Valtrex

Prescription-only medicine · General · UK online pharmacy

Valtrex is a prescription antiviral medication used to treat infections caused by herpes simplex viruses, such as genital herpes (HSV-2) and cold sores (HSV-1). It is also effective against varicella zoster virus (VZV), responsible for shingles and chickenpox. Additionally, Valtrex is prescribed for preventing cytomegalovirus (CMV) in immunocompromised patients, particularly organ transplant recip

Key facts

• Classification: Prescription-only medicine (POM) in the UK
• Treatment category: General
• Price (if prescribed): from £32.99
• Typical supply: 5 days
• Availability: Available following an online consultation
• Prescriber review: every order is assessed by a GPhC-registered pharmacist

Valtrex prices by dose and pack size

Prices correct as of 2026-08-21. The exact dose is confirmed during the clinical assessment.

Valtrex: Effective Antiviral Medication for Herpes and Shingles

What is Valtrex?

Valtrex is a prescription antiviral medication used to treat infections caused by herpes simplex viruses, such as genital herpes (HSV-2) and cold sores (HSV-1). It is also effective against varicella zoster virus (VZV), responsible for shingles and chickenpox. Additionally, Valtrex is prescribed for preventing cytomegalovirus (CMV) in immunocompromised patients, particularly organ transplant recipients.

This oral medication, available in 500mg tablets, is known for relieving symptoms quickly, often within 24 hours, and significantly reducing the duration of outbreaks when taken at the first sign of infection.

How Does Valtrex Work?

Valtrex contains valaciclovir hydrochloride, which transforms into aciclovir in the body, enabling more active ingredient absorption and efficient treatment.

• Target Viral Replication: Valtrex prevents the herpes virus from reproducing by halting its ability to grow and duplicate DNA.
• Supports Natural Defence: By reducing viral spread, it allows the body’s immune system to suppress the virus and push it back to its dormant state.

How to Take Valtrex?

The dosage of Valtrex depends on the condition being treated. Always follow your healthcare professionals prescription.

Recommended Dosages

• Genital herpes (initial outbreak): 500mg twice daily for 5 days.
• Cold sores (initial outbreak): Four 500mg tablets followed by another four after 12 hours. Treatment lasts one day.
• Shingles: Two 500mg tablets three times daily for 7 days.
• Recurrent genital herpes and cold sores: 500mg twice daily for 3-5 days.
• Preventing outbreaks: 500mg once daily for 6-12 months.

Important Usage Tips

• Swallow tablets whole with water.
• Drink plenty of fluids to prevent dehydration.
• Do not crush or split tablets.
• Complete the full course even if symptoms improve.
• If you miss a dose, take it as soon as you remember, unless it’s close to the next dose.

What Are the Possible Side Effects of Valtrex?

Valtrex is generally well-tolerated, but some users may experience mild side effects, such as:

• Headache
• Nausea or vomiting
• Dizziness
• Diarrhoea
• Skin rash or itching

Serious Side Effects (Rare):

• Allergic reactions, such as swelling of the lips, face, or throat, difficulty breathing, and skin flushing.
• Seek immediate medical attention for severe reactions.

Precautions for Using Valtrex

Valtrex is unsuitable for some individuals. Consult your healthcare professional if you:

• Are allergic to valaciclovir or aciclovir.
• Have kidney or liver problems.
• Are over 65 years old or immunocompromised.
• Are pregnant or breastfeeding.

Note: While Valtrex effectively suppresses herpes outbreaks, it does not cure the virus or prevent transmission. Avoid sexual activity during outbreaks and use protective measures to prevent spreading the virus.

Does Valtrex Interact with Other Medicines?

Certain medications may interact with Valtrex, affecting its efficacy or increasing side effects. Inform your healthcare professional if you’re taking:

• Antibiotics: Aminoglycosides.
• Immunosuppressants: Ciclosporin or tacrolimus.
• Antivirals: Foscarnet.
• Stomach ulcer medications: Cimetidine.
• Other medications: Platinum-based chemotherapy drugs, methotrexate, or pentamidine.

How to Buy Valtrex Online Safely?

You can purchase Valtrex online at Medihealth Direct following a quick and confidential online consultation. A registered healthcare professional will review your medical information to ensure this treatment is safe and effective for you. Once approved, your order will be delivered discreetly, with next-day delivery available.

Valtrex FAQs

Can Valtrex prevent shingles?

No, Valtrex is not typically prescribed to prevent shingles. Vaccination or other preventive measures may be more effective.

Can I buy Valtrex over the counter?

No, Valtrex is a prescription-only medication.

How much Valtrex do I take for cold sores?

The usual dose is 2000mg twice daily (four 500mg tablets twice daily). Allow 12 hours between doses, and take the medication for one day only.

Can Valtrex make your period irregular?

No, Valtrex is not known to affect menstrual cycles.

Can Valtrex cause hair loss?

No, Valtrex is not associated with hair loss.

Can I drink alcohol while taking Valtrex?

Moderate alcohol consumption is safe while taking Valtrex, but excessive drinking may exacerbate side effects.

Is it safe to buy Valtrex online?

Yes, buying Valtrex online from Medihealth Direct is safe. We follow strict UK regulations and ensure your order is genuine and confidential.

How does the online consultation for Valtrex work?

1. Complete a confidential online health questionnaire.
2. A GPhC-registered pharmacist reviews your answers and confirms whether the treatment is clinically appropriate.
3. If approved, your medication is dispensed by the pharmacy and delivered in discreet packaging by tracked UK delivery.

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