EDucated: The emergency medicine pharmacotherapy literature of 2023.

The purpose of this article is to summarize pharmacotherapy related emergency medicine (EM) literature indexed in 2023. Articles were selected utilizing a modified Delphi approach. The table of contents from pre-determined journals were reviewed and independently evaluated via the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) system by paired authors. Pharmacotherapy-related publications deemed to be GRADE 1A and 1B were reviewed by the collective group for inclusion in the review. In all, this article summarizes and provides commentary on the potential clinical impact of 13 articles, 6 guidelines, and 5 meta-analyses covering topics including guideline releases and updates on rapid sequence intubation in the critically ill, managing cardiac arrest or life-threatening toxicity due to poisoning, and management of major bleeding following trauma. Also discussed are ongoing controversies surrounding fluid resuscitation, time and treatment modalities for ischemic stroke, steroid use in community-acquired pneumonia, targeted blood product administration, and much more.

Geriatric Emergency Medication Safety Recommendations (GEMS-Rx): Modified Delphi Development of a High-Risk Prescription List for Older Emergency Department Patients.

STUDY OBJECTIVE: Half of emergency department (ED) patients aged 65 years and older are discharged with new prescriptions. Potentially inappropriate prescriptions contribute to adverse drug events. Our objective was to develop an evidence- and consensus-based list of high-risk prescriptions to avoid among older ED patients. METHODS: We performed a modified, 3-round Delphi process that included 10 ED physician experts in geriatrics or quality measurement and 1 pharmacist. Consensus members reviewed all 35 medication categories from the 2019 American Geriatrics Society Beers Criteria and ranked each on a 5-point Likert scale (5=highest) for overall priority for avoidance (Round 1), risk of short-term adverse events and avoidability (Round 2), and reasonable medical indications for high-risk medication use (Round 3). RESULTS: For each round, questionnaire response rates were 91%, 82%, and 64%, respectively. After Round 1, benzodiazepines (mean, 4.60 [SD, 0.70]), skeletal muscle relaxants (4.60 [0.70]), barbiturates (4.30 [1.06]), first-generation antipsychotics (4.20 [0.63]) and first-generation antihistamines (3.70 [1.49]) were prioritized for avoidance. In Rounds 2 and 3, hypnotic "Z" drugs (4.29 [1.11]), metoclopramide (3.89 [0.93]), and sulfonylureas (4.14 [1.07]) were prioritized for avoidability, despite lower concern for short-term adverse events. All 8 medication classes were included in the final list. Reasonable indications for prescribing high-risk medications included seizure disorders, benzodiazepine/ethanol withdrawal, end of life, severe generalized anxiety, allergic reactions, gastroparesis, and prescription refill. CONCLUSION: We present the first expert consensus-based list of high-risk prescriptions for older ED patients (GEMS-Rx) to improve safety among older ED patients.

Evaluating Clinical Sequelae of the Carbapenem-Valproate Interaction: A Retrospective Analysis.

Background: Previous studies identified a rapid decrease in valproate serum concentrations when coadministered with a carbapenem; however, the specific consequences and subsequent therapy adjustments are not well described. We aimed to investigate the clinical and therapeutic implications of the carbapenem-valproate drug-drug interaction. Methods: This retrospective analysis included data from 2 large academic medical centers during January 2017 to June 2022. The primary outcome was incidence of seizures or behavioral events stratified by valproate indication. All adult patient encounters with concomitant administration of any carbapenem antimicrobial and valproate were included. Patients without prolonged exposure to valproate prior to hospitalization, without valproate levels pre- and post-carbapenem administration, with an admitting diagnosis of seizure, with exposure to other agents that decrease valproate concentrations, or who had a seizure during the hospitalization prior to carbapenem exposure were excluded. Results: Two hundred fifty-eight episodes of concomitant use among 78 unique adult patients were included. Valproate was used for seizure control in 41 patients (52.6%) and for mood-related disorders in 37 (47.4%). In those prescribed valproate for its antiepileptic properties, seizures occurred following carbapenem administration in 46.3% of encounters. In those taking valproate for mood-related disorders, 50.8% met the primary endpoint of behavioral disturbance. Conclusions: Our study demonstrates significant clinical implications of the carbapenem-valproate interaction. Clinicians should be aware of this interaction and consider alternative antimicrobial and/or antiepileptic agents whenever possible. Adding or increasing doses of antiepileptic agents and/or consultation with a neurologist prior to concomitant use should be considered when this combination cannot be avoided.

