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What Is Haloperidol?

Haloperidol is a conventional antipsychotic medicine. Oral forms are used for certain psychotic disorders and to control motor or vocal tics associated with Tourette's disorder. Injectable forms have their own indications and dosing schedules.

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What Is Haloperidol?

Haloperidol is a conventional antipsychotic medicine. Oral forms are used for certain psychotic disorders and to control motor or vocal tics associated with Tourette's disorder. Injectable forms have their own indications and dosing schedules.

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How Haloperidol Works

Haloperidol changes the activity of dopamine in the brain. This action can reduce symptoms such as disturbed thinking or severe tics. Treatment can control symptoms, but it does not cure the underlying condition.

Forms and Dosing

Haloperidol comes as oral tablets and concentrated oral liquid. Short-acting and long-acting injections are given into a muscle by a healthcare professional. Follow the directions for the exact formulation prescribed.

Possible Side Effects

Sleepiness, restlessness, and movement problems can occur. Some movement problems can persist after treatment ends. Seek urgent care for high fever with muscle stiffness, fainting, or a severe reaction.

Precautions and Monitoring

Haloperidol is not approved for behavior problems in older adults with dementia. Tell your clinician about heart rhythm conditions, seizures, and all medicines you take. Do not change or stop a prescribed regimen without discussing it with your care team.

Frequently Asked Questions About Haloperidol

Is haloperidol an antipsychotic?

Yes. It is a conventional antipsychotic used for specific conditions.

Can haloperidol be taken by mouth?

Yes. Tablets and concentrated oral liquid are available.

Does haloperidol come as a long-acting injection?

Yes. Haloperidol decanoate is a long-acting injection given on a schedule set by a clinician.

Can haloperidol cause involuntary movements?

Yes. Report new, unusual, or persistent movements to your prescriber promptly.

References

Haloperidol. MedlinePlus. https://www.medlineplus.gov/druginfo/meds/a682180.html. Date Accessed October 6, 2026.

Haloperidol. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK560892/. Date Accessed October 6, 2026.

Haloperidol (Haldol): Uses & Side Effects. Cleveland Clinic. https://my.clevelandclinic.org/health/drugs/19626-haloperidol-tablets. Date Accessed October 6, 2026.

Haloperidol (oral route) - Side effects & dosage. Mayo Clinic. https://www.mayoclinic.org/drugs-supplements/haloperidol-oral-route/description/drg-20064173. Date Accessed October 6, 2026.

Haloperidol Injection. MedlinePlus. https://medlineplus.gov/druginfo/meds/a615023.html. Date Accessed October 6, 2026.