About valaciclov ir
Antiviral nucleoside analogue
Used for
- Cold sores and genital herpes
- Shingles
- Preventing recurrent herpes infections
- Preventing cytomegalovirus after organ transplant
Usual adult dose
Herpes simplex: usually 500 mg twice daily for 3–10 days. Shingles: 1,000 mg three times daily for 7 days. Doses vary by condition and kidney function.
Common side effects
- Headache
- Nausea or stomach discomfort
- Dizziness
- Rarely, confusion or kidney problems
Important warnings
- Dose reduction may be needed with kidney impairment or in older adults.
- Drink enough fluids; dehydration can increase kidney risks.
- Seek urgent care for severe rash, confusion, or reduced urination.
- Not suitable for everyone; follow the prescribed course.
Pregnancy
Use when clinically needed; available evidence has not shown increased birth-defect risk. A clinician should weigh benefits and risks.
Breastfeeding
Small amounts pass into milk; generally considered compatible, but discuss use with a clinician, especially for a newborn.
Interactions
- Medicines affecting the kidneys, such as some anti-inflammatory drugs, may increase kidney problems.
- Probenecid and cimetidine can raise valaciclovir levels.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.