Like the commercials. "This will enhance your eyesight! Side effects include rashes in uncomfortable areas, growing a third arm, and your head will explode!" (Not a real commercial, but you get it.)
there was this medication against diseases in some country. it had some side-effects because of which some people had to go to therapies for the rest of their lifes. the company classified these as "minor side effects" -_- someone in my class used that medication for his vacation, luckily nothing happened to him...