Brian L Erstad

PMID: 2690471;Abstract:

Severe cardiovascular adverse reactions including death have been associated with high-dose intravenous corticosteroid therapy. Some of the patients appeared to have acute hypersensitivity reactions to the corticosteroid, with rashes and bronchospasm; other problems included arrhythmias and myocardial infarctions. Most of the patients had underlying renal disease and/or were undergoing renal transplantation. All of the patients having the cardiovascular reactions associated with the corticosteroid received individual doses of at least 250 mg of methylprednisolone or its equivalent. The doses were usually administered over a 30-minute period or less. A cause-effect relationship between high-dose corticosteroid therapy and severe cardiovascular reactions has not been scientifically proved by a controlled trial, but caution is advised when high-dose corticosteroid therapy is administered.

PMID: 18029956;Abstract:

Purpose. The cost implications of and potential adverse events prevented by the interventions of a critical care pharmacist were studied. Methods. A decentralized clinical pharmacist assigned to a surgical intensive care unit (ICU) documented all interventions made from mid-October 2003 through February 2004 using a standardized written form. The data were retrospectively evaluated and the following information was extracted: amount of time spent performing various clinical activities, how drug-related problems were identified (e.g., order entry versus chart review), and a general description of the interventions. The interventions were independently reviewed by two other clinical pharmacists to determine whether an actual or potential adverse drug event (ADE) would have occurred without the intervention, the probability that an ADE would have occurred without the intervention, the type of intervention, and potential cost avoidance of the intervention. Once the evaluations were completed, the data obtained from order entry and verification activities were compared with the data obtained during other clinical functions. Results. A total of 129 interventions were documented over 4.5 months. The majority of interventions were identified during chart review (40%) and patient care rounds (39%).The potential cost avoidance of the documented interventions was $205,919-$280,421. Interventions identified during patient care rounds and chart review were most likely to achieve the greatest impact on cost avoidance. Conclusion. Among the interventions performed and documented by a clinical pharmacist in an ICU, patient care rounds and chart-review activities were associated with the greatest number of interventions and the greatest potential cost avoidance. Copyright © 2007, American Society of Health-System Pharmacists, Inc. All rights reserved.

PMID: 1521404;Abstract:

The treatment of two common adverse effects of dapsone (methemoglobinemia and hemolytic anemia) is discussed, and a case of acute dapsone intoxication is described. A pregnant 29-year-old woman was admitted to an emergency room three hours after ingesting 50 tablets of dapsone (100 mg each) and six alcoholic drinks. One hour after admission 50 g of activated charcoal was given p.o., and 65 mg of methylene blue was given i.v. The patient was found to have a methemoglobin concentration of 25.1%. Arterial blood gases while the patient was breathing 4 L/min of oxygen by nasal cannula were PO2, 136 mm Hg (72.1% saturation); PCO2, 28.9 mm Hg; bicarbonate content, 18.9 mmol/L; and pH, 7.42. Oxygen therapy was changed to 100% oxygen by face mask, 50 g of activated charcoal in sorbitol was administered p.o., and another 65 mg of methylene blue was given i.v. Two more 50-g doses of activated charcoal in sorbitol were given (18.5 and 22 hours after dapsone ingestion). Methylene blue 130 mg was given 14 hours after dapsone ingestion, and 65 mg was given 21, 36, and 55.5 hours after ingestion. Methemoglobin concentrations never rose above 20% after the sixth dose of methylene blue. On hospital days 2 and 3, laboratory values were consistent with a diagnosis of hemolytic anemia; the patient received two units of packed red blood cells. The hematocrit decreased over the next three days to 23.9%, and the patient received four units of packed red blood cells. On day 8 oxygen therapy was changed to oxygen 2 L/min by nasal cannula, and on day 10 the patient was breathing room air. Oral doses of activated charcoal have been used to treat acute dapsone poisoning. Methylene blue acts as a cofactor for the nicotinamide adenine dinucleotide phosphate system to convert methemoglobin to hemoglobin. Methylene blue, however, sometimes aggravates the adverse effects of dapsone, particularly in patients with glucose 6-phosphate dehydrogenase deficiency. Total methylene blue dosages exceeding 4 mg/kg are more likely to aggravate the methemoglobinemia and possibly cause or aggravate an acute hemolytic state. Most cases of dapsone-induced methemoglobinemia and hemolysis resolve when the offending drug is discontinued. When methylene blue is required for symptomatic patients with an elevated methemoglobin concentration (more than 30%), careful monitoring of drug dosage and clinical progress is indicated.