This article explains the differences between Valacyclovir and Acyclovir, two antiviral medications that are used to treat cold sores around the mouth and shingles. Shingles, also known as herpes zoster, is a common viral infection which is caused by the varicella-zoster virus. About 33 percent of people will develop herpes zoster in their lifetime, with approximately 1 million cases every year in the US. This virus is actually the same virus that causes chickenpox. The symptoms of this condition generally affect only a small section of one side of the body. These symptoms may include: Valtrex is the brand name for this antiviral drug. It works by slowing the growth and spread of the virus, thus, the body can fight off the infection. In 1995, it was approved for medical use and is manufactured by Glaxo Smith Kline, a British pharmaceutical company with headquarters in London. In the United States, it is available as a generic drug since 2009. Valacyclovir works best if it is used within 48 hours after the first symptoms of shingles or genital herpes (e.g., pain, burning, or blisters) begin to appear. For recurrent outbreaks of genital herpes, valacyclovir works best if it is used within 24 hours after the symptoms begin to appear. If you are taking valacyclovir for the treatment of chickenpox, it is best to start taking valacyclovir as soon as possible after the first sign of the chickenpox rash appears, usually within one day. Valacyclovir may be taken with meals or on an empty stomach. If you are using the oral suspension, use a specially marked measuring spoon or other device to measure each dose accurately. The average household teaspoon may not hold the right amount of liquid. Drink extra fluids so you will pass more urine while you are using this medicine. How to buy doxycycline in uk Buy accutane canada Herpes labialis cold sores. episode Dose 2000 mg PO q12h x1 day; Start ASAP after sx onset. *suppression Dose 500 mg PO qd; Info reassess tx need at. Find out the dosage, uses, side effects, precautions, and the difference between Valacyclovir vs Acyclovir, two antiviral drugs used for shingles. Also, taking lower doses of acyclovir, valacyclovir or famciclovir over time can help prevent shingles from recurring. However, this is usually recommended only. 24 hours after lesion onset) Suppressive therapy (immunocompetent patients): 1 g/day PO Suppressive therapy (immunocompetent patients with ≤9 recurrences annually): 500 mg/day PO; transmission reduction for source partner, 500 mg/day PO Suppressive therapy (HIV-infected patients): 500 mg PO q12hr Thrombotic thrombocytopenic purpura (TTP)/hemolytic uremic syndrome (HUS) reported in patients with advanced HIV disease and in allogenic bone marrow transplant and renal transplant recipients Acute renal failure (ARF) may occur, especially in elderly patients or those with underlying renal impairment receiving higher than recommended doses; use with caution in patients with renal impairment, the elderly, and/or patients receiving nephrotoxic drugs Treatment should begin with the earliest symptom (tingling, burning, itching) in cold sores; for genital herpes, it should begin at the first signs and symptoms (within 72 hours of onset of first diagnosis or 24 hours of onset of recurrent episodes); for herpes zoster, it should begin within 72 hours of onset of rash; for chicken pox, it should begin with the earliest sign or symptom Central nervous system (CNS) effects may occur (eg, agitation, hallucinations, confusion, encephalopathy); risk of CNS adverse effects is higher in elderly patients Adequately hydrate patient; decreased precipitation in renal tubules may occur Metabolized by liver; valacyclovir is rapidly and nearly completely converted to acyclovir and L-valine via first-pass effect; acyclovir is hepatically metabolized to a very small extent by aldehyde oxidase and by alcohol and aldehyde dehydrogenase (inactive metabolites) The above information is provided for general informational and educational purposes only. Individual plans may vary and formulary information changes. Contact the applicable plan provider for the most current information. Our free Discount Rx savings card can help you and your family save money on your prescriptions. This card is accepted at all major chain pharmacies, nationwide. Enter your name and email address to receive your free savings card. Our free Discount Rx savings card can help you and your family save money on your prescriptions. This card is accepted at all major chain pharmacies, nationwide. Enter your name and email address to receive your free savings card. When treating cold sores (herpes labialis) in adults and children at least 12 years old, the dose of valacyclovir is 2000 mg (2 grams), taken twice a day for one day. This site does not dispense medical advice or advice of any kind. Valacyclovir dosage for shingles Valacyclovir Dosing - Shingles Home Page, Valacyclovir vs Acyclovir - Which Is The Best Drug For Shingles? Levitra storiesPrednisone 50 mgViagra bangkokOrder prednisone online canada Valacyclovir Dosage for Shingles. Valacyclovir is also used to treat shingles -- a painful form of herpes skin rash caused by the varicella zoster virus. Valacyclovir Dosage Guide Cold Sores, Genital Herpes & More -.. Herpes Zoster Virus shingles - POZ. Valtrex Valacyclovir Hydrochloride Side Effects, Interactions.. Detailed dosage guidelines and administration information for Valtrex valacyclovir hydrochloride. Includes dose adjustments, warnings and precautions. Detailed Valacyclovir dosage information for adults and children. Includes dosages for Herpes Simplex - Suppression, Herpes Simplex Labialis, Herpes Zoster. Valtrex is the brand name for valacyclovir, an antiviral drug used to treat. In adults, it's prescribed for shingles herpes zoster, cold sores.