Publications by authors named "Margaret Lowenstein"

Importance: The alpha-2 agonist xylazine is increasingly detected as an adulterant in illicitly manufactured fentanyl. There is concern that xylazine may be responsible for an emerging pattern of necrotizing wounds among people who use drugs, but the clinical features of wounds associated with xylazine remain poorly characterized.

Objective: To systematically characterize the location, wound bed surface, and chronicity of wounds among persons with confirmed xylazine exposure.

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Article Synopsis
  • Buprenorphine is a safe and effective treatment for opioid use disorder (OUD), but opioid withdrawal during the start of treatment can lead to patients dropping out of care.
  • Recent shifts in the drug supply, particularly the rise of fentanyl, have heightened concerns about withdrawal symptoms being triggered by buprenorphine, yet some studies report low incidence rates of such incidents.
  • This study aimed to evaluate the occurrence of buprenorphine-precipitated withdrawal (PW) in patients and examine various factors that may influence its likelihood, using data from patients at three hospitals in Philadelphia treated between 2020 and 2021.
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Introduction: Rates of fatal overdose continue to rise in the United States, and most people with opioid use disorder (OUD) are not engaged in evidence-based treatment with medications. In Philadelphia, a city with one of the highest fatal overdose rates in the country, many residents face significant care access barriers. The COVID-19 pandemic - which destabilized the street drug supply and forced many clinics to limit services - worsened this crisis, but also led to regulatory changes that allowed for buprenorphine induction and maintenance visits via telehealth in the U.

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Article Synopsis
  • The study focuses on a Philadelphia-based mobile program that helps marginalized individuals access low-threshold substance use treatment, specifically buprenorphine for opioid dependence.
  • Researchers analyzed data from 237 patients over a year and found that most participants were middle-aged men, with significant numbers identifying as Black or White, and many were unstably housed.
  • The results indicated that while engagement in primary care and mental health treatment was low, a majority of participants attended multiple follow-up visits, and 51% linked to outside care, showcasing the program's potential to foster connections to ongoing treatment.
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Used as a veterinary sedative and not approved for human use, xylazine has been increasingly linked with opioid overdose deaths in the United States. A growing number of people have been exposed to xylazine in the illicit opioid supply (especially fentanyl) or in other drugs, particularly in some areas of the Northeast. Xylazine is an α-2 adrenergic agonist that decreases sympathetic nervous system activity.

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Objectives: Buprenorphine is not reliably stocked in many pharmacies, and pharmacy-level barriers may deter patients from opioid use disorder care. We surveyed all outpatient pharmacies in Philadelphia to describe variation in buprenorphine access and developed a map application to aid in identifying pharmacies that stock the medication.

Methods: Using a dataset from the Bureau of Professional and Occupational Affairs, we conducted a telephone survey of operating outpatient pharmacies (N = 422) about their buprenorphine stocking and dispensing practices.

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Background: The harms of opioid use disorder (OUD) and HIV infection disproportionately impact marginalized populations, especially people experiencing homelessness and people who inject drugs (PWID). Mobile OUD service delivery models are emerging to increase access and reduce barriers to OUD care. While there is growing interest in these models, there is limited research about the services they provide, how they operate, and what barriers they face.

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Background: Lung cancer screening (LCS) is recommended for individuals at high risk due to age and smoking history after a shared decision-making conversation. However, little is known about best strategies for incorporating shared decision-making, especially in a busy primary care setting.

Objective: To develop a novel tool, Lung Cancer Assessment of Risk and Education (LungCARE) to guide LCS decisions among eligible primary care patients.

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Background And Aims: Fentanyl is involved in most US drug overdose deaths and its use can complicate opioid withdrawal management. Clinical applications of quantitative urine fentanyl testing have not been demonstrated previously. The aim of this study was to determine whether urine fentanyl concentration is associated with severity of opioid withdrawal.

