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Psychosis is the loss of contact with reality. It may result in false beliefs called delusions or sensing things that are not really there (hallucinations).


Psychosis may be caused by changes in chemicals and/or structures of the brain. Some conditions associated with psychosis include:

The Brain
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Risk Factors

Factors that may increase your chance of psychosis include:

  • A family history of severe mental illness
  • Brain abnormalities
  • Complications during pregnancy or birth
  • Loss of parent during childhood
  • Poor family functioning
  • Substance abuse


Symptoms can vary but may include:

  • Hallucinations—hearing, seeing, smelling, tasting, or feeling things that are not actually there
  • Delusions—unusual or false beliefs
  • Confusion or disorientation
  • Sudden changes in mood or bizarre behavior


You will be asked about your symptoms and medical history. A physical exam will be done. Information about alcohol use, illegal drugs, prescription medications, supplements, and herbs will also be collected. A psychiatric evaluation will be done.

Bodily fluids may be tested to look for the presence of substances that can cause problems or to look for imbalance in the body. This can be done with:

  • Blood tests
  • Urine tests


Treatment will depend on the cause of your psychosis. Talk with your doctor about the best treatment plan for you. Hospitalization may be needed until the psychosis is managed. Options may include one or more of the following:

Psychological Therapy

Psychological therapy treatments are often recommended in addition to medication. There are several different types of therapies such as:

  • Cognitive behavioral therapy to change unhelpful thinking patterns
  • Family therapy to help your family cope with your condition and identify signs that you may need additional help such as wandering or self harm
  • Support groups to talk to others who have had similar experiences

The medical team will help determine which therapy or therapies may be best.


Medications may be recommended to control symptoms. The exact type or combination will depend on symptoms and causes. Some options include:

  • Antipsychotic medications—to change the action of certain chemicals in the brain and control abnormal thinking
  • Antidepressants
  • Anti-anxiety medications
  • Mood stabilizers


Prevention depends on the cause of psychosis. Those at risk for psychosis may be able to prevent a psychotic episode with careful management of related condition.

Revision Information

  • National Institute of Mental Health

  • Mental Health America

  • Canadian Psychiatric Association

  • Mental Health Canada

  • About the first episodes of psychosis. National Alliance on Mental Illness website. Available at: Accessed October 13, 2015.

  • Olin SC, Mednick SA. Risk factors of psychosis: identifying vulnerable populations premorbidly. Schizophr Bull. 1996;22(2):223-240.

  • Psychosis. Centre for Addiction and Mental Health website. Available at: Accessed October 13, 2015.

  • Psychosis. NHS Choices website. Available at: Updated April 22, 2015. Accessed October 13, 2015.

  • Psychosis. Rethink Mental Illness website. Available at: Updated February 2014. Accessed October 13, 2015.

The health information in this Health Library is provided by a third party. Parkridge Health System does not in any way create the content of this information. It is provided solely for informational purposes. It does not constitute medical advice and is not intended to be a substitute for proper medical care provided by a physician. Always consult with your doctor for appropriate examinations, treatment, testing, and care recommendations. Do not rely on information on this site as a tool for self-diagnosis. If you have a medical emergency, call 911.