What is a common adverse reaction associated with antipsychotic medications?

Antipsychotic medications are widely used to manage conditions such as schizophrenia and bipolar disorder, but they can also lead to various adverse reactions. One common side effect associated with these medications is dry mouth. This occurs because antipsychotics can affect the autonomic nervous system, leading to reduced saliva production. A dry mouth can be uncomfortable and may also increase the risk of dental problems, as saliva plays a crucial role in maintaining oral health by neutralizing acids and washing away food particles.

In contrast, increased energy levels and enhanced cognitive clarity are not typical effects of antipsychotic medications. These drugs are often sedating and may lead to lethargy rather than a boost in energy or mental clarity. The option regarding weight gain with no other side effects presents an incomplete picture, as antipsychotics commonly lead to significant weight gain accompanied by metabolic changes and various other side effects. Thus, dry mouth stands out as a well-documented and common reaction to antipsychotic treatment among the options provided.