Parkinson’s appear delusion, if it is caused by the decline of brain function, you can use olanzapine and other anti-psychotic drugs, if it is due to amantadine and other drugs caused by hallucinations need to reduce the drug, while choosing other drugs. Drugs used to treat Parkinson’s disease, such as amantadine and phenazopyridine, have the side effect of causing hallucinations, and there is a probability of hallucinations if they are used for a long period of time. After the dosage is reduced, the hallucinations will be relatively reduced, but the symptoms of Parkinson’s disease may not be under complete control. The main core lesion of Parkinson’s disease lies in the brain changes in the nigrostriatal dopaminergic neurons of the midbrain, which will diffusely spread to the periphery, resulting in the peripheral cerebral cortex being affected, brain cell death, brain function decline, cognitive decline, and hallucinations, which are usually seen in the middle to late stages of Parkinson’s disease. For severe hallucinations, confusion, and blurred consciousness that are ineffective with medication adjustment, non-classical antipsychotics such as clozapine, quetiapine, olanzapine, etc. can be added. Specific drug use and changes in drugs and types of drugs need to consult the doctor in a timely manner, so that the doctor can make a choice according to the condition.