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What are the potential side effects of valacyclovir?

Last updated on December 18, 2020

  • Headache
  • Nausea
  • Stomach pain
  • Vomiting
  • Dizziness
  • Other less common side effects in adults include painful periods in women, joint pain, depression, low blood cell counts, and changes in tests that measure how well the liver and kidneys work. Kidney failure and nervous system problems are not common, but can be serious. They are more likely to occur in patients who have existing kidney issues. If you have pre-existing kidney issues, please let your doctor know in your request.

Please contact your doctor if you are concerned about any side effects.

If you are a SimpleHealth patient and have questions or concerns about Valacyclovir prior to your next refill, please send an email to with answers to the questions below.

  1. Have you started taking any new medications?
  2. Have you experienced any new allergies?
  3. Have you experienced any side effects?
  4. Have you been in the hospital or experienced transitions of care?
  5. Have you started using another pharmacy since the last fill?
  6. Do you believe the medication is effective?”
  7. Have you recently received a varicella or zoster vaccination?

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