Bad things tend to happen when Two and a Half Men star Charlie Sheen is not working. This morning, Sheen was taken to the hospital with severe abdominal pain, the actor’s publicist Stan Rosenfield confirmed. Men is on hiatus this week, so Sheen is not due back to work until Tuesday. It is not clear if his illness will affect the show’s production schedule. Earlier this month, Sheen briefly saw a doctor for what was described as an ear infection. This is the fourth incident involving Sheen that has happened while he is off the show, following his Christmas 2009 arrest in Colorado, his November New York hotel room episode that resulted in a trip to the hospital and his recent Las Vegas weekend escapade. Today’s hospitalization comes hours after Sheen’s Men co-star Jon Cryer joked on Conan last night that he checks TMZ every morning to see if he should go to work. (Today’s Sheen hospital visit story was broken by the gossip site, which provides salacious details about heavy partying that allegedly preceded it.) And at TCA, CBS entertainment president Nina Tassler acknowledged the network brass are concerned on a “on a personal level, but (Sheen) has his job, he does it well, and the show is a hit.” As we previously reported, CBS and Men producer Warner Bros. TV have been looking for ways to get Sheen to seek professional help for his addiction, including shutting down production on the show, but Sheen has refused to do so and has retained top litigator Marty Singer, threatening to sue the studio if they stop production.