Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Haloperidol (Haldol) and perphenazine (Trilafon) are both typical antipsychotics used to treat schizophrenia, but they have some key differences. Haloperidol is available as oral forms, and an injection, either long-acting (given monthly) or short-acting (used in hospital settings), while perphenazine is taken orally multiple times a day. Haloperidol and perphenazine primarily work by blocking dopamine activity to reduce hallucinations and delusions. Perphenazine is unique in that it is also approved to treat severe nausea and vomiting, unlike haloperidol. Both medications can cause movement-related side effects, weight gain and other side effects like drowsiness and dizziness. Both medications carry serious risks for older adults with dementia-related psychosis, including a higher risk of death and stroke.
Haloperidol injection
Perphenazine
Haloperidol injection
Perphenazine
Summary of Haldol vs. Perphenazine
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 First generation (typical) antipsychotic
Prescription only
Perphenazine is a typical antipsychotic. It's used to treat schizophrenia, as well as severe nausea and vomiting in adults. Perphenazine comes as tablets that are taken by mouth, typically up to 3 to 4 times per day, depending on the condition. Side effects of this medication include sleepiness, insomnia, and changes in body weight (both weight gain and loss); drinking alcohol can worsen certain side effects. Brand name Trilafon has been discontinued; perphenazine is only available as a generic medication.