Rates of drug use for marijuana declined, while over-the-counter drug use increased for some teens.
City officials say they don't think the suit will prevent the ban from taking effect Friday.
A comprehensive smoking ban in Indiana could save over $84 million in costs that currently go to treating smoking-related illnesses and complications.
Results of a new report show sales of tobacco to minors are down to an all-time low.
State lawmakers are debating a bill that would ban smoking in public places.