Not medical advice. This information is for educational purposes only. Always consult a qualified doctor or pharmacist before taking any medicine. Valacyclovir requires a valid prescription.
Valacyclovir
Generic Name: VALACYCLOVIR HYDROCHLORIDE
Valacyclovir hydrochloride is the hydrochloride salt of the L -valyl ester of the antiviral drug acyclovir.
Data last updated: 30 March 2026 · Source: openFDA.gov, DailyMed (NLM/NIH)
Common Brand Names in India:
What is Valacyclovir Used For?
- Cold sores (herpes labialis)
- The initial episode of genital herpes in immunocompetent adults
- Recurrent episodes of genital herpes in immunocompetent adults
- Transmission of genital herpes in immunocompetent adults
- Herpes zoster (shingles) in immunocompetent adults
- Chickenpox in immunocompetent pediatric patients aged 2 to less than 18 years
- Disseminated herpes zoster have not been established
How Does It Work?
The binding of acyclovir to human plasma proteins ranges from 9% to 33%.
Side Effects
Common Side Effects
Serious Side Effects (seek immediate medical attention)
Warnings & Precautions
- Thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS): Has occurred in patients with advanced HIV-1 disease and in allogenic bone marrow transplant and renal transplant patients receiving 8 grams per day of valacyclovir hydrochloride in clinical trials.
- Caution should be exercised when administering valacyclovir hydrochloride to patients receiving potentially nephrotoxic drugs.
Who Should NOT Take This?
- Valacyclovir tablets are contraindicated in patients who have had a demonstrated clinically significant hypersensitivity reaction (e.g., anaphylaxis) to valacyclovir, acyclovir, or any component of the formulation [see Adverse Reactions ] . Hypersensitivity to valacyclovir (e.g., anaphylaxis), acyclovir, or any component of the formulation. (4)
Drug Interactions
Valacyclovir may interact with the following medicines. Always inform your doctor about all medications you are taking.
Storage Instructions
Store at room temperature, away from moisture and heat.
Speak to a general physician on Zospital
Consult a general physician on Zospital before starting Valacyclovir. Verified Indian specialists available for in-clinic and online consultations.
Other Antivirals Medicines
Sources: openFDA.gov · dailymed.nlm.nih.gov · nlm.nih.gov (RxNorm). Information is for educational purposes only. Consult a doctor before use.
FAQS
Valacyclovir – Frequently Asked Questions
Common questions about Valacyclovir, its uses, dosage and safety.
Valacyclovir is commonly prescribed in India for: Cold sores (herpes labialis), The initial episode of genital herpes in immunocompetent adults, Recurrent episodes of genital herpes in immunocompetent adults, Transmission of genital herpes in immunocompetent adults, Herpes zoster (shingles) in immunocompetent adults, Chickenpox in immunocompetent pediatric patients aged 2 to less than 18 years. Always confirm the indication with a registered medical practitioner before starting any course.
Valacyclovir is sold in India under brand names such as Valtrex, Valcivir, Valavirex. You can also find it on online pharmacies like 1mg, Pharmeasy and Apollo Pharmacy.
Valacyclovir is a prescription-only (Schedule H) medicine in India. You will need a valid prescription from a registered MBBS / MD doctor to purchase it from a licensed pharmacy.
Common side effects of Valacyclovir can include: Nausea, Vomiting, Diarrhea, Headache, Dizziness, Fatigue, Rash, Abdominal pain. Less common but serious side effects can include: Serious, Anaphylaxis, Aplastic, Seizure, Renal failure. Stop the medicine and contact your doctor immediately if any of these appear.
The binding of acyclovir to human plasma proteins ranges from 9% to 33%.
Valacyclovir can interact with: Clinical. Tell your doctor about every medicine, supplement and herbal product you take — including ayurvedic and homeopathy preparations — before starting Valacyclovir.
Indian guidelines often recommend lower starting doses of Valacyclovir for patients above 60-65, since kidney and liver function decline with age. A doctor should review the dose, especially if the patient already takes BP, sugar or heart medicines.
Pregnancy safety of Valacyclovir depends on the trimester and individual case. Indian gynaecologists usually avoid Category C/D drugs unless benefit clearly outweighs risk. Speak to your obstetrician before taking Valacyclovir during pregnancy or while planning conception.
Prices in India typically range from ₹30 – ₹500 per strip / vial depending on brand. Generic versions tend to cost 30-60% less than branded ones, and Jan Aushadhi outlets often stock the lowest-priced equivalents. Check 1mg or Pharmeasy for live MRP.
If you remember within a few hours of the missed dose, take it. If it is nearly time for the next dose, skip the missed one — never double up. Frequent missed doses reduce Valacyclovir's effectiveness, so consider setting a reminder or speaking to your doctor about a simpler schedule.
You can book an in-person or online consultation with a verified Indian specialist on Zospital — visit the doctor directory at https://zospital.com/doctor to find one near you.
Medical Disclaimer
The content provided on Zospital is for general informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. If you think you may have a medical emergency, call your doctor or emergency services immediately.