On one recent morning he quoted Edmund Burke to a group of high-school students and Winston Churchill to workers at a titanium-processing plant.

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Meanwhile, Targacept, a firm based in Winston-Salem, North Carolina, is looking at another group of nerve-cell proteins, the nicotinergic receptors, whose activation has been shown to increase alertness and may fend off cognitive decline.

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Winston Price, president-elect of the National Medical Association, an African-American physicians group, said that the current system--where patients might go to the doctor but then cannot afford drugs--is akin to sending people upstream in a canoe without a paddle.

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