Final answer:
The atypical antipsychotic drugs do not produce extrapyramidal side effects, hyperprolactinemia, or significant weight gain.
Step-by-step explanation:
The atypical antipsychotic drugs do not seem to produce extrapyramidal side effects, hyperprolactinemia, or weight gain.
Extrapyramidal side effects, such as involuntary muscle movements, are commonly associated with typical antipsychotics but are less likely to occur with atypical antipsychotics.
Hyperprolactinemia, a condition characterized by an elevated level of the hormone prolactin, is a common side effect of typical antipsychotics but is less prevalent with atypical antipsychotics.
Weight gain, although it can occur with atypical antipsychotics, tends to be less significant compared to typical antipsychotics.