What adverse effect is not typically associated with the use of second generation antihistamines?

Second-generation antihistamines are designed to minimize sedation and other adverse effects compared to first-generation antihistamines. These medications have a lower affinity for crossing the blood-brain barrier, which is one of the reasons they generally cause less sedation, or somnolence, as well as reduced cognitive impairment.

Anticholinergic effects, such as dry mouth, urinary retention, and constipation, are more characteristic of first-generation antihistamines due to their mechanism of action which also affects acetylcholine receptors. Second-generation antihistamines are formulated to avoid significant anticholinergic activity, making such side effects less common or absent.

Therefore, the assertion that anticholinergic effects are not typically associated with second-generation antihistamines is accurate and underscores the therapeutic advantage of these newer agents in managing allergic rhinitis and other conditions, allowing patients to benefit from allergy relief with fewer side effects.