What Is Compazine? Uses, Side Effects & More

Severe nausea or vomiting can make it difficult to eat, drink, or keep up with daily activities. In some cases, a healthcare provider may prescribe a medication called Compazine to help control these symptoms. The drug also has uses in certain mental health conditions.

So, what is Compazine? Compazine is a brand name associated with prochlorperazine, a prescription medication in the phenothiazine drug class. Prochlorperazine is used to control severe nausea and vomiting and to treat schizophrenia. It can also be prescribed for short-term treatment of generalized nonpsychotic anxiety, although the FDA-approved labeling notes that it is not a first-choice treatment for most people with this type of anxiety.

What Is Compazine and What Is It Used For?

Prochlorperazine has both antiemetic, or anti-nausea, and antipsychotic effects. Its approved uses include controlling severe nausea and vomiting and treating schizophrenia. Short-term use for generalized nonpsychotic anxiety is another labeled indication, but other treatments are generally preferred because prochlorperazine carries risks that some alternatives do not.

Compazine is associated with a brand formulation of prochlorperazine, while generic forms are also available. U.S. patients who have a prescription and want to review product information can visit the Canada Pharmacy Compazine (prochlorperazine) product page.

How Does Prochlorperazine Work?

Prochlorperazine affects dopamine signaling in the brain. Dopamine is a chemical messenger involved in movement, mood, behavior, and other functions. By blocking certain dopamine activity, prochlorperazine can reduce signals involved in nausea and vomiting. Its effects on dopamine also contribute to its antipsychotic action in schizophrenia.

Your healthcare provider determines whether prochlorperazine is appropriate based on your symptoms, medical history, other medications, and expected length of treatment.

Common Side Effects of Compazine

Side effects vary from person to person. Prochlorperazine may cause dizziness, blurred vision, dry mouth, constipation, difficulty urinating, restlessness, or changes in movement. It can also cause drowsiness and may affect thinking, coordination, or balance, particularly when treatment begins.

More serious reactions can include tardive dyskinesia, which causes involuntary movements, and neuroleptic malignant syndrome, a rare but potentially life-threatening reaction that can involve high fever, severe muscle stiffness, confusion, and changes in heart rate or blood pressure. Seek prompt medical attention for severe or unusual symptoms.

For a patient-friendly overview of additional adverse effects, see MedlinePlus prochlorperazine drug information.

Precautions and Important Safety Information

Prochlorperazine should not be used by people with a known allergy to phenothiazines or in certain situations involving severe central nervous system depression. Alcohol and some medications that cause sedation can increase its effects, so patients should tell their healthcare provider about all prescription drugs, over-the-counter medicines, and supplements they use.

The medication also carries an FDA boxed warning concerning older adults with dementia-related psychosis. Antipsychotic medications are associated with an increased risk of death in this population, and prochlorperazine is not approved to treat dementia-related psychosis.

Discuss pregnancy, breastfeeding, driving, alcohol use, and other health conditions with your healthcare provider before taking prochlorperazine. Do not stop or change a prescribed medication without medical guidance.

Compazine may be useful for specific conditions, but its benefits and risks need to be considered for each patient. Speak with a licensed healthcare professional or pharmacist if you have questions about whether prochlorperazine is suitable for you. This article is for general educational purposes and does not replace professional medical advice.

Is Compazine the same as prochlorperazine?

Compazine is a brand name associated with prochlorperazine. Prochlorperazine is the active medication responsible for its therapeutic effects.

What is Compazine mainly used for?

Prochlorperazine is prescribed primarily to control severe nausea and vomiting and to treat schizophrenia. It also has a labeled short-term use for generalized nonpsychotic anxiety, although it is generally not a first-choice treatment for that purpose.

Does Compazine make you sleepy?

It can. Prochlorperazine may cause drowsiness and can impair mental or physical abilities. Patients should avoid driving or operating machinery until they know how the medication affects them.

Is Compazine appropriate for older adults?

Age alone does not determine whether someone can use prochlorperazine. However, the medication carries a boxed warning for older adults with dementia-related psychosis and is not approved to treat that condition. A healthcare provider should assess individual risks and benefits.