Acyclovir: Uses, Side Effects, and Drug Interactions

Brand names: Acyclovir

# Acyclovir Overview Acyclovir is a medicine used to treat infections caused by certain viruses, especially herpes simplex virus and chickenpox. When you get one of these infections, the virus makes copies of itself inside your body's cells. Acyclovir works by stopping the virus from making these copies, which helps your body fight off the infection. It can reduce pain, speed up healing, and help prevent the infection from spreading. Acyclovir comes in different forms, including pills, creams, and injections, depending on what type of infection you have and how serious it is. Like all medicines, acyclovir can cause side effects and may not be right for everyone. Some people should not take acyclovir if they are allergic to it or have certain medical conditions. It's important to tell your doctor about any other medicines you're taking, since acyclovir can interact with some drugs. Pregnant women, nursing mothers, and children need special care when using this medicine, so always follow your doctor's instructions carefully. If you experience unusual symptoms or side effects while taking acyclovir, contact your doctor right away.

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Most Reported Side Effects (FAERS)

  • FATIGUE7,688 reports
  • DIARRHOEA7,125 reports
  • OFF LABEL USE5,860 reports
  • PNEUMONIA5,525 reports
  • NAUSEA5,408 reports
  • PYREXIA4,804 reports
  • DEATH4,704 reports
  • DRUG INEFFECTIVE4,567 reports
  • RASH4,171 reports
  • DYSPNOEA3,517 reports

Source: FDA Adverse Event Reporting System (FAERS). Voluntary reports do not establish causation.

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SafeCheck provides drug interaction information from FDA-approved product labeling (openFDA). This is for informational purposes only and is not medical advice. Always consult your healthcare provider before making medication decisions.