How is shingles treated, and when should you start antiviral medication?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Shingles is treated with prescription antiviral medications such as acyclovir, valacyclovir, or famciclovir. These drugs are most effective when started within 72 hours of the rash appearing, helping to shorten the outbreak, reduce pain, and lower the risk of complications like postherpetic neuralgia.

Because that 72-hour window is so critical, it's important to act quickly if you suspect shingles. Taking a free, instant, online symptom check can help you clarify your symptoms and decide whether to seek urgent care—so you don't miss the treatment window that matters most.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Learn if shingles needs urgent care now Discover likely causes of your shingles symptoms See if your rash could be shingles Find OTC relief for shingles pain Find a shingles doctor near you Learn medically proven shingles home remedies Understand if symptoms may need evaluation

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Explanation

Shingles, also known as herpes zoster, is a painful rash caused by the reactivation of the chickenpox virus. To treat shingles, doctors often prescribe antiviral medications. These medications help reduce the severity and duration of the symptoms.

When to Start Antiviral Medication:

Antiviral drugs are most effective when started within 72 hours (3 days) of the first appearance of the rash. Starting treatment early can help lessen the pain and speed up the healing process.

Common Antiviral Medications:

Acyclovir
Valacyclovir
Famciclovir

These medications can help prevent complications like postherpetic neuralgia, which is a long-lasting pain that can occur after the rash has healed. If you're experiencing symptoms and aren't sure whether it could be shingles, you can check your symptoms with a free online assessment before seeing a healthcare provider to discuss treatment options.

(References)

Herne K, Cirelli R, Lee P, & Tyring SK. (1996). Antiviral Therapy of Acute Herpes Zoster in Older Patients. Drugs & aging, 8845591.
Davis LE, & King MK. (2001). Shingles (Herpes Zoster) and Post-herpetic Neuralgia. Current treatment options in neurology, 11487454.
Saguil A, Kane S, Mercado M, & Lauters R. (2017). Herpes Zoster and Postherpetic Neuralgia: Prevention and .... American family physician, 29431387.

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