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Friday, August 05, 2005

Quit smoking with a pill

Researchers are racing to develop a potentially lucrative drug that would make smoking as treatable as erectile dysfunction, high cholesterol and acid reflux disease.

Major pharmaceutical companies and small startups see the potential for billions of dollars in sales for a vaccine or a nicotine-free pill that could end addiction at the chemical level for America's 50 million smokers.

"It's the biggest addiction market there is," said Dr. Herbert D. Kleber, a psychiatry professor and addiction researcher at Columbia University. "Is it realistic to be able to help addicts stop smoking and remain off with a pill? I think the answer is yes and we're working on a number of them."

While nicotine patches, gums, lozenges and sprays help wean smokers off cigarettes by slowly reducing their dependence on nicotine, researchers are tailoring drugs to mimic or block nicotine's chemical reactions with the body.

In Connecticut, researchers at Pfizer Inc. identified a brain receptor that nicotine binds to and designed a drug, varenicline, that latches to the same site. Varenicline is in Phase III testing, normally the last step before a company applies for approval from the Food and Drug Administration.

Researchers hope that the drug will attach to nicotine receptors in the brain, preventing overpowering cravings from setting in when someone stops smoking.

Read more: Quit smoking with a pill? Researchers say new drugs show promise

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