Lethal dose for metoprolol is 3090 mg/ kg. When a person takes excessive amounts of metoprolol, overdose symptoms may occur, including extremely low blood pressure, tiredness, or severe decrease in heart rate. If the overdose was recent, healthcare professionals may administer certain medicines or "pump the stomach."
For seroquel, there was a case where 44 pills of 200 mg were taken that brought adverse effects like hallucination and loss of appetite. Common symptoms include drowsiness, low blood pressure, and irregular heart rhythm. If the Seroquel overdose was recent, the stomach may be "pumped" or medicines may be given to counteract the effects of the overdose.