<prompt> A patient ingested some unknown substance and presented with myoclonic jerks, seizures, tachycardia and hypotension. ECG shows a hea rate of 120min. The aerial blood revealed a pH of 7.25, pCO2of 30mm Hg and bicarbonate ions are 15mmolL. The most likely poisonous agent is:Amanita phylloidsEthylene glycolImipraminePhencyclidine  <response>: Ref: KDT 8TH ED. Features are typical of tricyclic antidepressant poisoning. TCAs posses anticholinergic activity that can result in tachycardia. These agents can lead to metabolic acidosis pH7.4, HCO324mmolL. Seizures and myoclonic jerks are other features of TCA poisoning. 