Evaluation of Medication Exposure on Exacerbation of Disease in Patients With Myasthenia Gravis.

Background and Purpose: In patients with myasthenia gravis (MG), worsening of symptoms poses a risk of respiratory failure which can be precipitated by medication use. Although purported, the risks associated with administration of certain medications are not fully elucidated. Thus, clinical decision support involving a best practice alert was executed to caution providers of drug-disease interactions when ordering a potentially harmful medication. We performed an analysis of the alert overrides with subsequent medication exposure to determine the incidence of MG exacerbations. Methods: This retrospective chart-review evaluated adult patients with MG at 2 large academic medical centers via electronic health records between November-2019 and November-2021 who received a medication following override of the clinical decision support tool. The primary outcome was proportion of patient encounters complicated by myasthenic exacerbations after potentially harmful medication administration. Secondary outcomes included changes in motor strength, length of stay, discharge disposition, unplanned level-of-care escalations, and changes to immunosuppressant therapy following medication administration. Results: A total of 70 orders were assessed in 38 patients across 55 encounters. Medications administered during these encounters included macrolides, fluoroquinolones, ß-blockers, calcium channel blockers, and magnesium sulfate. Exacerbation of disease occurred in 7 patient encounters (12.7%) and occurred after intravenous magnesium or intravenous labetalol. In 5/7 events, at least 1 other risk factor associated with a myasthenic exacerbation was present. Conclusions: Of the medications reported to potentially worsen MG, intravenous labetalol and intravenous magnesium were the 2 agents associated with myasthenic exacerbations with a higher incidence in patients harboring additional risk factors.

Adverse Drug Event Prevention and Detection in Older Emergency Department Patients.

Older adults are given therapies to enhance the quality and longevity of life, but with the benefits of medication therapy also comes the potential for adverse drug events (ADEs). Avoiding ADEs has become a national health priority with substantial impact on health outcomes and health care costs. The presence of multimorbidity, changes in physiologic function, and polypharmacy make older adults more vulnerable to medication-related ADEs. Use of interactive support tools in the form of geriatric-friendly medication order sets and geriatric consultations along with pharmacist-led medication review and optimization are imperative to decrease the occurrence of ADEs and unnecessary prescribing cascades.

Safety and Tolerability of 23.4% Hypertonic Saline Administered Over 2 to 5 Minutes for the Treatment of Cerebral Herniation and Intracranial Pressure Elevation.

BACKGROUND: Hyperosmolar therapy is the cornerstone of medical management of sustained elevated intracranial pressure from cerebral edema. Acute intracranial hypertension and herniation is a medical emergency that requires rapid treatment and stabilization to prevent secondary brain injury or death. Intravenous hypertonic sodium chloride (NaCl) 23.4% is an effective treatment modality commonly used in this setting. Because of its high osmolarity, use has historically been limited primarily to central venous line administration as an intermittent infusion due to concerns about thrombophlebitis, injection site pain, and tissue necrosis or injury with extravasation. The objective of this analysis was to prospectively evaluate the safety of administration of 23.4% NaCl as a rapid intravenous push over 2-5 min. METHODS: A prospective analysis of patients admitted between April 2021 and December 2021 who received 23.4% NaCl intravenous push over 2-5 min in a central or peripheral line was performed. Safety end points included incidence of new onset hypotension [defined as systolic blood pressure (SBP) < 90 mm Hg or SBP decrease of at least 20 mm Hg], bradycardia (defined as heart rate < 50 beats per minute), and infusion site reactions documented within 1 h of administration. For secondary safety outcomes, highest and lowest SBP and lowest heart rates documented within 1 h before 23.4% NaCl administration were compared with values collected within 1 h post administration and evaluated by mixed-design analysis of variance test with adjustment for peripheral versus central line administration. RESULTS: We identified 32 patients who received 79 administrations of 23.4% NaCl through a central line or peripheral line during the study period. An SBP decrease of at least 20 mm Hg was observed in 13% of patients, an SBP < 90 mm Hg occurred in 16% of patients, and bradycardia occurred in 3% of patients who received 23.4% NaCl. Injection site pain was reported by one patient without documented thrombophlebitis, cellulitis, or tissue damage. Pain was not reported during two subsequent administrations in the same patient. There was no documented occurrence of soft tissue injury or necrosis in any patient. Compared with baseline vital signs before 23.4% NaCl administration, no difference in vital signs post administration was observed. CONCLUSIONS: Central and peripheral administration of 23.4% NaCl over 2-5 min was well tolerated, and incidence of hypotension, bradycardia, or infusion site-related adverse events was rare.

