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Zovirax (acyclovir) is an antiviral medication used to treat infections caused by herpes simplex viruses, including genital herpes (HSV-2), oral herpes or cold sores (HSV-1), and shingles (herpes zoster). It can be used to treat active outbreaks or taken daily as suppressive therapy to reduce how often outbreaks occur.

Acyclovir works by selectively inhibiting the herpes virus enzyme DNA polymerase. This stops the virus from copying its genetic material, which slows viral replication. It does not eliminate the virus from the body but reduces the severity and duration of outbreaks.

Most people notice improvement in symptoms within 2 to 4 days of starting treatment. Zovirax works best when started as early as possible after symptoms appear, ideally within 24 to 48 hours of the first signs of an outbreak such as tingling, itching, or blistering.

Common side effects of oral acyclovir include nausea, headache, vomiting, and diarrhea. Most side effects are mild and temporary. Rare but serious side effects include kidney problems, which is why staying well-hydrated during treatment is recommended. Contact your physician if you experience confusion, reduced urination, or swelling.

Yes. Daily suppressive therapy with acyclovir is a well-established approach for people who have frequent genital herpes outbreaks (typically six or more per year) or who want to reduce the risk of transmitting the virus to a partner. Your physician will determine the appropriate suppressive dose based on your history.

Acyclovir is cleared by the kidneys, so dose adjustments are required for people with impaired kidney function. During your Doctronic evaluation, your physician will review your kidney health history to determine a safe and effective dose for you. It is important to drink plenty of fluids while taking acyclovir.

Doctronic uses an AI-guided evaluation to gather detailed information about your symptoms and health history. A licensed, board-certified physician then reviews your information, determines whether treatment is appropriate, and creates a personalized treatment plan. The entire process is secure, HIPAA-compliant, and available from home.

Yes. Doctronic connects you with real, licensed physicians who are credentialed and practice in your state. All consultations are doctor-reviewed and audited for quality, and your personal health information is protected under HIPAA. Doctronic is available to adults 18 and older in any U.S. state.