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Article Synopsis
  • The study investigates patient opinions on harm reduction strategies in hospital settings for those with opioid use disorder (OUD), revealing limited existing literature on the topic.
  • Through interviews with 21 hospitalized patients in Philadelphia, three key themes emerged: personal and societal acceptability of harm reduction practices and the need for better conversations around drug use with healthcare teams.
  • The findings suggest that while patients are generally open to harm reduction strategies, implementation must consider individual sensitivities and perceptions to ensure effectiveness and compliance.
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Study Objective: Emergency department (ED)-initiated buprenorphine improves outcomes in patients with opioid use disorder; however, adoption varies widely. To reduce variability, we implemented a nurse-driven triage screening question in the electronic health record to identify patients with opioid use disorder, followed by targeted electronic health record prompts to measure withdrawal and guide next steps in management, including initiation of treatment. Our objective was to assess the impact of screening implementation in 3 urban, academic EDs.

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Introduction: Opioid use disorder (OUD) and psychiatric conditions commonly co-occur yet are infrequently treated with evidence-based therapeutic approaches, resulting in poor outcomes. These conditions, separately, present challenges to treatment initiation, retention, and success. These challenges are compounded when individuals have OUD and psychiatric conditions.

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Purpose: Low-barrier treatment is an emerging strategy for opioid use disorder (OUD) care that prioritizes access to evidence-based medication while minimizing requirements that may limit treatment access in more traditional delivery models, particularly for marginalized patients. Our objective was to explore patient perspectives about low-barrier approaches, with a focus on understanding barriers to and facilitators of engagement from the patient point of view.

Methods: We conducted semi-structured interviews with patients accessing buprenorphine treatment from a multi-site, low-barrier mobile treatment program in Philadelphia, PA from July-December 2021.

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Background: Patients with opioid use disorder (OUD) frequently leave the hospital as patient directed discharges (PDDs) because of untreated withdrawal and pain. Short-acting opioids can complement methadone, buprenorphine, and non-opioid adjuvants for withdrawal and pain, however little evidence exists for this approach. We described the safety and preliminary outcomes of short-acting opioid agonist treatment (sOAT) for hospitalized patients with OUD at an academic hospital in Philadelphia, PA.

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Background: There is strong evidence for emergency department (ED)-initiated treatment of opioid use disorder (OUD). However, implementation is variable, and ED management of OUD may differ by clinical presentation. Our aim was to use mixed methods to explore variation in ED-based OUD care by patient clinical presentation and understand barriers and facilitators to ED implementation of OUD treatment across scenarios.

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Objectives: Buprenorphine is a highly effective medication for the treatment of opioid use disorder, but it can cause precipitated withdrawal (PW) from opioids. Incidence, risk factors, and best approaches to management of PW are not well understood. Our objective was to describe adverse outcomes after buprenorphine administration among emergency department (ED) patients and assess whether they met the criteria for PW.

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Background: Emergency departments (EDs) are important venues for the distribution of naloxone to patients at high risk of opioid overdose, but less is known about patient perceptions on naloxone or best practices for patient education and communication. Our aim was to conduct an in-depth exploration of knowledge and attitudes toward ED naloxone distribution among patients who received a naloxone prescription.

Methods: We conducted semi-structured telephone interviews with 25 adult participants seen and discharged from three urban, academic EDs in Philadelphia, PA, with a naloxone prescription between November 2020 and February 2021.

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Purpose: Our aim was to explore perspectives of patients who received naloxone in the emergency department (ED) about (1) naloxone carrying and use following an ED visit and (2) motivation for performing these behaviors.

Design: Semi-structured interviews of patients prescribed naloxone at ED discharge.

Settings: Three urban academic EDs in Philadelphia, PA.

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Purpose: To describe barriers to lung cancer screening (LCS) among family medicine and general internal medicine primary care physicians (PCPs) and assess the association of barriers with discussion and referral for screening.

Design: Cross-sectional survey.

Subjects And Settings: Random sample of primary care physicians (PCPs) in California.

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Importance: A central tenet of harm reduction and prevention of opioid overdose deaths is the distribution and use of naloxone. Patient-centered methods that investigate naloxone acquisition and carrying can guide opioid overdose education and naloxone distribution efforts.

Objective: To assess patients' self-reported naloxone acquisition and carrying after an emergency department (ED) encounter using automated text messaging.

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