Stedman's Shorter Medical Dictionary

Poisons & Antidotes
by T. L. Stedman, M.D., Wilcox & Follett Co., 1942

---Opium---
Symptoms: Drowsiness; slow strong pulse; slow and shallow breathing; strongly contracted pupils; at first can be easily aroused and is mentally rational, but sleep quickly returns and finally passes into coma.

Treatment: Emetics or preferably lavage with tannin or potassium permanganate (1% solution) in the water, repeated every 15 minutes; keep patient awake by walking, electricity, flagellation, or cold douches; heat to surface of body; strong hot coffee, strychnine, amyl nitrite inhalation, artificial respiration.