Cardiovascular Pharmacology.

Pharmacologic therapy is an integral component in the management of most cardiovascular emergencies. This article reviews the pharmacotherapy involved in the treatment of acute coronary syndromes, acute heart failure, and various arrhythmias. The focus will be to provide practical pearls that can be applied at the bedside in the Emergency Department.

High risk and low prevalence diseases: Acute chest syndrome in sickle cell disease.

INTRODUCTION: Acute chest syndrome (ACS) in sickle cell disease (SCD) is a serious condition that carries with it a high rate of morbidity and mortality. OBJECTIVE: This review highlights the pearls and pitfalls of ACS in SCD, including diagnosis and management in the emergency department (ED) based on current evidence. DISCUSSION: ACS is defined by respiratory symptoms and/or fever and a new radiodensity on chest imaging in a patient with SCD. There are a variety of inciting causes, including infectious and non-infectious etiologies. Although ACS is more common in those with homozygous SCD, clinicians should consider ACS in all SCD patients, as ACS is a leading cause of death in SCD. Patients typically present with or develop respiratory symptoms including fever, cough, chest pain, and shortness of breath, which can progress to respiratory failure requiring mechanical ventilation in 20% of adult patients. However, the initial presentation can vary. While the first line imaging modality is classically chest radiograph, lung ultrasound has demonstrated promise. Further imaging to include computed tomography may be necessary. Management focuses on analgesia, oxygen supplementation, incentive spirometry, bronchodilators, rehydration, antibiotics, consideration for transfusion, and specialist consultation. Empiric antibiotics that cover atypical pathogens are necessary along with measures to increase oxygen-carrying capacity in those with hypoxemia such as simple transfusion or exchange transfusion. CONCLUSIONS: An understanding of ACS can assist emergency clinicians in diagnosing and managing this potentially deadly disease.

Effects of a pharmacy-driven medication history program on patient outcomes.

PURPOSE: Obtaining an accurate medication history is a vital component of medication reconciliation upon admission to the hospital. Despite the importance of this task, medication histories are often inaccurate and/or incomplete. We evaluated the association of a pharmacy-driven medication history initiative on clinical outcomes of patients admitted to the general medicine service of an academic medical center. METHODS: Comparing patients who received a pharmacy-driven medication history to those who did not, a retrospective stabilized inverse probability treatment weighting propensity score analysis was used to estimate the average treatment effect of the intervention on general medical patients. Fifty-two patient baseline characteristics including demographic, operational, and clinical variables were controlled in the propensity score model. Hospital length of stay, 7-day and 30-day unplanned readmissions, and in-hospital mortality were evaluated. RESULTS: Among 11,576 eligible general medical patients, 2,234 (19.30%) received a pharmacy-driven medication history and 9,342 (80.70%) patients did not. The estimated average treatment effect of receiving a pharmacy-driven medication history was a shorter length of stay (mean, 5.88 days vs 6.53 days; P = 0.0002) and a lower in-hospital mortality rate (2.34% vs 3.72%, P = 0.001), after adjustment for differences in patient baseline characteristics. No significant difference was found for 7-day or 30-day all-cause readmission rates. CONCLUSION: Pharmacy-driven medication histories reduced length of stay and in-hospital mortality in patients admitted to the general medical service at an academic medical center but did not change 7-day and 30-day all-cause readmission rates. Further research via a large, multisite randomized controlled trial is needed to confirm our findings.

Continuation of outpatient buprenorphine therapy after dispensing Buprenorphine-Naloxone from the emergency department.

