Cigarette smoke discolors teeth. Smoking can also lead to gum disease and lost teeth.
Ecstasy use causes involuntary teeth clenching. Some users need to wear dental mouth guards. Others actually use pacifiers.
A Case of the Blahs
All drugs of abuse can make users lose the
ability to feel normal happiness and pleasure.
How About a Mint?
Tar and nicotine from cigarettes build up on the teeth and tongue, leading to bad breath.