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John F. Quinlan, M.D.
JAMA. 1937;109(24):2006. doi:10.1001/jama.1937.02780500062027.
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To the Editor:—  Though Dr. J. P. Quigley's article (The Journal, October 23, p. 1363) is of value in offering pharmacologic evidence for the clinical effectiveness of belladonna derivatives in idiopathic hypoglycemia, his "warning against the administration of atropine preparations" in these conditions, based on observations interpreted as delayed synergistic action, is not justified. Aside from the facts that idiopathic hypoglycemia, most frequently, is not due to hyperinsulinism, and that the transitory beneficial action of belladonna derivatives on hypoglycemic manifestations would naturally be followed by an aggravation of the preceding condition as the effect of the drug wore off, doses of atropine or novatropine respectively greater than 1/100 grain (0.65 mg.) or 1/25 grain (2.5 mg.) under no circumstances can be considered "moderate." When average doses of belladonna derivatives by mouth are not infrequently followed by dryness and dilatation of the pupils, surely subcutaneous doses of atropine as large as


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