Date:24.09.2016, 00:57 Medications and other treatments for schizophrenia, when used regularly and as prescribed, can help reduce and control the distressing symptoms of the illness. However, some people are not greatly helped by available treatments or may prematurely discontinue treatment because. Hallucinations and Illusions Hallucinations and illusions are disturbances of perception that are common in people suffering from schizophrenia. Hallucinations are perceptions that occur without connection to an appropriate source. Although hallucinations can occur in any sensory form auditory (sound. While the prevalence of smoking in the U.S. population is about 25 to 30 percent, the prevalence among people with schizophrenia is approximately three times as high. Research has shown that the relationship between smoking and schizophrenia is complex. The mean age of onset of bipolar disorder in the sample was 32.9 (SD10.95 and 24.31 (SD4.88) for patients with schizophrenia. All participants were taking medications at the time of study enrollment, but patients did not receive benzodiazepine drugs.