Infectious Disease Book

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Valacyclovir

Aka: Valacyclovir, Valtrex
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  1. Indications
    1. Herpes Zoster (Shingles)
    2. Genital Herpes (initial, recurrent or prophylaxis)
    3. Herpes Labialis (Oral Herpes)
  2. Dosing
    1. Herpes Labialis (Cold Sores)
      1. Adult: 2 grams PO q12 hours for 1 day
    2. Herpes Zoster (Shingles)
      1. Adult: 1 gram tid for 7 days
    3. Genital Herpes
      1. Initial: 1 gram PO bid for 10 days
      2. Recurrent: 500 mg PO bid for 3 days
      3. Prophylaxis (for up to 1 year)
        1. Immunocompetent (<9 episodes/year): 500 mg PO qd
        2. Immunocompetent (9 or more per year): 1000 mg PO qd
        3. HIV with CD4>100: 500 mg PO bid
  3. Adverse Effects
    1. Nausea or Vomiting
    2. Headache
    3. Dizziness
Medication Costs
Valacyclovir HCl (on 2/9/2012 at DrugStore.com)
Valacyclovir HCl 500mg Tablets #30 for $185.99 ($6.20/unit)
Valacyclovir HCl 1gm Tablets #30 for $340.99 ($11.37/unit)
Valtrex (on 2/9/2012 at DrugStore.com)
Valtrex 1gm Tablets #30 for $365.99 ($12.20/unit)
Valtrex 500mg Tablets #30 for $235.98 ($7.87/unit)
FPNotebook does not benefit financially from showing this medication data or their pharmacy links. This information is provided only to help medical providers and their patients see relative costs. Insurance plans negotiate lower medication prices with suppliers. Prices shown here are out of pocket, non-negotiated rates. See Needy Meds for financial assistance information.

valacyclovir (C0249458)

Definition (NCI) The hydrochloride salt of the L-valyl ester of the antiviral drug acyclovir. Orally administered, valacyclovir is rapidly converted to acyclovir which inhibits viral DNA replication after further conversion to the nucleotide analog acyclovir triphosphate by viral thymidine kinase, cellular guanyl cyclase, and a number of other cellular enzymes. Acyclovir triphosphate competitively inhibits viral DNA polymerase; incorporates into and terminates the growing viral DNA chain; and inactivates viral DNA polymerase. The greater antiviral activity of acyclovir against herpes simplex virus (HSV) compared with varicella-zoster virus (VZV) is due to its more efficient phosphorylation by HSV thymidine kinase.
Definition (CSP) used in the management of herpes simplex virus and varicella zoster virus infections and the prophylaxis of human cytomegalovirus infections.
Definition (NCI) A substance that is being studied in the prevention of fungal, bacterial, and viral infections in patients undergoing donor stem cell transplantation with cells that are infected with cytomegalovirus. It belongs to the family of drugs called antivirals.
Definition (PDQ) A synthetic valyl ester derivative of acyclovir, the antiviral valacyclovir is an acyclovir prodrug that, after metabolization, inhibits viral DNA replication through interference with thymidine kinase. It is used in the management of herpes simplex and varicella zoster infections, as well as prophylactically for human cytomegalovirus infections. Check for "http://www.cancer.gov/Search/ClinicalTrialsLink.aspx?id=257236&idtype=1" active clinical trials or "http://www.cancer.gov/Search/ClinicalTrialsLink.aspx?id=257236&idtype=1&closed=1" closed clinical trials using this agent. ("http://nciterms.nci.nih.gov:80/NCIBrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&code=C28235" NCI Thesaurus)
Concepts Organic Chemical (T109) , Pharmacologic Substance (T121)
MSH C084555
SnomedCT 324820003, 96098007
English valaciclovir, valacyclovir, VALACYCLOVIR, Valacyclovir product (product), Valaciclovir product (product), Valacyclovir, Valaciclovir, valacyclovir [Chemical/Ingredient], valACYclovir, Valaciclovir product, Valacyclovir (substance), Valacyclovir product, Valaciclovir product (substance)
Spanish valaciclovir (producto), producto con valaciclovir (producto), producto con valaciclovir, valaciclovir (sustancia), valaciclovir
Sources
Derived from the NIH UMLS (Unified Medical Language System)


Valtrex (C0592245)

Concepts Organic Chemical (T109) , Pharmacologic Substance (T121)
MSH C084555
English Valtrex, valtrex, valtrexs
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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