Chasing Merck, Eisai launches insomnia drug Dayvigo in JapanEisai has launched its insomnia drug Dayvigo in Japan, the second in a new class of medicines after Share XChasing Merck, Eisai launches insomnia drug Dayvigo in Japanhttps://pharmaphorum.com/news/chasing-merck-eisai-launches-insomnia-drug-dayvigo-in-japan/