What Are the Symptoms of Parasympathetic Nervous System Toxicity?
When the parasympathetic nervous system is overstimulated by toxins, several symptoms can manifest. These include bradycardia (slowed heart rate), hypotension (low blood pressure), miosis (constricted pupils), and increased secretions (saliva, tears, and mucus). Gastrointestinal effects such as abdominal cramps and diarrhea are also common. In severe cases, respiratory distress can occur due to bronchoconstriction and increased bronchial secretions.