JOHN J. AMBRE, M.D., Ph.D.
To the editor: I found the letter of Heckerling and Bartow (1) both confusing and unconvincing. An earlier report (2) of three cases, cited by the authors, indicates that cyclobenzaprine overdose is associated with the "classic" signs of anticholinergic intoxication. These signs, in addition to dry skin and mucous membranes, include bowel and bladder atony, pupillary dilatation, fever, and tachycardia. Of these, the only sign shown by the patients was sinus tachycardia, which could also be readily explained by the physical exertion involved in "extreme patient combativeness" and resisting "restraint." The urine sample was reported to contain pyrilamine (also an
AMBRE JJ. Cyclobenzaprine Overdosage. Ann Intern Med. ;102:559–560. doi: 10.7326/0003-4819-102-4-559_3
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Published: Ann Intern Med. 1985;102(4):559-560.
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