Final answer:
The adverse effects felt with cholinergic drugs are a result of the drugs' interactions with the parasympathetic nervous system. Cholinergic drugs enhance cholinergic effects, which means they activate or stimulate the parasympathetic system.
Step-by-step explanation:
The adverse effects felt with cholinergic drugs are a result of the drugs' interactions with the parasympathetic nervous system. Cholinergic drugs enhance cholinergic effects, which means they activate or stimulate the parasympathetic system. This can cause various adverse effects because the parasympathetic system is responsible for rest and digestion, and excessive activation can lead to symptoms such as increased salivation, sweating, and gastrointestinal discomfort.