BACKGROUND: Patients with opioid use disorder (OUD) are frequently seen in the ED for opioid-related reasons, which creates an opportunity for ED providers to discuss medications for OUD with their patients. Buprenorphine is a partial mu-opioid agonist that is FDA approved to treat OUD and may be initiated in the ED. Traditionally, buprenorphine therapy was initiated under healthcare provider observation; however, other strategies such as at-home induction have also emerged. METHODS: This was a retrospective descriptive analysis of patients aged 18 years or older who received a take-home supply of buprenorphine-naloxone from an urban, academic ED between March 2018 and March 2020. The primary outcome was the proportion of patients who filled a prescription for buprenorphine at three months after index ED visit. The proportion of patients that filled a prescription for buprenorphine at six months was also evaluated. The primary safety endpoint was the proportion of patients with return ED visit within six months related to opioid overdose. RESULTS: There were 242 patient records reviewed with 155 patients included in final analysis. Seventy (45.2%) patients filled buprenorphine prescriptions at three months, with 64 (41.3%) who filled buprenorphine prescriptions at six months. Seventeen (11%) patients had a return ED visit related to opioid overdose within six months. CONCLUSION: Dispensing buprenorphine take-home kits from the ED resulted in continuation of outpatient buprenorphine in almost 50% of patients. Further studies are warranted to define the role of ED-dispensed buprenorphine.

Use of antipsychotic and sedative medications in older patients in the emergency department.

BACKGROUND: Antipsychotics and sedatives are used to treat agitation in the emergency department (ED) but carry significant risk in older adults. Our objective was to determine factors associated with their administration to older ED patients. METHODS: This was an observational study using data from the 2014-2017 National Hospital Ambulatory Medical Care Survey. We identified ED visits for patients aged ≥65 years and determined whether an antipsychotic or sedative was administered. Visits related to substance use/withdrawal, other psychiatric complaints, and intubation were excluded. We performed multivariable logistic regression to identify risk factors for antipsychotic or sedative administration. RESULTS: Of the 78.7 million ED visits that met inclusion criteria, 3.5% involved at least one dose of antipsychotic or sedative medication; 13% involved an antipsychotic and 92% a sedative. Factors associated with antipsychotic administration included nursing home residence (adjusted odds ratio [aOR]: 2.67; 95% CI: 1.05-6.80), dementia (aOR: 5.62; 95% CI: 2.44-12.94), and delirium (aOR: 7.33; 95% CI: 2.21-24.32). Sedative administration was positively associated with CT or MR imaging (aOR: 1.86; 95% CI: 1.42-2.43), urbanicity of ED (aOR: 1.46; 95% CI: 1.02-2.08), and female gender (aOR: 1.47; 95% CI: 1.08-1.99) and negatively associated with older age (age: 75-84; aOR: 0.67; 95% CI: 0.49-0.91; age: 85+; aOR: 0.63; 95% CI: 0.45-0.88; reference age: 65-74 years). Antipsychotic and sedative administration were associated with prolonged ED lengths of stay and hospital admission. CONCLUSION: We identified patient- and facility-level factors associated with sedative and antipsychotic administration in older ED patients. Antipsychotic and sedative administration were associated with prolonged ED lengths of stay and hospital admission.

Heart rate outcomes with concomitant parenteral calcium channel blockers and beta blockers in rapid atrial fibrillation or flutter.

BACKGROUND: Patients who present with atrial fibrillation (AF) or flutter with rapid ventricular response (RVR) and hemodynamic stability may be managed with either an intravenous (IV) nondihydropyridine calcium channel blocker (CCB) or a beta-blocker (BB). Patients without improved heart rates may need to switch to, or add, a second AV nodal blocker. OBJECTIVE: To evaluate the incidence of rate control achievement and bradycardia in patients in AF or atrial flutter with RVR who receive both an intravenous CCB and a BB. METHODS: A retrospective chart review of patients who received concomitant intravenous CCB or BB for the treatment of rapid AF or atrial flutter from April 2016 through July 2018 in the emergency department. Patients were excluded if the second agent was ordered but not administered, or if they received IV amiodarone or digoxin. RESULTS: A total of 136 patients were included in the analysis, and of those, 46% (n = 62) of patients achieved a heart rate <110 bpm without bradycardia, and 3.7% (n = 5) developed bradycardia. Age, initial heart rate, time between CCB and BB administration, addition of an oral CCB or BB administration, or administration of IV magnesium did not impact target heart rate achievement. CONCLUSION: Adding a second nodal blocker in patients who did not achieve rate control with the first agent resulted in heart rate control 46% of the time. The development of symptomatic bradycardia was uncommon.

Implementation and Impact of Pharmacist-Initiated Home Medication Ordering in an Emergency Department Observation Unit.

