A habit-forming drug.
The taste of success can be habit-forming.
Many government prohibit the advertising of habit-forming substances to minors.
Less than two years ago, GlaxoSmithKline was running TV commercials on US nationwide TV claiming that paroxetine was " not habit-forming " .
Clients now carry out actions one by one - until they become habit-forming.
Hydrocodone is the habit-forming part of the drug mix in Vicodin.
Because they can be both physically and mentally habit-forming, they should be used only with medical supervision.