Valtrex 500mg Tablet

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Brand GSK
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Dr. Mohd Izzat Amir Bin Awang
Reviewed byDr. Mohd Izzat Amir Bin AwangDoctor of Medicine (MD), University of Mansoura - Manchester
Dr. Chong Zhan Pong
Written byDr. Chong Zhan PongDoctor of Medicine (MD), International Medical University (IMU)

Last reviewed on

Overview

Valtrex 500mg Tablet is a prescription-only medicine (POM) that contains Valacyclovir 500mg (as valacyclovir hydrochloride). It is supplied as a tablet and is dispensed in Malaysia only against a valid prescription issued by a registered doctor.

Under Malaysian rules for prescription medicines, this page carries product, safety and handling information only. Your doctor or pharmacist will explain whether this medicine is suitable for you, the dose you should take, and how long you should take it.

On DoctorOnCall, Valtrex 500mg Tablet is reviewed by a licensed doctor through an online consultation and dispensed by a registered pharmacist before delivery. Always follow the instructions on your prescription label and the package insert supplied with the product, and do not share this medicine with anyone else.

Directions for Use

Take Valtrex 500mg Tablet with or without food, swallowing the tablet whole with water. Start treatment as soon as possible after symptoms begin (such as the first tingling before a cold sore or shingles rash appears), as valacyclovir works best when started early in an outbreak.

Dosage

The dose and duration of Valtrex 500mg Tablet depend on the condition being treated – for example, a short course for cold sores or genital herpes outbreaks, a longer course for shingles, or ongoing lower-dose therapy to suppress recurrent genital herpes – and your doctor will prescribe the regimen that is right for your situation. Drink plenty of fluids while taking this medicine, especially at higher doses.

Storage Instructions

Store below 30°C in a dry place, away from direct sunlight and out of reach of children.

Side Effects

  • Headache
  • Nausea
  • Stomach pain
  • Dizziness
  • Tiredness
  • Skin rash (rare)
  • Confusion (especially in older adults)

Contraindications

  • Known hypersensitivity to valacyclovir, aciclovir, or any ingredient in this product
  • Severe kidney impairment without an appropriate dose adjustment made by your doctor

Drug / Food Interactions

  • Probenecid and cimetidine can increase aciclovir blood levels by reducing its clearance from the body
  • Other medicines that affect the kidneys (such as certain NSAIDs or aminoglycoside antibiotics) may increase the risk of kidney-related side effects when combined
  • Mycophenolate mofetil (used after organ transplant) may have increased blood levels when combined with valacyclovir

Quick Tips

  • Start treatment as early as possible when you notice the first signs of an outbreak, such as tingling or itching
  • Drink plenty of fluids while taking this medicine, particularly if you are on a higher dose
  • Avoid close skin contact during an active outbreak, as herpes can still spread even with treatment
  • Complete the full course as prescribed, even if your symptoms improve quickly

Ingredients / Active Ingredients

  • Valacyclovir 500mg (as valacyclovir hydrochloride)

Safety Advice

Pregnancy

Safe If Prescribed

This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.

Breastfeeding

Use With Care

Use with caution. Monitor infant for potential adverse reactions.

Kidney

Use With Care

Use cautiously. Dose adjustment or monitoring may be required.

Liver

Use With Care

Use cautiously. Liver function monitoring may be required.

Alcohol

Generally Safe

Consuming alcohol with this medicine is generally safe, but moderate intake is advised.

Driving

Use With Care

Use caution while driving until you know how this medicine affects you.

Frequently Asked Questions

Product Specifications

BrandGSK
ClassificationPrescription medicine
Ingredients / Active IngredientsValacyclovir
Pack Size14s, 42s
Shelf LifeUse this product before the expiry date stated on the packaging. Do not use the medicine if the expiry date has passed.

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