PURPOSE: To design and evaluate the accuracy and efficiency of a medication reconciliation workflow incorporating pharmacist home medication ordering. METHODS: Designed and implemented an admission medication reconciliation workflow that expanded the pharmacists' role to include an initial ordering of home medications. Performed a prospective, pre-post cohort analysis comparing preimplementation accuracy and efficiency data from inpatient medicine and cardiology patients to postimplementation accuracy and efficiency data from our emergency department observation unit. Accuracy for the preimplementation group was defined by the number of unintentional discrepancies identified by pharmacists between the prescriber admission orders and the reconciled home medication lists. Accuracy for the postimplementation group was defined by the prescriber acceptance of pharmacist-ordered home medications. Efficiency was measured by pharmacist time to complete the admission medication reconciliation process. RESULTS: Prescribers accepted 98% of home medication orders placed by pharmacists, which correlated with a significant decrease in the occurrence of home medication orders containing a medication-related problem or discrepancy (46.4% vs 1.3%, P < .0001). The mean pharmacist time spent completing medication reconciliation per admission decreased from 64 to 23 minutes (P < .0001). CONCLUSION: Implementation of an admission process that incorporates pharmacist ordering of home medications increased prescribing accuracy and efficiency.

The agitated older adult in the emergency department: a narrative review of common causes and management strategies.

Agitation and aggression are common in older emergency department (ED) patients, can impede the expedient diagnosis of potentially life-threatening conditions, and can adversely impact ED functioning and efficiency. Agitation and aggression in older adults may be due to multiple causes, but chief among them are primary psychiatric disorders, substance use, hyperactive delirium, and symptoms of dementia. Understanding the etiology of agitation in an older adult is critical to proper management. Effective non-pharmacologic modalities are available for the management of mild to moderate agitation and aggression in patients with dementia. Pharmacologic management is indicated for agitation related to a psychiatric condition, severe agitation where a patient is at risk to harm self or others, and to facilitate time-sensitive diagnostic imaging, procedures, and treatment. Emergency physicians have several pharmacologic agents at their disposal, including opioid and non-opioid analgesics, antipsychotics, benzodiazepines, ketamine, and combination agents. Emergency physicians should be familiar with geriatric-specific dosing, contraindications, and common adverse effects of these agents. This review article discusses the common causes and non-pharmacologic and pharmacologic management of agitation in older adults, with a specific focus on dementia, delirium, and pain.

Assessment and Optimization of the Empiric Treatment of Urinary Tract Infections in an Academic Emergency Department Observation Unit.

BACKGROUND: Poor adherence to evidence-based guidelines and overuse of broad-spectrum antibiotics has been noted in the emergency department (ED). There is limited evidence on guideline-congruent empiric therapy for urinary tract infections (UTIs) and uropathogen susceptibilities in the ED observation unit (EDOU). OBJECTIVE: The primary objective was to evaluate the prescribing patterns for the empiric treatment of UTI in the EDOU. Secondary objectives were to analyze uropathogen susceptibilities in the EDOU and implement an algorithm for the empiric treatment of UTI. METHODS: This study retrospectively reviewed adult patients who received empiric UTI treatment in the EDOU from January 1, 2018 to April 1, 2018. Eligible patients were categorized as having either uncomplicated or complicated cystitis, or pyelonephritis based on their clinical diagnosis. Antimicrobial therapy was evaluated in accordance with national practice guidelines, institutional guidelines, and local antimicrobial susceptibility patterns. RESULTS: Patients with uncomplicated or complicated cystitis (n = 115) were provided guideline-congruent empiric treatment in 87% of cases. Patients with pyelonephritis (n = 35) were provided guideline-congruent empiric treatment in 57% of cases. Susceptibility patterns of uropathogens isolated from this patient sample differed slightly from the institutional antibiogram, notably depicting a lower Escherichia coli susceptibility rate. Fluoroquinolones were prescribed for a longer than recommended duration in 18 patients (60%). CONCLUSIONS: The majority of patients in this study were provided guideline-congruent empiric therapy. Nevertheless, there are opportunities to optimize empiric UTI treatment and improve antibiotic stewardship in the EDOU.

A comprehensive evaluation of apixaban in the treatment of venous thromboembolism.

