United Therapeutics Corporation (NASDAQ: UTHR) and SteadyMed Ltd. (NASDAQ: STDY) announced today the signing of a definitive merger agreement under which United Therapeutics will acquire SteadyMed for $4.46 per share in cash at closing and an additional $2.63 per share in cash upon the achievement of a milestone related to the commercialization of Trevyent®. The transaction, including the $75 million in contingent consideration, is valued at $216 million.