Entrepreneur: Jason Burke worked as an anesthesiologist in Las Vegas for seven years before he decided to launch a company that would help people with hangovers get back on their feet. “Aha” moment: While on duty in the recovery room, Burke-who still practices medicine a couple of days per week-realized that the same meds used to help post-op patients suffering from nausea, headache or dizziness could be a boon to the city’s party people.