Introduction: The emergence of the direct oral anticoagulants (DOACs) offers patients more convenient and accessible alternatives to warfarin or parenteral agents for the treatment of venous thromboembolism (VTE). Apixaban (Eliquis®) is an oral, direct factor Xa inhibitor that is approved for the acute treatment of deep-vein thrombosis (DVT) and pulmonary embolism (PE) as well as for the reduction in the risk of recurrent DVT and PE following initial therapy.Areas covered: This article reviews results from preclinical and healthy volunteer studies, large phase III trials evaluating the safety and efficacy of apixaban, as well as key studies that led to apixaban's current licensing. This review also will provide an overview of special populations where future areas of research are needed.Expert commentary: Apixaban offers several advantages over historical therapy for the treatment and secondary prevention of VTE. However, there are some populations in which the use of apixaban has not been extensively studied such as patients >75 years old, or those with cancer, low or high body weight, or poor renal function. Likewise, there is a dearth of data on pediatric patients and patients with a history of heparin-induced thrombocytopenia or identified forms of thrombophilia. Additional comparator studies on anticoagulation reversal involving andexanet alfa are also necessary to further assess its hemostatic efficacy and prothrombotic risk.

Medications for management of opioid use disorder.

PURPOSE: The use of buprenorphine, methadone, and long-acting naltrexone for treatment of opioid use disorder (OUD) is discussed, including a review of current literature detailing treatment approaches and action steps to optimize treatment in acute care and office-based settings. SUMMARY: The U.S. epidemic of opioid-related deaths has been driven by misuse of prescription opioids and, increasingly, illicit drugs such as heroin, fentanyl, and fentanyl analogs, necessitating a refocusing of treatment efforts on expanding access to life-saving, evidence-based OUD pharmacotherapy. Inpatient treatment of opioid withdrawal includes acute symptom control through a combination of nonopioid medications and long-term pharmacotherapy to lessen opioid craving and facilitate stabilization and recovery. Methadone and buprenorphine reduce opioid craving, increase treatment retention, reduce illicit opioid use, and increase overall survival. Buprenorphine has logistical advantages over methadone, such as greater flexibility of treatment setting and less risk of adverse effects. Studies have shown the efficacy of long-acting injectable naltrexone to be comparable to that of buprenorphine if patients are detoxified prior to initiation of therapy; however, patients with active OUD are often not able to complete the week-long period of opioid abstinence needed prior to initiation of naltrexone injections. Although buprenorphine is preferred by many patients and can be prescribed in office-based settings, there remains a paucity of physicians certified to prescribe it. CONCLUSION: Buprenorphine has become the medication of choice for many patients with OUD, but its use is limited by the low number of physicians certified to prescribe the agent. Other agents studied for treatment of OUD include methadone and naltrexone.

Ketamine procedural sedation in the emergency department of an urban tertiary hospital in Dar es Salaam, Tanzania.

STUDY OBJECTIVE: We describe ketamine procedural sedations and associated adverse events in low-acuity and high-acuity patients in a resource-limited ED. METHODS: This was a prospective observational study of ketamine procedural sedations at the Emergency Medical Department at the Muhimbili National Hospital in Dar es Salaam, Tanzania. We observed consecutive procedural sedations and recorded patient demographics, medications, vital signs, pulse oximetry, capnography and a priori defined adverse events (using standard definitions in emergency medicine sedation guidelines). All treatment decisions were at the discretion of the treating providers who were blinded to study measurements to simulate usual care. Data collection was unblinded if predefined safety parameters were met. For all significant adverse and unblinding events, ketamine causality was determined via review protocol. Additionally, providers and patients were assessed for sedation satisfaction. RESULTS: We observed 54 children (median 3 years, range 11 days-15 years) and 45 adults (median 33 years, range 18-79 years). The most common indications for ketamine were burn management in children (55.6%) and orthopaedic procedures in adults (68.9%). Minor adverse events included nausea/vomiting (12%), recovery excitation (11%) and one case of transient hypertension. There were nine (9%) patients who had decreased saturation readings (SpO2 ≤92%). There were three deaths, all in severely injured patients. After review protocol, none of the desaturations or patient deaths were thought to be caused by ketamine. No patient experienced ketamine-related laryngospasm, apnoea or permanent complications. Overall, ketamine was well tolerated and resulted in high patient and provider satisfaction. CONCLUSION: In this series of ketamine sedations in an urban, resource-limited ED, there were no serious adverse events attributable to ketamine.