Which adverse effect is commonly associated with cholinergic drugs?

Cholinergic drugs stimulate the parasympathetic nervous system, which can lead to increased secretions and enhanced gastrointestinal motility. Consequently, diarrhea and urinary urgency are common adverse effects associated with cholinergic medications. These drugs promote contractions in the gastrointestinal tract and the bladder, resulting in an increase in bowel movements and a strong, often urgent, need to urinate. This aligns with the expected physiological effects of cholinergic stimulation, leading to the correct identification of these symptoms as adverse effects of such medications.