A medicament based on antibodies contains an activated form of monoclonal, polyclonal, or natural antibodies to interferon in low or ultra-low doses prepared by multiple consecutive dilutions and exposure to external factors, preferably in accordance with homeopathic technology. In order to obtain antibodies, human or heterologous interferon alpha, beta, or gamma, including recombinant interferon, is used a mixture of various, mostly centimal, homeopathic dilutions being employed. A method of treating a pathologic syndrome, whose formation is affected by interferon, consists in the use of activated forms of antibodies to interferon alpha, beta, or gamma in low or ultra-low doses obtained by multiple consecutive dilutions and exposure to external factors.
