This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 2, Subject name: Forensic Medicine
Hippus occurs in ______ Poisoning: 
Select and explain. 
A. Opium, B. Curare, C. Aconite, D. Datura
C: Aconite
Answer: C: Aconite 
Explanation: Aconite poisoning GIT: Nausea, vomiting, salivation, pain in the abdomen and diarrhea. Bitter-sweet taste, severe burning and tingling of tongue, mouth, perioral area and throat, followed by numbness. CVS: Hypotension, chest pain, palpitations, bradycardia, sinus tachycardia, ventricular ectopics and ventricular tachycardia/fibrillation. CNS : Veigo, restlessness, headache, giddiness. RS : Respiration is slow, labored and shallow. Ocular: pupils alternately contract and dilate (hippus). Diplopia and impaired vision occurs.