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Gillian Kolla

Biographic Data

ID5408930
NAMEGillian Kolla
GIVEN NAMESGillian
FAMILY NAMEKolla
SIGNATUREKOLLA G
AFFILIATIONSUniversity of Toronto
ORCID0000-0002-5743-7153
VERIFIEDYes
TOTAL WORKS30
TOTAL CITATIONS23
AUTHOR COUNT30
EDITOR COUNT0
FIRST PUBLICATION YEAR2012
LATEST PUBLICATION YEAR2026
H-INDEX2
  • Reduced risk of overdose among clients of a safer opioid supply program in Southwestern Ontario: A pre-post observational cohort study

    Open Access•Gillian Kolla, Jerri-Lyn Lewis et al.•ARTICLE•International Journal of Drug…•2026

    Participants in a SOS program experienced significant reductions in non-fatal overdose during the 6 months following program initiation. SOS clients are a high-risk population with elevated overdose rates at baseline; these results support expanding safer supply programs as part of a comprehensive set of strategies to address the overdose crisis

  • The impact of the Covid-19 pandemic on access to harm reduction and treatment services among people who inject drugs in Toronto, Canada: A qualitative investigation

    Open Access•Gillian Kolla, Jeanette M Bowles et al.•ARTICLE•SSM - Qualitative Research in…•2025

    (230 words) The COVID-19 pandemic and related restrictions exacerbated Canada’s ongoing drug toxicity overdose crisis. Opioid agonist therapy (OAT), safer opioid supply (SOS), and supervised consumption sites (SCS) are interventions that aim to reduce risk of morbidity and mortality from drug toxicity and were affected by COVID-19. Between September and October 2020, we conducted qualitative interviews with 24 people who inject drugs receiving se…

  • Trends in varying modes of drug use in opioid toxicity deaths in Ontario from 2017 to 2021

    Open Access•Martha Macdonald, Clare Cheng et al.•ARTICLE•International Journal of Drug…•2025

  • Changing trends in safer opioid supply uptake, dose and hydromorphone volume in Ontario: A population-based cross-sectional study

    Open Access•Fujie Xu, Felix Xu et al.•ARTICLE•International Journal of Drug…•2025

    An accelerating number of safer opioid supply recipients over time, coupled with rising immediate-release hydromorphone doses likely reflects efforts to meet the needs of people who use drugs in the context of an increasingly potent unregulated opioid supply, particularly as this supply changed throughout the COVID-19 pandemic

  • Gendered Experiences of Ontological Insecurity Among Women Who Use Drugs and Experience Housing Insecurity: A Critical Narrative Analysis

    Open Access•Melissa Perri, Adrian Guta et al.•ARTICLE•Contemporary Drug Problems•2025•Cited by: 2•References: 33

    Introduction: Research has established that experiences of substance use and housing insecurity leads to violence, alienation, and health deterioration for women. However, no literature has assessed how the gendered nature of substance use and housing insecurity influence the ontological insecurity of women. This paper examines the relationship between ontological insecurity, substance use, and housing insecurity for women. We provide considerati…

  • Comprehensive substance use services within primary care settings: The Safer Opioid Supply program at London InterCommunity Health Centre

    Open Access•Kaitlin Fajber, Andrea Sereda et al.•ARTICLE•Canadian Journal of Public Health•2025•Cited by: 1•References: 22

    Positive health and social outcomes demonstrate the utility of embedding comprehensive substance use services within a primary health care model to address health and social complexity among people who use drugs amid the continuing toxic drug crisis. Responding to an increasingly volatile unregulated supply of drugs, having limited medication options, and providing comprehensive care without long-term funding remain ongoing challenges

  • Covid-19 isolation and recovery sites evaluation: Lessons learned for systems innovation

    Open Access•Melvin Firestone, Kimia Khoee et al.•ARTICLE•Canadian Journal of Public Health•2025•References: 13

  • Just have this come from their prescription pad: The medicalization of safer supply from the perspectives of health planners in BC, Canada

    Celeste Macevicius, Daniel Gudiño Pérez et al.•ARTICLE•Drugs Education Prevention and…•2024

    Context In March 2020, British Columbia introduced the Risk Mitigation Guidance (RMG) to enable the prescription of pharmaceutical substitutes for the unregulated drug market to decrease overdose deaths and COVID-19 infections. This study presents health planners’ perspectives on the RMG adoption within a medicalized system of care.Methods We conducted interviews with 28 health planners to obtain their views on implementation. We undertook a them…

