FYI - the Federal Aviation Administration (FAA) has banned pilots and air traffic controllers from using the prescription anti-smoking drug CHANTIX® (varenicline), manufactured by Pfizer, after new information became available about possible side effects that could impact aviation safety. The action was taken after a medical safety group, the Institute for Safe Medication Practices, released the results of a study that "found evidence for the occurrence of seizures, loss of consciousness, heart attacks, vision problems, and various psychiatric instabilities in individuals who use the drug."
FAA News Release about the Chantix ban.
The report that prompted the ban:
Strong Safety Signal Seen for New Varenicline Risks
Nicotine replacement (patch, gum, lozenges) are still allowed, of course.