Which of the following is NOT a typical adverse effect of atropine?

Atropine, an anticholinergic agent, is known to block the action of acetylcholine at muscarinic receptors, leading to a range of physiological effects. The typical adverse effects of atropine stem from its blockade of parasympathetic nervous system activity, which includes symptoms such as tachycardia (increased heart rate), urinary retention (difficulty with urination), and blurred vision (due to pupil dilation and paralysis of the ciliary muscle leading to loss of accommodation).

In contrast, diarrhea is primarily associated with increased parasympathetic activity in the gastrointestinal tract. Anticholinergic agents like atropine typically lead to decreased gastrointestinal motility and secretions, resulting in constipation rather than diarrhea. Therefore, it is correct to identify diarrhea as not being a typical adverse effect of atropine. This understanding is crucial for recognizing the side effects that patients may experience when taking anticholinergic medications.