

271 Yothapol Khemarak Phoumin Blvd (271), Phnom Penh, Cambodia
VIREST 400 Aciclovir B.P. 400 mg
Prescription notice
Item may require a valid prescription. Please consult your doctor or pharmacist before using new medication.
Last updated 28/08/2026 at 5:12 PM

271 Yothapol Khemarak Phoumin Blvd (271), Phnom Penh, Cambodia
Indication
VIREST 400 contains aciclovir (acyclovir), an antiviral agent used for treatment and suppression of herpes simplex virus (HSV) infections (genital herpes, cold sores, herpes labialis, herpetic whitlow), herpes zoster (shingles), and varicella (chickenpox) in immunocompromised patients.
Ingredients
- Aciclovir 400 mg
Direction
Adults: For treatment of genital herpes: 200–400 mg 5 times daily for 5 days. For suppression: 400 mg twice daily. For herpes zoster: 800 mg 5 times daily for 7 days. Start treatment as early as possible after symptom onset.
Side effects
- Nausea and headache.
- Gastrointestinal discomfort.
- Dizziness.
- Fatigue.
- Elevated creatinine (with high doses or in renal impairment).
- Neurological effects (confusion
- hallucinations) — rare
- usually with renal impairment.
Precautions
- Maintain adequate hydration during treatment (adequate fluid intake).
- Use with caution in patients with renal impairment (dose reduction required).
- Not a cure — does not eliminate the herpes virus or prevent transmission to others.
- Use with caution during pregnancy
- benefit
- risk to be assessed by physician.
- Neurological side effects may occur in elderly or those with renal impairment.
Indication
VIREST 400 contains aciclovir (acyclovir), an antiviral agent used for treatment and suppression of herpes simplex virus (HSV) infections (genital herpes, cold sores, herpes labialis, herpetic whitlow), herpes zoster (shingles), and varicella (chickenpox) in immunocompromised patients.
Ingredients
- Aciclovir 400 mg
Direction
Adults: For treatment of genital herpes: 200–400 mg 5 times daily for 5 days. For suppression: 400 mg twice daily. For herpes zoster: 800 mg 5 times daily for 7 days. Start treatment as early as possible after symptom onset.
Side effects
- Nausea and headache.
- Gastrointestinal discomfort.
- Dizziness.
- Fatigue.
- Elevated creatinine (with high doses or in renal impairment).
- Neurological effects (confusion
- hallucinations) — rare
- usually with renal impairment.
Precautions
- Maintain adequate hydration during treatment (adequate fluid intake).
- Use with caution in patients with renal impairment (dose reduction required).
- Not a cure — does not eliminate the herpes virus or prevent transmission to others.
- Use with caution during pregnancy
- benefit
- risk to be assessed by physician.
- Neurological side effects may occur in elderly or those with renal impairment.
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