In more severe cases it can present with altered mental status, coma, hypotension, hypothermia and respiratory insufficiency.
Headache, altered mental status, seizures, coma. Nausea, vomiting, abdominal pain. Chest pain, cardiac dysrhythmias, palpations.
mental status, slurred speech, confusion, disorientation, difficulty concentrating, memory deficits, excessive sleepiness, weakness, abnormal gait, problems with muscle coordination