People that have certain conditions such as bone marrow transplants, kidney transplant, kidney disease, or extreme loss of body water will not be able to take Valtrex. People that have allergies to Acyclovir analogues will not be able to take Valtrex either. People with problems with their immune systems should discuss their health with their doctor before taking Valtrex. Immune system problems could be HIV, certain cancer therapies, and organ transplants. People with these conditions could develop a serious blood disorder called thrombocytopenic purpurea/hemolytic anemia.

If you are pregnant or may become pregnant while taking Valtrex, talk to your doctor. Valtrex has been classified by the FDA as a category B medication. It isn't expected to be harmful to an unborn baby, but all those effects aren't completely known, so, again, talk to your doctor. The Valtrex can pass into your breast milk and may hurt your baby. You should discuss this with your doctor before you take Valtrex.

People that are taking certain medications may not be able to take Valtrex because it could affect how Valtrex works or it could also increase the side effects. These medications include cimetidine and probenecid. If you are taking any of these medications, speak with your doctor or pharmacist. An interaction between two medications does not always mean that you must stop taking one of them. In many cases, interactions are managed by close monitoring. Talk to your doctor about how any drug interactions should be managed. Tell your doctor about all prescription, over-the-counter, and herbal medications that you are taking. Also tell him about any supplements you take. Since caffeine, alcohol, the nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them.

Author Resource– Joseph Phillips – Health article author specializing in men’s health issues. The author currently writes for a U.S. online pharmacy – http://www.viamedic.com

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