Pfizer Inc sales folks had one tough customer in psychiatrist Stefan Kruszewski. He didn't buy their pitch to prescribe the anti-psychotic drug Geodon to children, a use that hadn't been approved by federal regulators.

Nor did he go for the so-called off-label uses they suggested, such as treating dementia in the elderly.

Kruszewski didn't just say no. He went and checked the research and saw Geodon could have serious cardiac side effects not mentioned by the salesmen, who boasted of its relative safety, according to his lawyer, Brian Kenney. And he noticed that Pfizer was paying his peers to promote the drug to other psychiatrists.