Stop smoking drug concerns raised

From Samantha Poling, BBC Scotland - "It was launched as a wonder drug. A tablet to take the pain out of kicking the killer weed. Since it appeared on the market two years ago in the UK, almost 400,000 prescriptions for Champix have been written. Across the world, that figure is currently sitting at nine million. Champix, or varenicline, to give it its clinical name, was first licensed here in December 2006. It mimics the effects of nicotine on the body so it both reduces the urge to smoke and relieves withdrawal symptoms. In clinical trials, it proved more effective than alternative remedies at getting people to quit. For its makers - Pfizer - Champix has been a huge success. In its first full year on the market, the drug brought in a staggering $883m for the company. But about a year ago, I became aware of stories emerging in the media in which people who had taken Champix were said to have suffered severe depression..."