Varicella zoster virus infection can cause different conditions throughout life, from the familiar itchy rash of chickenpox in childhood to painful shingles decades later. Managing these infections depends on understanding which form of the illness a person has, their age, overall health, and immune system strength.

How Treatment Decisions Are Made for Varicella Zoster Infections

When someone develops a varicella zoster virus infection, whether as chickenpox or shingles, treatment planning begins with understanding the person’s individual situation. The main goals focus on reducing discomfort, shortening the duration of illness, preventing the spread to others, and avoiding serious complications that can affect the brain, lungs, or other organs.^[1]

Not everyone with chickenpox or shingles needs the same level of medical intervention. Healthy children with chickenpox often recover well with simple home care measures to manage itching and fever. However, adults, pregnant women, newborns, and anyone with a weakened immune system face higher risks of severe disease and typically require antiviral medications—drugs that fight the virus directly.^[2]

The timing of treatment matters significantly. Antiviral medicines work best when started early, ideally within the first 24 to 72 hours after the rash appears. This narrow window reflects how quickly the virus multiplies in the body during active infection.^[9] Healthcare providers also consider whether someone has chickenpox for the first time or if the virus has reactivated as shingles, since these scenarios may require different treatment approaches.

Treatment decisions also account for where the infection appears on the body. Shingles affecting the eye area or causing facial paralysis demands more urgent attention than a rash limited to the trunk. Similarly, signs of brain involvement, such as severe headache, confusion, or difficulty walking, require immediate hospital-based care.^[1]

Standard Medical Treatments for Chickenpox and Shingles

The cornerstone of treating varicella zoster virus infections involves antiviral medications that interfere with how the virus copies itself inside human cells. Acyclovir stands as the most widely used antiviral for both chickenpox and shingles. For chickenpox in otherwise healthy children, treatment typically consists of acyclovir taken by mouth at a dose of 20 milligrams per kilogram of body weight (up to 800 milligrams) four times daily for five days.^[15]

When chickenpox becomes severe enough to require hospitalization—which can happen in immunocompromised patients or when complications develop—acyclovir is given intravenously at 10 milligrams per kilogram every eight hours. This intravenous route delivers higher concentrations of the drug directly into the bloodstream, making it more effective for serious infections.^[9]

For shingles treatment, healthcare providers often prescribe valacyclovir or famciclovir instead of acyclovir because these newer medications offer better absorption from the digestive tract. Valacyclovir is typically given at 1000 milligrams three times daily, while famciclovir is dosed at 500 milligrams three times daily. Both are usually continued for seven to ten days, or until all blisters have crusted over.^[9]

The side effects of antiviral medications are generally mild. Some people experience nausea, headache, or diarrhea. Acyclovir can occasionally affect kidney function, particularly when given intravenously, so doctors monitor kidney health in hospitalized patients receiving this treatment.^[11]

For people exposed to varicella zoster virus who have never had chickenpox and are not vaccinated, especially if they have weakened immune systems, healthcare providers may recommend varicella zoster immune globulin (VariZIG). This treatment contains antibodies that can prevent chickenpox or make it less severe if given within 10 days after exposure, with the best results seen when given within four days.^[9]

Managing the intense pain associated with shingles requires additional medications beyond antivirals. Some doctors add a short course of corticosteroids—anti-inflammatory medications like prednisone—which may provide modest benefits in reducing pain and potentially decreasing the likelihood of long-lasting nerve pain after the rash heals.^[14]

For the persistent nerve pain called postherpetic neuralgia that can follow shingles, treatment approaches differ from acute infection management. Doctors may prescribe tricyclic antidepressants (such as amitriptyline) or anticonvulsants (like gabapentin or pregabalin) in low doses specifically to calm overactive nerve signals causing pain. Topical treatments including capsaicin cream (derived from chili peppers) or lidocaine patches applied directly to the painful skin can also provide relief.^[14]

Home Care and Supportive Measures

Beyond prescription medications, various home care strategies help people cope with chickenpox and shingles symptoms. For the intense itching of chickenpox, cool baths with added baking soda, uncooked oatmeal, or colloidal oatmeal products available at drugstores can soothe irritated skin. Calamine lotion applied to blisters provides additional itch relief.^[12]

Keeping fingernails trimmed short helps prevent skin damage from scratching. This matters especially in children, who may find it harder to resist scratching itchy blisters. When scratches do occur, washing hands thoroughly with soap and water for at least 20 seconds reduces the risk of bacterial infection entering broken skin.^[12]

People with active chickenpox or shingles should stay home from work, school, or childcare until all blisters have formed crusts. In vaccinated individuals who develop chickenpox with lesions that don’t crust, isolation continues until no new blisters have appeared for 24 hours. These isolation measures prevent spreading the virus to others who may be vulnerable.^[5]

Treatment for High-Risk and Complicated Cases

Certain groups face substantially higher risks from varicella zoster infections and require more intensive medical approaches. Immunocompromised individuals—including those with HIV/AIDS, cancer patients, organ transplant recipients, and people taking medications that suppress the immune system—typically need intravenous acyclovir even for localized shingles, at least initially, with treatment continuing for seven to ten days or longer depending on response.^[15]

