Pharmalot -- The smoking-cessation drug has generated headlines over links to suicide, but the Pfizer pill is now being tied to other serious adverse events reported to the FDA, according to a study published in Drug & Therapeutics Bulletin. And the authors urge the FDA and Pfizer to conduct epidemiological studies to assess further risks and to issue new warnings. Wall Street, meanwhile, is worried the study will cause Chantix sales to go up in smoke.