When is antiviral treatment recommended for chickenpox?

Chickenpox, also called varicella, usually causes an itchy blistering rash and can include fever and tiredness. Many otherwise healthy children receive supportive care, but a clinician may consider an antiviral for an older child, an adult, someone with weakened immune defenses, or a person with a condition that raises the risk of complications. Timing matters because antiviral medicine is most useful when assessed early in the illness. Do not start someone else’s medicine without advice.

Contact a clinician promptly after the rash begins if the person is pregnant, an infant, an adult, immunocompromised, or taking medicines that suppress immunity. Rest, drink fluids, keep nails short, and use clinician-approved measures for itching. Avoid scratching and avoid aspirin in children. Chickenpox spreads easily, so stay away from people who are pregnant, newborn, or immunocompromised until a clinician confirms the contagious period has passed.

Seek urgent help for trouble breathing, severe drowsiness, confusion, repeated vomiting, dehydration, severe headache, a stiff neck, difficulty walking, or a rash that becomes very painful, hot, swollen, or produces pus. Get immediate advice for eye involvement or rapidly worsening illness. Call ahead before visiting a clinic so staff can reduce exposure to others.

Ask whether antiviral treatment is appropriate for the person’s age and health, how soon it should be started, which medicines are safe for fever or itching, and when normal contact with school, work, or vulnerable relatives can resume.