Medically reviewed by Jessica Swirble, PharmD
Last updated on 5/2/2024

Drug Information | Side Effects | Use & Dosage | Request a Prescription

• Brand Name: Zovirax
  
• Generic Name: Acyclovir
  
• Uses: Treating viral infections such as herpes simplex, shingles, and chickenpox
  
• Drug Class: Antiviral
  
• Availability: Prescription only
  
• Generic Status: Yes
  
• Controlled Substance: No
  
  

Acyclovir is an antiviral medication used primarily to treat infections caused by certain types of viruses. It treats cold sores around the mouth (caused by herpes simplex), shingles (caused by herpes zoster), and chickenpox.

Acyclovir is primarily used to treat conditions such as:

• Herpes simplex virus infections: Helps reduce pain symptoms and speeds recovery.
  
• Shingles (herpes zoster): Aids in reducing pain and the length of the infection.
  
• Chickenpox: Helps reduce the length and severity of the disease.
  
  

It may also be used to treat outbreaks of genital herpes and to prevent recurrent outbreaks.

Acyclovir works by interfering with viral DNA synthesis, which reduces the virus's ability to replicate and spread. This helps to decrease the severity of infections and speed up the healing process.

Acyclovir can be taken in different forms, depending on the specific needs:

• Oral tablets: Typically taken several times daily.
  
• Topical cream: Applied to the affected area several times a day.
  
• Intravenous formulations: Used in more severe cases, administered by a healthcare provider.
  
  

The dosage and duration of treatment depend on the condition being treated, its severity, and your response to the medication.

Follow your healthcare provider's instructions regarding dosage and schedule. Do not exceed the prescribed dose or duration of treatment without consulting your provider.

The effectiveness of acyclovir and the time it takes to notice improvement can vary among individuals. Improvement in symptoms can usually be observed within a few days of starting the medication, but it may take longer to fully recover from the infection.

Continue taking acyclovir as prescribed even if you start feeling better. Do not abruptly stop the medication, as it may lead to a return of the infection.

While acyclovir is primarily used for managing viral infections, healthcare providers may sometimes prescribe it off-label for other viral infections not listed above.

Discuss any alternative uses of acyclovir with your healthcare provider.

Acyclovir is available in the following dosage forms:

• Oral tablets: Typically available in 400mg and 800mg dosages.
  
• Oral capsules: Available in 200mg dosage.
  
• Topical cream: For application to skin infections.
  
• Oral suspension: Available in 200mg/5ml dosages.
  
• Intravenous formulations: For severe infections.
  
  

Generic versions of acyclovir are available, providing cost-effective treatment options.

Acyclovir is a prescription medication. You will need a valid prescription from a licensed healthcare provider to obtain this medication.