Rattling a plastic pill case, Larry Hagman made a personal appeal to Congress to lift the limit on how long Medicare pays for anti-rejection drugs. "I'm happy to be here," the actor and 1995 liver transplant recipient told a Capitol Hill news conference this week. "I'm happy to be anywhere. I'm not kidding." The man best-known for his portrayal of J.R. Ewing on TV's "Dallas" said the anti-rejection medicines inside his little blue pill case were literally keeping him alive. At roughly $11,000 per year, anti-rejection drugs can be prohibitively costly for people who must pay for them out-of-pocket, he said. Medicare currently pays for only three years worth of the drugs.