Summary Depending on the outcoming call from チャオプラヤ・アパイプーベット病院Ayurvedic Andrographis paniculata growing in Thailand can be used for flu prevention. Several papers confirmed that this plant has anti-virus activity and related symptom like upper respiratory tract infection in vivo and in vitro. Since two Kampo medicines Maoto and/or Kakkonto are known as an anti-influenza drug in Japan, the combination with two old medicines might be accepted for the prevention of influenza virus infection.