For smokers who have had trouble quitting on their own, the prescription medication Chantix might have seemed like a lifeline. A pill to help them quit smoking. But sometimes artificial help comes at a cost.

The FDA had previously released warnings that people taking Chantix may experience suicidal thoughts. More recent reports are showing that in addition, many users are experiencing extreme sleepiness and possibly even seizures. In fact, the Institute for Safe Medication Practices linked the medication to more than two dozen traffic accidents.

In response to the concerns, the Federal Aviation Administration banned use of the medication for pilots and air traffic controllers.