Antipsychotics

What is the primary mechanism by which atypical antipsychotics differ from typical antipsychotics in reducing the risk of extrapyramidal symptoms (EPS)?

A 35-year-old male with schizophrenia, treated with olanzapine for 2 years, presents for a routine check-up. His BMI has increased from 24 to 31, and recent lab tests show elevated fasting glucose and dyslipidemia. Which of the following antipsychotics is most likely to cause a similar metabolic side effect profile?

A 28-year-old patient with chronic schizophrenia has failed trials of two different antipsychotics, including one atypical, each for an adequate duration and dose. The psychiatrist is considering initiating clozapine. Which of the following is an absolute prerequisite before starting clozapine therapy?

A 22-year-old male is brought to the emergency department with sudden onset of involuntary muscle spasms, including torticollis and oculogyric crisis, occurring shortly after receiving his first dose of haloperidol for acute psychosis. Which of the following is the most appropriate immediate treatment?

Aripiprazole and brexpiprazole are examples of antipsychotics that primarily exert their therapeutic effects through which of the following mechanisms?