<prompt> McEwans pupil is seen inOpioid poisoningMercury poisoningAlcohol poisoningChronic lead poisoning  <response>: Stage of coma in ethyl alcohol poisoning The person may go to a stage of coma at a blood alcohol concentration of more than 300mg. There will be steorous breathing. The pulse is rapid and temperature is subnormal. Pupils remaining constricted. On slapping or pinching on the face, causes pupils to dilate and gradually return to constriction McEwans pupils ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 437 