Famvir is a medical product that has been developed to combat various viruses. When developing, pharmacists have achieved that the viruses are destroyed directly from the cellular level. The use of the main active substance-penciclovir – helps to achieve very rare cases of repeated infection with viruses. Famvir not only reduces symptoms that are pronounced, but also minimizes the consequences after the disease, for example – post-herpetic neuralgia.
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Indications for the use of Famvir
The medication is prescribed for the following diseases:
Infectious diseases that were caused by herpes zoster. This group also includes post-herpetic neuralgia and ophthalmoherpes.
Infectious diseases that were caused by the first and second type of herpes, the primary infection, the suppression of re-infection.
Infectious diseases that were caused by herpes viruses in patients with reduced immunity.
Famvir at herpes.
Penciclovir is an active substance that fights viruses at the cellular level. Therefore, if you have any symptoms of herpes in the body – you need to start using the medicine.
The medication taken with herpes penetrates into those cells of the body that were infected with the virus. The medication is in infected cells for more than twelve hours and actively affects the very essence of the disease – viral replication of deoxyribonucleic acid is destroyed.
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Famvir for children.
Children are patients with unstable and weak immunity. Therefore, in the case of a viral disease of the child, it is possible to start taking the medication.
But be extremely careful before you start taking medicine for children. Because at the moment there are not enough published studies that prove an absolute guarantee of safe and effective treatment for the child.
Form of issue.
The medication has various forms of release. They depend on how many milligrams of the working substance is in one tablet.
Pills that are covered with a white shell. They are round, biconvex, have trimmed edges. On one side is written the engraving “FV”, on the reverse side the dosage is 125 milligrams.
Pills that are covered with a white shell. They are round, biconvex, have trimmed edges. On one side is written the engraving “FV”, on the reverse side the dosage is 250 milligrams.
Pills that are covered with a white shell. They are oval in shape, biconvex, have cut edges. On one side is written the engraving “FV500” – the dosage of the medication is indicated.
The medicine has the main active substance penciclovir. Famvir is soon transformed into penciclovir, which in turn demonstrates a negative activity against herpes viruses of the first and second type, the virus of varicella, the virus Epstein-Barr and cytomegalovirus.
Antiviral effects in the pharmacodynamics of Famvir as a result of transformation into penciclovir were manifested on different models of herpes in animals. In cells that have been infected with the virus, penciclovir is converted into monophosphate for a short period of time.
In those cells that were not susceptible to the herpes virus, the effect of penciclovir concentration of penciclovir triphosphate is very small – its index tends to zero. Accordingly, the pharmacodynamics of the drug can not adversely affect the healthy cells of the body and interacts only with infected locations.
Pharmacokinetics provides three stages of its activity after ingestion.
Absorption into the blood occurs within a few hours after administration. Bioavailability of Famvir reaches seventy seven percent.
Distribution in the body occurs on the infected cells simultaneously, regardless of the frequency of admission. With blood plasma, less than twenty percent of the drug binds.
Use of Famvir during pregnancy.
The use of the drug during pregnancy and lactating women has not been studied in detail and there has not been sufficient research. Therefore, the use of the drug during pregnancy and during lactation is not recommended. In extreme cases, the medication can be used if the woman’s health risk substantially exceeds all possible consequences.
Also, there are currently no publications on whether Famvir is given with breast milk from mother to child.
But there are experimental studies that show that penciclovir does not adversely affect the fetus.
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It is necessary to be cautious about taking this medication, as there are the following contraindications to the use of the drug.
It is necessary to replace the antiviral medication if you have an increased sensitivity to one of the components of the drug.
It is necessary to completely stop taking the medicine if you have hypersensitivity to penciclovir.