Neurogen Corp.'s stock gained 64 percent Monday on news that it entered an exclusive worldwide alliance with Merck & Co. Inc. to discover and develop pain medications that target the vanilloid receptor, a key integrator of pain signals in the nervous system. (BioWorld Today)

Neurogen Corp.'s stock gained 64 percent Monday on news that it entered an exclusive worldwide alliance with Merck & Co. Inc. to discover and develop pain medications that target the vanilloid receptor, a key integrator of pain signals in the nervous system. (BioWorld Today)