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Author: Admin | 2025-04-28
Valtrex vs. Famvir: What's the difference?What is Valtrex? What is Famvir? What are the side effects of Valtrex and Famvir?What is the dosage for Valtrex vs. Famvir?What drugs interact with Valtrex and Famvir?Are Valtrex and Famvir safe to use while pregnant or breastfeeding? Valtrex vs. Famvir: What's the difference?Valtrex (valacyclovir) and Famvir (famciclovir) are antiviral drugs used to treat infections with shingles (herpes zoster), genital herpes (herpes simplex genitalis), and cold sores (herpes labialis).Side effects of Valtrex and Famvir that are similar include headache, nausea, vomiting, reduced white blood cells, diarrhea, and rash.Side effects of Valtrex that are different from Famvir include abdominal pain, cold symptoms, increased liver enzymes, joint pain, and dizziness.Side effects of Famvir that are different from Valtrex include fatigue, flatulence, allergic reactions, serious skin reactions, yellowing skin and eyes (jaundice), abnormal liver function tests, and reduced platelets (thrombocytopenia).What is Valtrex? What is Famvir? Valtrex (valacyclovir) is an antiviral medication used to treat shingles (herpes zoster), genital herpes (herpes simplex genitalis), and cold sores (herpes labialis). Valtrex is a nucleoside analog that mimics a building block of DNA and stops the spread of herpes virus in the body by preventing the replication of viral DNA necessary for viruses to multiply. Other nucleoside analogs include acyclovir (Zovirax) and famciclovir (Famvir). Valacyclovir is a "prodrug," that in itself is not active. It is converted to acyclovir in the body and it is the acyclovir that is active against the viruses. (Acyclovir is available as a topical, oral, and intravenous medication.) Valacyclovir is active against the same viruses as acyclovir, but it has a longer duration of action than acyclovir and may be taken fewer times each day.Famvir (famciclovir) is an antiviral drug active against the Herpes viruses, including herpes simplex 1 and 2 (cold sores and genital herpes) and varicella-zoster (shingles and chickenpox). It is a nucleoside analog that mimics one of the building blocks of DNA. It stops the spread of herpes virus in the body by preventing the replication of viral DNA that is necessary for viruses to multiply. Other nucleoside analogs include acyclovir (Zovirax) and valacyclovir (Valtrex). Famvir is actually a "prodrug," that is, not active directly against viruses. Instead, Famvir is converted to penciclovir in the body, and it is the penciclovir that is active against the viruses. Famvir is active against the same viruses as acyclovir but has a longer duration of action so it can be taken fewer times each day. Famvir does not cure or stop the spread of herpes infections. Famvir relieves pain, burning, itching, and tingling, and also heals and prevents sores associated with herpes infections. What are the side effects of Valtrex and Famvir?ValtrexThe side effect profile of Valtrex
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