• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Any substance that chemically alters the functioning of the brain or nervous system is a drug. A psychoactive drug, also known as a psychotropic drug, is a chemical substance that affects consciousness, mood, perception, and/or behavior. Such drugs are often ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles