Your brain contains chemicals which help to carry messages from one part of the brain to another. One of these chemicals is called dopamine. It is thought that high levels of dopamine may cause the brain to function differently and may cause the symptoms of psychosis.
Antipsychotics work by blocking the effect of dopamine. This helps reduce psychotic symptoms for many people.
The Royal College of Psychiatrists say that the evidence suggests that nothing works as well as antipsychotic medications to treat schizophrenia.
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