State and federal lawmakers are working ...painkiller Zohydro ER permanently shelved, even as the head of the Food and Drug Administration defends the agency’s decision to approve the powerful opiate some critics call “heroin in a capsule.” Since its approval in Oct.... has come under scrutiny from members of Congress, state attorneys general, doctors and addiction specialists who have worked to block the pill from being sold in the U.S. FDA Commissioner Margaret Hamburg strongly defends the agency’s approval, arguing that Zohydro’s benefits outweigh the negative consequences. Sen. Joe Manchin, D-W.Va., say the agency should rescind its approval of the...