Singapore, Nov. 19 -- Gilead Sciences K.K. (Head office: Chiyoda-ku, Tokyo; President and Representative Director: Luc Hermans) and Eisai Co., Ltd. (Head office: Bunkyo-ku, Tokyo, CEO: Haruo Naito) have announced that Jyseleca(R) (filgotinib maleate 200 mg and 100 mg tablets), a new once-daily, oral, JAK (Janus kinase) inhibitor that preferentially inhibits JAK1, has been launched in Japan on November 18 for the treatment of rheumatoid arthritis (RA), with prior regulatory approval by the Japanese Ministry of Health, Labour and Welfare.Diseleca is a novel oral JAK inhibitor (once daily) that is selective for JAK1. The indication of diseleca is "rheumatoid arthritis (including prevention of structural damage to joints)", which is insuffici...