valaciclovir 500mg, pack of 42 tablets

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valaciclovir 500mg, pack of 42 tablets
Valaciclovir is a medication prescribed to treat acute outbreaks or to prevent recurrent bouts of genital herpes.

Order valaciclovir from Superdrug Online Doctor - our service is discreet, fast and confidential. To place your order, fill in our brief medical questionnaire and select your preferred treatment. One of our online doctors will review your order and approve treatment if appropriate.

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To place an order, fill in a brief questionnaire. One of our doctors will review your order and prescribe a suitable treatment.

1st outbreak -
up to 10 days (20 tablets)
Repeat outbreaks -
3 to 5 days, 1 course (10 tablets)
3 to 5 days, 2 courses (20 tablets) £70.00
3 to 5 days, 3 courses (30 tablets)
Suppression treatments -
3 months (84 tablets)

Prices include prescription and delivery.

In a hurry? Choose Click and Collect and pick up your order after just 4 hours from a Superdrug Pharmacy.

Delivery options

Delivery method Cost Estimated delivery

You will choose your delivery option at the checkout. Delivery options may vary depending on the pack size and dosage chosen.

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About Valaciclovir
Valaciclovir or Valacyclovir is a prescription-only antiviral medicine, which is used to treat or suppress genital herpes simplex of the genitals. as well as cold sores, chickenpox and shingles. 

Valaciclovir will not cure genital herpes, but it will suppress the virus, helping to control the painful symptoms or prevent outbreaks.

There are two types of herpes simplex virus: HSV-1 and HSV-2, both of which can cause symptoms on the genitals, lips and fingers. Valaciclovir can be used to treat both HSV-1 and HSV-2.  

Once you have caught herpes simplex, the virus may remain inactive for many years, during which time you will not have any symptoms. When the virus is active, it can cause pain, itching, stinging and blisters. Valaciclovir is an antiviral medicine, which stops the virus from replicating and can be used to treat the symptoms or prevent outbreaks. 

For your treatment to work, take Valaciclovir as soon as you notice symptoms, and ideally within five days of the first herpes symptoms appearing. Always follow the doctor’s instructions on how to take your medication.

Please note: where a generic product has been ordered we may use a range of manufacturers to provide you with your medication, in order to maintain our service levels.
Which dosage do I need to take?

You should aim to begin antiviral treatment within the first five days of noticing herpes symptoms, but taking Valaciclovir within the first two days of an outbreak produces the best results. If you are being treated for your first outbreak of herpes, the doctor may prescribe a dose of one 500mg Valaciclovir tablet taken twice daily for five days, or up to ten days if new lesions appear during treatment or if healing is incomplete.

If you are having a repeat outbreak of herpes the doctor may prescribe the same dosage (500mg) per day, but for only three to five days. Always follow the doctor’s instructions on how to take your medication.

Each dose should be taken at the same time everyday and with a glass of water.  If you miss a tablet,take it as soon as you remember. If it is already time for the next dose, continue to take the next pill as usual without taking a double dose. Follow the doctor's instructions carefully. Complete the course you have been prescribed, even if your symptoms have improved. Please note, product packaging may differ from the image above.
Whilst you are taking Valaciclovir, there is a risk of kidney damage  if you become dehydrated. Valaciclovir also makes your skin sensitive to sunburn. It is important that you drink enough water and that you apply sunscreen to protect yourself from these side effects whilst you are taking the medication.

Can I have intercourse during treatment?

You should not have sex during an episode of herpes, as this puts your partner at risk of contracting genital herpes. Genital herpes can also be transmitted during oral and anal sex.
What does each Valaciclovir tablet contain?

Each tablet contains either 250mg, 500mg or 1000mg of Valaciclovir (in the form of valaciclovir hydrochloride monohydrate). Further ingredients are cellulose microcrystalline, povidone, magnesium stearate, hypromellose, hydroxypropyl cellulose, titanium dioxide (E171), macrogol 400 and hypromellose. The film coat contains hypromellose, titanium dioxide, polysorbate 80 and carnauba wax.

Valaciclovir is also sold as Valtrex, a branded medication.
Common Side Effects

  • headache
  • nausea and vomiting

Uncommon Side Effects

  • breathing problems
  • photosensitivity
  • rash
  • tremors
  • feelings of agitation

Rare Side Effects

  • dizziness
  • confusion
  • drowsiness
  • hallucinations
  • abdominal discomfort
  • diarrhoea
  • impaired kidney function or liver function

Very Rare Side Effects

  • Anaphylactic reactions
  • Blood changes including thrombocytopenia, leukopenia
  • Tremor, spontaneous muscle movements (ataxia), speaking disorders (dysarthria), convulsions


You must not take Valaciclovir if you:

  • Are allergic to any of the ingredients.
  • Are over 65
  • Have a weak immune system
  • Have kidney problems
  • Have liver problems

If you experience a serious allergic reaction (Swelling of the face, eyes or tongue, an itchy rash, or difficulty breathing), stop taking Valaciclovir immediately and see a doctor.


You should drink plenty of water while taking Valaciclovir to minimise your risk of dehydration.
You should not drive or operate heavy machinery if you feel dizzy or sleepy while taking medication.
Consult your doctor if you are trying to get pregnant, are pregnant or breastfeeding and wish to take Valaciclovir. 

Please note, that Superdrug Online Doctor is unable to provide treatment for pregnant women - please visit your local GP.

Drug Interactions

You must tell your doctor if you are taking any of the following medications before taking Valaciclovir:

  • Non-prescription herbal medicines
  • Medicines that affect the kidneys, including aminoglycosides, organoplatinum compounds, iodinated contrast media, methotrexate, pentamidine, foscarnet, theophylline, ciclosporin, tacrolimus, cimetidine and probenecid.

There is no known interaction between alcohol and Valaciclovir.

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Reviewed by: Dr Simran Deo in line with the Superdrug Online Editorial Process.

GMC no. 6141366

Dr Deo studied at St George’s, University of London and she specialises in dermatology.

Last reviewed on: 26/03/20