antipsychotics Flashcards
What is the primary aim of antipsychotic drugs in the treatment of schizophrenia?
The primary aim is to reduce the intensity of symptoms, particularly positive symptoms like hallucinations and delusions.
What are the two main types of antipsychotic drugs used to treat schizophrenia?
The two main types are typical and atypical antipsychotic drugs.
What symptoms do antipsychotic drugs primarily target in schizophrenia?
Antipsychotic drugs primarily target positive symptoms such as hallucinations and delusions.
What is the difference between typical and atypical antipsychotic drugs?
Typical antipsychotics are older drugs that primarily block dopamine receptors, while atypical antipsychotics affect both dopamine and serotonin receptors.
How do antipsychotic drugs work to alleviate symptoms of schizophrenia?
They work by reducing the intensity of symptoms, particularly by blocking dopamine receptors, which helps to reduce positive symptoms like delusions and hallucinations.
What are D2 receptors and their role in schizophrenia?
D2 receptors are a type of dopamine receptor believed to play a key role in the positive symptoms of schizophrenia.
How do typical antipsychotics alleviate positive symptoms of schizophrenia?
Typical antipsychotics alleviate positive symptoms of schizophrenia by blocking D2 receptors, reducing dopamine transmission.
Which positive symptoms of schizophrenia are reduced by blocking D2 receptors?
Blocking D2 receptors helps reduce positive symptoms such as hallucinations and delusions.
What additional effect does chlorpromazine have aside from blocking dopamine?
Chlorpromazine also has a sedative effect, which can help calm agitated patients.
Why is blocking D2 receptors important in treating schizophrenia?
Blocking D2 receptors is important in treating schizophrenia because it reduces dopamine transmission, which helps alleviate symptoms like hallucinations and delusions.
Are typical antipsychotics effective in treating both positive and negative symptoms of schizophrenia?
Typical antipsychotics are effective in managing positive symptoms but are generally less effective at addressing negative symptoms such as avolition or social withdrawal.
What are some common side effects of typical antipsychotics?
Typical antipsychotics are associated with side effects such as extrapyramidal symptoms, including involuntary muscle movements and tremors.
Why are typical antipsychotics less effective for negative symptoms of schizophrenia?
Typical antipsychotics primarily target dopamine receptors related to positive symptoms and do not address the brain regions involved in negative symptoms.
How do typical antipsychotics affect D2 receptors in the brain?
Typical antipsychotics act extensively on D2 receptors across the brain, which reduces dopamine transmission and alleviates positive symptoms.
What are extrapyramidal symptoms, and why do they occur with typical antipsychotics?
Extrapyramidal symptoms are involuntary muscle movements and tremors, which occur because typical antipsychotics block D2 receptors in areas of the brain that control movement.
What is the main advantage of atypical antipsychotics over typical antipsychotics?
Atypical antipsychotics carry a lower risk of extrapyramidal side effects, which are commonly associated with typical antipsychotics.
How do atypical antipsychotics differ in their effect on D2 receptors compared to typical antipsychotics?
Atypical antipsychotics block D2 receptors more selectively and temporarily, which reduces the risk of severe side effects.
Give two examples of atypical antipsychotics.
Examples of atypical antipsychotics include clozapine and risperidone.
What is the mechanism by which atypical antipsychotics reduce side effects?
Atypical antipsychotics temporarily bind to D2 receptors and then rapidly dissociate, allowing normal dopamine transmission to occur, reducing side effects.
When were atypical antipsychotics developed and why?
Atypical antipsychotics were developed in the 1970s to improve upon the limitations of typical antipsychotics, particularly to reduce side effects like extrapyramidal symptoms.
How do atypical antipsychotics differ from typical antipsychotics in terms of neurotransmitter targets?
In addition to targeting dopamine, atypical antipsychotics also act on serotonin and glutamate receptors, helping to improve both positive and negative symptoms.
How do atypical antipsychotics help with negative symptoms of schizophrenia?
Atypical antipsychotics help address negative symptoms like social withdrawal, emotional flattening, and cognitive impairments by acting on serotonin and glutamate receptors.
Which atypical antipsychotic is particularly effective for patients who have not responded to other treatments?
Clozapine is particularly effective for patients who have not responded to other treatments and is known to improve mood and cognitive functioning.
Why is clozapine suitable for individuals at risk of suicide?
Clozapine is suitable for individuals at risk of suicide because it has been shown to improve mood and cognitive functioning.