fluphenazine vs perphenazine
Side-by-side comparison of fluphenazine and perphenazine Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Prolixin
Trilafon
Fluphenazine (Prolixin) is a medicine used to treat psychotic disorders. It helps manage symptoms like hallucinations and confused thinking.
Perphenazine is a medicine used to treat schizophrenia and control severe nausea and vomiting. It belongs to a class of drugs called typical antipsychotics.
Fluphenazine is used to manage the symptoms of psychotic disorders. These disorders can cause problems with thinking, feeling, and behavior. This medicine can help reduce hallucinations and other symptoms of psychosis.
Perphenazine is used to treat schizophrenia in adults. Schizophrenia is a mental illness that can affect how you think, feel, and behave. This medicine can also help control severe nausea and vomiting in adults.
Fluphenazine belongs to a class of drugs called typical antipsychotics. It works by changing the way certain chemicals in your brain work. This helps to reduce psychotic symptoms.
Perphenazine works by changing the levels of certain natural chemicals in the brain. These chemicals, called neurotransmitters, help to regulate mood and behavior. By affecting these chemicals, perphenazine can help reduce symptoms of schizophrenia and control nausea.
- • Extrapyramidal symptoms (muscle stiffness, tremors, slow movement)
- • Drowsiness
- • Restlessness
- • Muscle stiffness or spasms
- • Restlessness
- • Slow movements
- • Shaking
- • Weight gain
- Drowsiness 19
- Medicine not working 15
- Feeling worried or nervous 13
- Trying to harm yourself 12
- Mental disorder affecting behavior 11
- Medicine not working 357
- Harmful reaction to substances 274
- Weight gain 222
- Restlessness 184
- Attempt to end one's life 180
Fluphenazine may increase the risk of death in elderly patients with dementia-related psychosis. Fluphenazine is not approved for treating dementia-related psychosis. Tell your doctor right away if you have Neuroleptic Malignant Syndrome (NMS) symptoms like high fever, stiff muscles, confusion, sweating, fast or irregular heartbeat.
This medicine may increase the risk of death in elderly patients with dementia-related psychosis. Perphenazine is not approved to treat dementia-related psychosis. Talk to your doctor about the risks if you are an older adult with dementia.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if fluphenazine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking fluphenazine during pregnancy.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if perphenazine will harm an unborn baby. Talk to your doctor about the risks and benefits of taking this medicine while pregnant or breastfeeding.
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How to Read This fluphenazine vs perphenazine Comparison
fluphenazine is classified in the Typical Antipsychotic (Phenothiazine) drug class, while perphenazine sits within the Typical Antipsychotic (Phenothiazine) class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, fluphenazine has 70 submissions while perphenazine has 1,217. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between fluphenazine and perphenazine — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.