chlorpromazine vs fluphenazine
Side-by-side comparison of chlorpromazine and fluphenazine Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Thorazine
Prolixin
Chlorpromazine is a medicine that belongs to a class of drugs called phenothiazine antipsychotics. It can help manage symptoms of certain mental disorders by affecting chemical messengers in the brain.
Fluphenazine (Prolixin) is a medicine used to treat psychotic disorders. It helps manage symptoms like hallucinations and confused thinking.
Chlorpromazine can treat psychotic disorders like schizophrenia. It can also control nausea and vomiting. Additionally, it can help with restlessness before surgery, acute intermittent porphyria, tetanus, manic episodes of bipolar disorder, and intractable hiccups. In children, it can treat severe behavioral problems and hyperactivity.
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.
Chlorpromazine works by changing the effect of certain natural chemicals in the brain. It blocks dopamine receptors, which helps to reduce psychotic symptoms. It also affects other neurotransmitters, such as histamine and acetylcholine.
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.
- • Drowsiness
- • Extrapyramidal symptoms (muscle stiffness, tremors, slow movement)
- • Drowsiness
- • Restlessness
- The medicine is not working 527
- Using the medicine for a purpose it is not approved for 432
- Harmful effects from different substances 426
- Taking too much medicine 345
- Medicines affecting each other 322
- Drowsiness 19
- Medicine not working 15
- Feeling worried or nervous 13
- Trying to harm yourself 12
- Mental disorder affecting behavior 11
Antipsychotic medicines like chlorpromazine can increase the risk of death in elderly patients who have dementia-related psychosis. Chlorpromazine is not approved for treating this condition.
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.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if chlorpromazine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking this medicine during pregnancy and breastfeeding.
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.
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How to Read This chlorpromazine vs fluphenazine Comparison
chlorpromazine is classified in the Typical Antipsychotic (Phenothiazine) drug class, while fluphenazine 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, chlorpromazine has 2,052 submissions while fluphenazine has 70. 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 chlorpromazine and fluphenazine — 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.