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. metoprolol use 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. Clonidine seizures Levitra alcohol Valacyclovir oral tablet is a prescription medication used to treat or. Valacyclovir is used to treat viral infections caused by. Dosage for shingles. is tamoxifen necessary The recommended dosage of VALTREX for treatment of cold sores is 2 grams twice daily for 1 day taken 12 hours apart. Therapy should be initiated at the. Valtrex valacyclovir is a prescription medication used to treat shingles, cold sores, genital herpes. Common side effects are nausea, vomiting, and headache. Drug. 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 Dosage Guide with Precautions -, Valtrex Valacyclovir Hydrochloride Side Effects, Interactions. Prednisone and fast heart rate Valacyclovir works best if it is used within 48 hours after the first symptoms of shingles or genital herpes e.g. pain. For oral dosage form. Valacyclovir Oral Route Proper Use - Mayo Clinic Valtrex Pills valacyclovir generic Side Effects, and Dosage Herpes Zoster Virus shingles - POZ Valacyclovir, also known as Valtrex, is one of the most common medications used to treat oral herpes cold sores and genital herpes. duloxetine peripheral neuropathy Find out the dosage, uses, side effects, precautions, and the difference between Valacyclovir vs Acyclovir, two antiviral drugs used for shingles. This eMedTV Web page explains various valacyclovir dosing recommendations when treating conditions caused by the herpes virus, such as shingles, cold sores, and.