Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Haloperidol (Haldol) and chlorpromazine (Thorazine) are both typical antipsychotics, but they have some key differences. Haloperidol is primarily used to treat schizophrenia and is available in oral forms, as well as a long-acting injection given monthly or as a short-acting injection for acute agitation. In contrast, chlorpromazine has a broader range of uses, including treating schizophrenia, nausea, vomiting, pre-surgery anxiety, and severe behavioral issues in children. Chlorpromazine is available in oral, intramuscular, and intravenous forms. Both medications can cause weight gain, movement-related side effects, and drowsiness, but Haloperidol can also prolong the QT interval. Both medications carry a higher risk of death in older adults with dementia-related psychosis and can cause serious side effects like neuroleptic malignant syndrome.
Haloperidol injection
Chlorpromazine
Haloperidol injection
Chlorpromazine
Summary of Haldol vs. Chlorpromazine
Summary for Typical antipsychotic
Prescription only
Haloperidol injection is an antipsychotic medication that's used to treat schizophrenia. It's a long-acting injection that's given into the muscles monthly by a healthcare provider. It's also available as a shorter-acting injection that's typically given in a hospital setting to people who are experiencing agitation related to schizophrenia. The most common side effects of haloperidol injection are movement-related side effects, such as rigid muscles, tremors, and trouble speaking.
Summary for Typical antipsychotic
Prescription only
Chlorpromazine is an antipsychotic medication used to treat many conditions that affect the brain and nervous system, including schizophrenia, bipolar disorder, and ongoing hiccups. It works by blocking certain chemicals in the body, like histamine and dopamine. Your dose depends on why you’re taking it and how severe your symptoms are, but it’s usually taken three or four times a day. Common side effects include drowsiness and movement problems.