The possibility of offering the first treatment in the U.S. for neurological muscle spasms that bears no warning of sedative side effects in the label attracted the interest of Sofinnova Ventures, which led to a $60 million series A round for Neurana Pharmaceuticals Inc. Funds will be used to support an upcoming phase II study testing a highly purified version of muscle relaxant tolperisone in neuromuscular spasms of the neck and back.