Flaviviruses-IN-1 is an inhibitor of several viruses belonging to the Flaviviridae family, with activity to inhibit viral infection. Flaviviruses-IN-1 is able to specifically inhibit multiple viruses of the Flaviviridae family. The mechanism of action of Flaviviruses-IN-1 is related to the modulation of the host cell immune response to viral infection. Flaviviruses-IN-1 was identified as a potential candidate compound in a high-throughput screening. Flaviviruses-IN-1 provides a new strategy for inhibiting infections caused by the Flaviviridae family.