What Is Trifluoperazine? Uses, Dosage, and What You Need to Know in 2026

Trifluoperazine is a prescription antipsychotic medication with a long history in psychiatry. You may have heard of it by its former brand name, Stelazine — but today it is only available in the US as a generic. This guide explains exactly what trifluoperazine is, what conditions it treats, how it's dosed, and what patients need to know in 2026.

What Is Trifluoperazine?

Trifluoperazine is a first-generation (typical) antipsychotic medication in the phenothiazine chemical class. It was FDA-approved in 1959, making it one of the earlier antipsychotics available in the US. The brand name Stelazine is no longer sold in the United States, but generic trifluoperazine tablets remain commercially available from multiple manufacturers.

As a phenothiazine, trifluoperazine is chemically related to other older antipsychotics such as chlorpromazine and perphenazine. It is classified as a "high-potency" first-generation antipsychotic, meaning it is effective at relatively low doses — but also that it carries a higher risk of movement-related side effects (extrapyramidal symptoms) than lower-potency drugs.

What Is Trifluoperazine Used For?

Trifluoperazine has two FDA-approved indications:

Schizophrenia: This is the primary use. Trifluoperazine helps control symptoms of schizophrenia including hallucinations (hearing or seeing things that aren't there), delusions (false beliefs), disorganized thinking, and agitation. It can reduce both acute psychotic episodes and the risk of relapse when taken long-term as maintenance therapy.

Short-term management of generalized anxiety disorder (GAD): Trifluoperazine is approved for this use but with significant limitations: a maximum dose of 6 mg/day and a maximum duration of 12 weeks. Due to the risk of tardive dyskinesia with longer use, modern prescribing guidelines generally prefer benzodiazepines, SSRIs, or SNRIs for anxiety treatment. Trifluoperazine for anxiety is considered a second-line option.

What Forms Does Trifluoperazine Come In?

In the United States, trifluoperazine is currently available as oral tablets in four strengths:

1 mg tablets

2 mg tablets

5 mg tablets

10 mg tablets

An injectable (intramuscular) form was previously available in the US but has been discontinued. Outside the US, liquid oral solutions and injections may still be available in some countries.

What Is the Typical Dosage of Trifluoperazine?

Your prescriber will determine the right dose for you. Here are typical dosing ranges based on the indication:

Schizophrenia (adults): Starting dose is typically 2-5 mg twice daily. The total daily dose is often 15-20 mg/day for most patients, though some require up to 40 mg/day or more for adequate symptom control.

Anxiety (adults): Maximum 6 mg per day. Duration should not exceed 12 weeks. Doses above 6 mg/day for anxiety are not recommended.

Frequency: Usually taken twice daily (BID), though stable patients may be maintained on once-daily dosing in some cases.

How Should I Take Trifluoperazine?

Take trifluoperazine exactly as prescribed by your doctor. Do not increase or decrease your dose without consulting your prescriber.

It can be taken with or without food. Taking it with food may help if you experience stomach upset.

If you miss a dose, take it as soon as you remember — unless it's almost time for your next dose. Never double up to make up for a missed dose.

Do not stop taking trifluoperazine suddenly. Stopping abruptly can cause withdrawal symptoms and trigger a return of psychotic symptoms. Talk to your doctor before making any changes.

Store at room temperature (68-77°F), away from moisture and light.

How Long Does It Take for Trifluoperazine to Work?

For schizophrenia, optimum therapeutic response typically occurs within 2-3 weeks of starting trifluoperazine. You may notice some improvement in agitation and sleep sooner, but full antipsychotic effects — including reduction in hallucinations and delusions — take longer to develop. Do not stop the medication early if you don't see immediate results; give it the full recommended trial period while staying in contact with your prescriber.

Is Trifluoperazine Addictive or a Controlled Substance?

No. Trifluoperazine is not a controlled substance and is not considered habit-forming or addictive. You will not develop a physical dependence requiring dose escalation. However, your body does adapt to the medication over time, which is why stopping suddenly can cause withdrawal-like symptoms including nausea, vomiting, and dizziness. This is different from addiction.

For detailed information on side effects, see our guide on trifluoperazine side effects.

If you're having trouble filling your trifluoperazine prescription, medfinder can locate pharmacies near you that have it in stock.