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To the Editor:
—I have just seen in The Journal, Dec. 3, 1932, page 1944, an article written by Dr. J. C. Geiger in which he mentioned several case histories of cyanide poisoning with and without the use of methylene blue (methylthionine chloride, U. S. P.).The action of methylene blue on cyanide and carbon monoxide has been known a long time in theoretical biology, but I was first to suggest that it be used as an antidote for cyanide and carbon monoxide poison cases, as a result of some studies which I made on animals under a grant from the medical school here, and as a result of extensive reading which I have done.At a meeting of the Society for Experimental Biology and Medicine, which took place last April, Dr. Hanzlik heard my paper on the use of methylene blue as an antidote for cyanide and carbon monoxide
Brooks MM. METHYLENE BLUE AS ANTIDOTE FOR CYANIDE AND CARBON MONOXIDE POISONING. JAMA. 1933;100(1):59. doi:10.1001/jama.1933.02740010061028