Wednesday 24 January 2018

Ibuprofen Overdose Requiring Vasopressor Support in a Pediatric Patient

                               http://www.mathewsopenaccess.com/EMedicine-vol-2-Iss-1.html


Here we present the case of a 14-year-old female who presented to our community emergency department after reportedly ingesting about 30 tablets of an unknown medication while at school about 2 hours prior to arrival. She denies suicidal ideation, gestures, plan or attempt (although she admitted a history of suicide attempts); stating she took it for relief of knee pain. The medication was her friend’s. She reported malaise, nausea, dry mouth, blurry vision, jitteriness, and dyspnea; denying any other systemic complaints, including vomiting of pill fragment, chest or abdominal pain, diarrhea, headaches, syncope, light-headedness, or diaphoresis. She had no medical or surgical history, and denied drug or food allergies. She took no medications on a daily basis, and all immunizations were up-to-date. The patient admitted to smoking marijuana once within the past month; no other illicit drug intake, as well as no alcohol or tobacco products.

Given her significant presentation, she was dispositioned as ESI level 1 (emergency severity index, on a scale from 1 to 5, with a lower number representing higher acuity). Initial vital signs were as follows: blood pressure 105/54 mmHg, pulse rate of 130 beats per minute and regular, respirations of 14 breath per minute, saturating 100% on ambient air, and axillary temperature of 98.8 Fahrenheit. On examination, she was somnolent but arousable to loud verbal as well as noxious stimuli; Glasgow Coma Scale 14. On physical examination, she appeared toxic and uncomfortable. Neurologic exam including speech and mentation were intact, aside from her eyes which were 3 mm bilaterally, not reactive to light and exhibited roving movement. Cardiopulmonary exam was insignificant aside from the tachycardia as noted. Skin was not diaphoretic, of normal colour and without piloerection. She weighed 52 kg (BMI: 19). A work-up was immediately undertaken focusing on suspected overdose, inflammatory and cardiac markers. Lactate was 3.7 mmol/L (reference range: <2.2). Arterial pH 7.34. Remaining bloodwork, including electrolytes, blood counts, liver/kidney/ pancreas functions, cardiac biomarkers, coagulation studies, osmolality, urinalysis, urine drug screen, alcohol, and salicylate levels were unremarkable. Her urine pregnancy was negative.

 A portable plain chest film was without an acute process. An electrocardiogram done upon initial presentation and repeated about 3 hours later both revealed sinus tachycardia in the 120-130 beats per minute, with normal axis and intervals (QRS 84 and 110 milliseconds, QTc 457 and 489 milliseconds, respectively), without an acute current of injury. Intravenous fluids in the form of normal saline were ordered as well as lorazepam for agitation. Naloxone was also attempted for somnolence without a response. Despite a weight-based dose for fluid resuscitation, her blood pressure was 84/57 mmHg; she remained tachycardic in the 120s, vital signs otherwise were stable. A central line was placed and Dopamine initiated. Anticholinergic overdose was briefly entertained, although her clinical presentation did not completely align with the familiar toxidrome. More information was soon available when the patient’s parents arrived: the mother strongly suspected she took Motrin from one of her friends, estimated to be about 18 grams (30 tablets, 600 mg each). It was also discovered she was taking oral contraceptives, valacyclovir, and was on a course of ciprofloxacin for cystitis. Pantoprazole was added intravenously.


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