What Are the Side Effects of Aciclovir?

  • 18 April 2023 09:51:33
  • Views: 938

Aciclovir, also known as acyclovir, is a medication commonly prescribed to treat viral infections caused by herpes viruses, including genital herpes, cold sores, and shingles. While generally considered safe and effective, like any medication, aciclovir can cause side effects. In this article, we will explore the common and rare side effects of aciclovir, as well as some important safety considerations.

Common Side Effects of Aciclovir

Common side effects of aciclovir are usually mild and may include:

  • Headache
  • Nausea
  • Vomiting
  • Diarrhea
  • Dizziness
  • Fatigue
  • Skin rash

These side effects are generally temporary and resolve on their own without any medical intervention. However, if these side effects persist or worsen, it is important to notify your healthcare provider.

Rare but Serious Side Effects of Aciclovir

Although rare, aciclovir can cause more serious side effects that may require immediate medical attention. These may include:

  • Allergic reactions, such as rash, itching, swelling, or difficulty breathing
  • Changes in vision
  • Confusion
  • Hallucinations
  • Tremors
  • Seizures
  • Unusual bruising or bleeding
  • Yellowing of the skin or eyes (jaundice)

If you experience any of these symptoms, it is important to seek medical attention immediately.

Safety Considerations

Aciclovir is generally considered safe for most people when used as prescribed by a healthcare provider. However, there are some safety considerations to keep in mind:

  • Inform your healthcare provider about any allergies or medical conditions you have before starting aciclovir.
  • Let your healthcare provider know about all the medications you are taking, including prescription, over-the-counter, and herbal supplements, as they may interact with aciclovir.
  • Aciclovir may not be safe for pregnant or breastfeeding women, so it is important to discuss with your healthcare provider if you are pregnant, planning to become pregnant, or breastfeeding.
  • Aciclovir may interact with other medications, so it is important to follow the prescribed dosage and instructions provided by your healthcare provider.


Aciclovir is a commonly prescribed medication for the treatment of viral infections caused by herpes viruses. While generally safe and effective, it can cause some side effects, both common and rare. It is important to be aware of these potential side effects and to discuss any concerns or questions with your healthcare provider. Following the prescribed dosage and instructions, as well as informing your healthcare provider about any allergies, medical conditions, or medications you are taking, can help minimize the risk of side effects and ensure the safe use of aciclovir.