It comes in the form of a tablet you take by mouth. Valacyclovir is available as a brand-name drug called Valtrex. Generic drugs usually cost less than the brand-name version. In some cases, they may not be available in every strength or form as the brand-name drug. This drug may be used as part of a combination therapy. This means you may need to take it with other medications. Valacyclovir is used to treat viral infections caused by a group of viruses called herpes simplex viruses. These infections include oral and genital herpes, shingles, and chickenpox. The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers' package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist. The information presented by Healthnotes is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Diflucan for thrush Fluoxetine 40 mg weight loss Cytotec 200 mcg Ciprofloxacin antibiotic Valacyclovir has no known severe. drugs. Serious interactions of valacyclovir include. Apr 30, 2014. Acute kidney injury during concomitant use of valacyclovir and loxoprofen detecting drug-drug interactions in a spontaneous reporting system. Medscape - Herpes simplex, zoster-specific dosing for Valtrex valacyclovir, frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Drugs & Diseases. Valacyclovir belongs to the class of medications known as antivirals. It is used to treat a viral infection affecting the skin known as shingles (herpes zoster). It is also used to treat cold sores, and to treat and prevent recurrences of genital herpes. It works by interfering with the way the virus reproduces. Valacyclovir works by stopping the virus from multiplying and spreading to nearby healthy cells. It does not cure shingles, cold sores, or genital herpes, but it does help the sores to heal more quickly, and it relieves pain and discomfort. When used to prevent recurrences of herpes, it also reduces the risk of transmission (spreading) of the infection to others. Valacyclovir is used to treat herpes virus infections, including herpes labialis (also known as cold sores), herpes zoster (also known as shingles), and herpes simplex (also known as genital herpes) in adults. It is also used to treat chickenpox and cold sores in children. In your body, valacyclovir becomes the anti-herpes medicine, acyclovir. Although valacyclovir will not cure shingles or genital herpes, it does help relieve the pain and discomfort and helps the sores heal faster. Valacyclovir is available only with your doctor's prescription. This product is available in the following dosage forms: In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. For this medicine, the following should be considered: Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. Valacyclovir drug interactions Valtrex Valacyclovir - Side Effects, Dosage, Interactions - Drugs, Acute kidney injury during concomitant use of valacyclovir and. - NCBI Zithromax treats There may be an interaction between valacyclovir and any of the following. Valtrex - Uses, Side Effects, Interactions -. Valtrex valacyclovir dosing, indications, interactions, adverse effects.. Valacyclovir Drug Interactions -. Hypersensitivity to valacyclovir e.g. anaphylaxis, acyclovir, or any. No clinically significant drug-drug or drug-food interactions with VALTREX are known. Valacyclovir is an antiviral drug used to treat herpes zoster, or shingles, as well as recurrent episodes. Summary of Interactions with Vitamins, Herbs, & Foods. Valacyclovir may interact with other medications. An interaction is when a substance changes the way a drug works. This can be.