach of children.