WASHINGTON, D.C. --- The Federal Motor Carrier Safety Administration on May 22 issued a warning about the use of the anti-smoking drug Chantix and advised health care providers "to not qualify anyone currently using this medication for commercial motor vehicle licenses."

Chantix is manufactured by Pfizer. A new study, conducted by the nonprofit watchdog group Institute for Safe Medication Practices, reported that the drug has been linked to seizures, dizziness, heartbeat irregularity, diabetes and more than 100 accidents, the Wall Street Journal reported.

Pfizer told the newspaper that the report's findings are not inconsistent with the possible side effects listed on the drug's label.