Pregnant women who develop chickenpox face risks to themselves and their developing babies. Those who get chickenpox between five days before delivery and two days after giving birth put their newborns at particularly high risk. These newborns typically receive varicella zoster immune globulin immediately after birth to provide protective antibodies.^[9]

When varicella zoster virus affects the brain or its protective coverings—conditions called encephalitis or meningitis—patients require hospitalization and intravenous acyclovir. These neurological complications can cause symptoms including severe headache, fever, confusion, seizures, weakness on one side of the body, or difficulty coordinating movements. Treatment usually continues for 10 to 14 days, with the duration adjusted based on how the patient responds.^[22]

Shingles affecting the eye, known as herpes zoster ophthalmicus, typically requires referral to an eye specialist called an ophthalmologist. This form can lead to vision-threatening complications and needs careful monitoring and specialized treatment to preserve eyesight.^[9]

Experimental and Investigational Treatments in Clinical Studies

While standard antiviral treatments work well for most varicella zoster infections, researchers continue exploring new therapeutic approaches through clinical trials. These studies aim to find better ways to prevent complications, shorten illness duration, and address treatment-resistant infections.

One area of investigation involves alternative antiviral agents for cases where the virus has developed resistance to acyclovir. Foscarnet represents one such alternative that works through a different mechanism than acyclovir. Some case reports describe its use in immunocompromised patients whose infections persisted despite acyclovir treatment, suggesting resistance. However, foscarnet use requires careful medical supervision due to potential side effects, and infectious disease specialist consultation is recommended for these complicated situations.^[9]

Clinical trials examining varicella zoster virus treatments explore various phases of research. Phase I trials focus primarily on safety, determining whether a new drug or approach causes unacceptable side effects in small numbers of participants. Phase II trials expand to larger groups to assess whether the treatment actually improves outcomes like reducing pain, shortening rash duration, or preventing complications. Phase III trials compare new treatments directly against current standard therapies to determine if they offer meaningful advantages.^[2]

Some research investigates novel approaches to managing the persistent nerve pain of postherpetic neuralgia. These studies examine new formulations of pain medications, different combinations of existing drugs, and alternative methods of delivering treatments directly to affected nerves through specialized procedures or devices.

Researchers also study ways to boost the immune system’s ability to control varicella zoster virus reactivation, particularly in older adults and immunocompromised patients. These investigations may involve examining how certain medications or biological therapies might strengthen immune responses specifically against this virus.

Clinical trials testing new treatments for varicella zoster infections occur at medical centers across the United States and in other countries worldwide. People interested in participating typically need to meet specific criteria related to their age, type of infection, overall health status, and previous treatments. Healthcare providers can provide information about available studies and whether participation might be appropriate for individual patients.

Most Common Treatment Methods

• Antiviral Medications
  • Acyclovir taken by mouth (20 mg/kg up to 800 mg four times daily) or intravenously (10 mg/kg every 8 hours) for chickenpox, typically for 5-7 days
  • Valacyclovir at 1000 mg three times daily for shingles treatment for 7-10 days
  • Famciclovir at 500 mg three times daily for shingles treatment for 7-10 days
  • Most effective when started within 24-72 hours after rash onset
• Immune Globulin Therapy
  • Varicella zoster immune globulin (VariZIG) given to high-risk individuals within 10 days after exposure
  • Provides protective antibodies to prevent or reduce severity of chickenpox
  • Particularly important for immunocompromised patients, pregnant women, and newborns whose mothers developed chickenpox around delivery
• Pain Management for Shingles
  • Tricyclic antidepressants in low doses to control nerve pain
  • Anticonvulsant medications like gabapentin or pregabalin for neuropathic pain
  • Topical capsaicin cream applied to painful areas
  • Lidocaine patches placed directly on affected skin
  • Narcotic pain medications for severe cases
• Corticosteroid Therapy
  • Short courses of oral prednisone or similar medications added to antiviral treatment
  • May provide modest benefits in reducing acute shingles pain
  • Potentially decreases risk of postherpetic neuralgia
• Supportive Home Care
  • Cool baths with baking soda, uncooked oatmeal, or colloidal oatmeal products to relieve itching
  • Calamine lotion applied to blisters
  • Acetaminophen (never aspirin in children) for fever reduction
  • Keeping fingernails trimmed to prevent skin damage from scratching

Vaccination as Prevention Strategy

While not a treatment for active infection, vaccination represents the most effective strategy for preventing varicella zoster virus infections altogether. The chickenpox vaccine, introduced in the United States in 1995, has reduced chickenpox cases by more than 90 percent. Children typically receive two doses, with the first given between 12 and 15 months of age and the second between 4 and 6 years old.^[5]

For adults aged 50 and older, the shingles vaccine provides protection against virus reactivation. This vaccine significantly reduces both the likelihood of developing shingles and the severity of illness when it does occur. It offers particularly important protection against postherpetic neuralgia, the persistent pain that can last months or years after shingles.^[8]