hal·​o·​per·​i·​dol | \ ˌha-lō-ˈper-ə-ˌdȯl , -ˌdōl\

Definition of haloperidol

: a depressant C21H23ClFNO2 of the central nervous system used especially as an antipsychotic drug

Examples of haloperidol in a Sentence

Recent Examples on the Web

First-generation antipsychotics include chlorpromazine, haloperidol, perphenazine, and fluphenazine, the NIMH says. Korin Miller, SELF, "5 Bipolar Disorder Treatments You Should Know About," 30 Nov. 2018 While this is a correlation rather than a causation, another study found that taking a substance called haloperidol, which disrupts dopamine’s effects within the brain, led to a measurable decrease in sensation seeking behaviour. Richard Stephens, Smithsonian, "The History and Psychology of Roller Coasters," 12 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'haloperidol.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of haloperidol

1960, in the meaning defined above

History and Etymology for haloperidol

hal- + piperidine + -ol entry 1

Keep scrolling for more

Learn More about haloperidol

Share haloperidol

Statistics for haloperidol

Last Updated

16 Dec 2018

Look-up Popularity

Time Traveler for haloperidol

The first known use of haloperidol was in 1960

See more words from the same year

Keep scrolling for more

More Definitions for haloperidol


halo·​per·​i·​dol | \ ˌhal-ō-ˈper-ə-ˌdȯl , -ˌdōl \

Medical Definition of haloperidol

: a butyrophenone antipsychotic drug C21H23ClFNO2 used especially to treat schizophrenia and to control the involuntary tics and vocalizations of Tourette's syndrome — see haldol

More from Merriam-Webster on haloperidol

Britannica.com: Encyclopedia article about haloperidol

Comments on haloperidol

What made you want to look up haloperidol? Please tell us where you read or heard it (including the quote, if possible).


the perfect form or example of something

Get Word of the Day daily email!

Test Your Vocabulary

Valentine's Day Quiz

  • happy-valentines-day
  • Which word used to mean sweetheart or darling?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!