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Valtrex instructions for use

The drug Valtrex is an antiviral agent of a wide range of effects, which is effective against herpes simplex viruses 1 and 2, cytomegalovirus and others.

Release form and composition of the drug

The drug Valtrex is available in the form of tablets for oral use, coated with a protective film coating. Each tablet contains 500 mg of the active active ingredient valacyclovir, as well as a number of excipients. The drug is packaged in cardboard packs in blisters of 10 pieces.

Pharmacological properties of the drug

After taking the pill inside the active active substances are rapidly absorbed into the general bloodstream. Under the influence of chemical processes, valaciclovir is converted to acyclovir. Acyclovir is marked by selective effects, that is, the drug penetrates only into the cells and tissues affected by the virus, without affecting healthy areas.

The active ingredients of the tablets have a high therapeutic activity against herpes simplex viruses type 1 and 2, cytomegalovirus, Epstein-Barr virus, chickenpox.


Valtrex tablets are prescribed to patients for the treatment and prevention of the following conditions:

  • Herpetic eruptions on the mucous membrane of the mouth, under the nose, above the upper lip;
  • Genital herpes;
  • Prevention of progression of cytomegalovirus infection on the background of blood transfusion or transplantation of internal organs;
  • Herpes zoster caused by the herpes simplex virus.


This drug is not prescribed for the treatment of patients with these conditions:

  • Individual hypersensitivity to the components of the drug;
  • Age up to 12 years;
  • Severe damage to liver or kidney function.

The drug is not prescribed for the treatment of patients with HIV infection.

Dosage and administration

Tablets are intended for ingestion. It is recommended to swallow the pill immediately, without chewing, drinking plenty of liquid. Depending on the diagnosis, the daily dosage of the drug is different.

According to the instructions for adult patients for the treatment of shingles, 2 Valtrex tablets are prescribed 3 times a day for 7 days.

For the treatment of infections caused by herpes simplex virus type 1 and type 2, the recommended dose of the drug is 500 mg 2 times a day. The course of treatment is at least 5 days. In the absence of a therapeutic effect, the patient should consult a doctor in order to clarify the diagnosis or the prescription of another medication.

Upon contact of the patient with a patient with herpes, it is recommended to undergo treatment as a prophylaxis. In this case, tablets are taken 1-2 times a day in 500 mg for 3-5 days. In chronic herpes infections, in order to prevent relapse, the patient should begin the course of therapy as soon as possible, even before the first clinical symptoms appear or immediately after the appearance of a burning sensation and itching at the intended site of the rash.

When genital herpes, the patient is prescribed 500 mg of the drug 2 times a day. It is recommended to undergo therapy at once to both sexual partners, otherwise the infection will be transmitted to each other. During the course of therapy, sexual contact should be avoided.

In order to prevent the development of cytomegalovirus infection during blood transfusion or transplantation of internal organs, a patient is prescribed 2 g of the drug per day, dividing them into 4 doses of 1 tablet of 500 mg. The duration of the course of therapy in this case, the doctor determines individually for each patient.

Use of the drug during pregnancy and breastfeeding

In medicine, there is not enough data on the safety of the main active ingredient on the development of the fetus in the womb, therefore, during pregnancy, Valtrex tablets can be prescribed to women only when the expected benefit to the mother is higher than the possible complications for the embryo. The doctor strictly controls the condition of the pregnant woman and, if negative effects develop, the therapy is immediately canceled.

Scientists have conducted numerous studies in animals, and no birth defects or developmental defects were found.

When you take the drug inside the active ingredients easily penetrate into breast milk and can enter the body of a child. If necessary, treatment of the drug in nursing mothers should closely monitor the reaction of the child. Valtrex is prescribed to nursing mothers in the minimum effective dosage.

Side effects

In most cases, this drug is normally tolerated by patients, but with increased individual sensitivity to the components of the tablet, the patient may develop the following side effects:

  • Nausea, abdominal pain;
  • Headaches;
  • Changes in the clinical picture of blood - thrombocytopenia, leukopenia;
  • In rare cases, the development of angioedema or anaphylactic shock;
  • Dyspnea;
  • Dizziness, hand tremor, ataxia, convulsions ;
  • Depression of consciousness when ingesting large doses of the drug;
  • Changes in liver function tests;
  • Increased eye sensitivity;
  • Impaired renal function.

Interaction with drugs

With simultaneous use of the drug Valtrex with antiviral agents or immunomodulators, the therapeutic effect of the drug is enhanced.

You should be careful while prescribing this drug with other drugs that are excreted by the kidneys, since an increased load on the urinary organs can lead to the development of serious complications such as renal failure.

Conditions of storage and release of the drug

Valtrex tablets are available in pharmacies without a doctor's prescription. The drug should be stored in a dark, cool place out of the reach of children. The shelf life of the drug is 3 years from the date of manufacture, at the end of this period the drug can not be taken orally.

Valtrex price

The average cost of the drug in pharmacies in Moscow ranges from 1,100 to 3,300 rubles per pack, depending on the number of tablets per pack.

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