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. 2023 Jun 30;10(2):157–168. doi: 10.5455/javar.2023.j665

Table 3. Summary of recommended doses of NAC for prevention and treatment of COVID-19.

Clinical signs and symptom Doses Route of administration References
Prevention
Mild 600 mg twice daily Oral [56,63]
Treatment
Mild 600 mg three time a day Oral [34]
Moderate 300 mg three time a day Intravenous [64]
Severe 300 mg 5–6 time a day Intravenous [36]