CDC Recommendations for Management of Norovirus Gastroenteritis

Primary Management Approach

• Norovirus illness in otherwise healthy individuals typically resolves without specific treatment within 1–3 days. 1
• Approximately 10 % of cases require medical attention for hydration therapy (oral or intravenous). 1
• Patients should be isolated until 24–48 hours after symptom resolution to reduce transmission risk. 2

Rationale Against Routine Antiemetic Use

• The disease is self‑limited; most patients recover spontaneously in 1–3 days, although prolonged courses of 4–6 days can occur in young children, older adults, and hospitalized patients. 1
• The principal complication necessitating intervention is dehydration, not the act of vomiting itself. 1
• Vomiting contributes to viral shedding; suppressing it has not been shown to improve clinical outcomes. 1

Situations Where Antiemetics May Be Considered

• When vomiting is so severe that oral fluid replacement is impossible, antiemetics may be used to facilitate rehydration. 2
• In high‑risk groups—such as older adults and residents of long‑term care facilities—where norovirus‑associated deaths have been reported, antiemetic therapy may be contemplated. 1
• Hospitalized patients requiring intravenous hydration who experience prolonged illness may benefit from antiemetic administration. 1

Infection Control and Transmission

• Peak viral shedding occurs 2–5 days after infection, and individuals remain contagious during this period. 1
• Effective hand hygiene—washing hands with soap and water for at least 20 seconds—is essential; alcohol‑based hand sanitizers should be used only as an adjunct. 2