answers: psychotic
context: are the norm. Psychosis is also common. Parkinson's disease is a common neurological disorder characterized by a degeneration of dopamine neurons in the substantia nigra and a loss of dopamine in the putamen. It is described as a motor disease, but it also produces cognitive and behavioral symptoms. The most common treatment is dopamine replacement therapy, which consists in the administration of levodopa (L-Dopa) or dopamine agonists (such as pramipexole or ropinirole) to patients. Dopamine replacement therapy is well known to improve motor symptoms but its effects in cognitive and behavioral symptoms are more complex. Dopamine has been related to </s> reduction or cessation of therapy after long-term treatment. There is a higher chance of withdrawal reactions if the drug is administered in a higher dosage than recommended, or if a person stops taking the medication altogether without slowly allowing the body to adjust to a lower-dosage regimen. In 1992, Romach and colleagues reported that dose escalation is not a characteristic of long-term alprazolam users, and that the majority of long-term alprazolam users change their initial pattern of regular use to one of symptom control only when required. Some common symptoms of alprazolam discontinuation include malaise, weakness, insomnia, tachycardia, lightheadedness, and </s> Stimulant psychosis Stimulant psychosis, also known as stimulant-induced psychotic disorder, is a psychosis symptom which involves hallucinations, paranoia, and/or delusions and typically occurs following an overdose on psychostimulants; however, it has also been reported to occur in approximately 0.1% of individuals, or 1 out of every 1,000 people, within the first several weeks after starting amphetamine or methylphenidate therapy. The most common causative agents are substituted amphetamines, including substituted cathinones, as well as certain dopamine reuptake inhibitors such as cocaine or methylphenidate. The symptoms of stimulant psychosis vary depending on the drug ingested, but generally involve the symptoms of organic
question: what schizophrenic symptoms are decreased by drugs that selectively block the d2 dopamine receptor