  • “Everybody is impacted. Everybody's hurting”: Grief, loss and the emotional impacts of overdose on harm reduction workers

    Open Access•Gillian Kolla, Triti Khorasheh et al.•ARTICLE•International Journal of Drug…•2024

    Our study highlights opportunities for organizational practices that better support harm reduction workers, including formal emotional supports and community-based supportive care services. Improvement to the socio-economic-political determinants of work such as adequate compensation and access to full benefit packages are also needed in the harm reduction sector for all workers

  • Mapping a moral panic: News media narratives and medical expertise in public debates on safer supply, diversion, and youth drug use in Canada

    Open Access•Liam Michaud, Gillian Kolla et al.•ARTICLE•International Journal of Drug…•2024

    The ongoing overdose and drug toxicity crisis in North America has contributed momentum to the emergence of safer supply prescribing and programs in Canada as a means of providing an alternative to the highly volatile unregulated drug supply. The implementation and scale-up of safer supply have been met with a vocal reaction on the part of news media commentators, conservative politicians, recovery industry representatives, and some prominent add…

  • Prescribed safer opioid supply: A scoping review of the evidence

    Open Access•Shaleesa Ledlie, Ria Garg et al.•ARTICLE•International Journal of Drug…•2024

    BACKGROUND: Safer opioid supply programs provide prescription pharmaceutical opioids, often with supportive services, to people at high risk of experiencing harms related to substance use. However, questions regarding the effectiveness and safety of this practice remain. We conducted a scoping review of literature describing client outcomes from formal opioid supply programs providing prescriptions for pharmaceutical opioids, and the perceptions …

  • Safer Opioid Supply programs: Hydromorphone prescribing in Ontario as a harm reduction intervention to combat the drug poisoning crisis

    Open Access•Ruth A Schmidt, Rose A Schmidt et al.•ARTICLE•Canadian Journal of Public Health•2024•Cited by: 3•References: 27

    Our findings suggest that the combination of safer supply, wrap-around support, and harm reduction within primary care settings can lead to increased healthcare engagement, HIV/HCV prevention, testing, and treatment uptake, reducing the burden of infectious diseases and overdose risk. SSPs have the potential to meaningfully reduce overdose rates, address the ongoing overdose crisis, and if scaled up, influence population-level outcomes

  • ‘I don't chase drugs as much anymore, and I'm not dead’: Client reported outcomes associated with safer opioid supply programs in Ontario, Canada

    Open Access•Ruth A Schmidt, Nat Kaminski et al.•ARTICLE•Drug and Alcohol Review•2023

  • Challenges of implementing safer supply programs in Canada during the Covid-19 pandemic: A qualitative analysis

    Open Access•Mohammad Karamouzian, Bijan Rafat et al.•ARTICLE•International Journal of Drug…•2023

    Safer supply pilot programs in Canada face multiple inner and outer implementation challenges. Given the potential role of safer supply programs in addressing the drug toxicity crisis in Canada and the possibility of future scale-up, services should be well-supported during their implementation phases. Refining service provision within safer supply programs based on the feedback and experiences of clients and program administrators is warranted, …

  • Spotting as a risk mitigation method: A qualitative study comparing organization-based and informal methods

    Open Access•Melissa Perri, Adrian Guta et al.•ARTICLE•International Journal of Drug…•2023

  • Assessing the impact of the slow-release oral morphine drug shortages in Ontario, Canada: A population-based time series analysis

    Open Access•Shaleesa Ledlie, Mina Tadrous et al.•ARTICLE•International Journal of Drug…•2023

  • Requiring help injecting among people who inject drugs in Toronto, Canada: Characterising the need to address sociodemographic disparities and substance‐use specific patterns

    Open Access•Sanjana Mitra, Gillian Kolla et al.•ARTICLE•Drug and Alcohol Review•2022

  • Association of Illicit Fentanyl Use with Injection Risk Practices Among People who Inject Drugs

    Open Access•Kathleen S Kenny, Gillian Kolla et al.•ARTICLE•AIDS and Behavior•2022

  • Covid just kind of opened a can of whoop-ass”: The rapid growth of safer supply prescribing during the pandemic documented through an environmental scan of addiction and harm reduction services in Can…

    Open Access•Stephanie M N Glegg, Stephanie Glegg et al.•ARTICLE•International Journal of Drug…•2022

    Data confirmed the capacity for rapid scale-up of flexible, community-based safer supply prescribing during dual public health emergencies. Geographical, client demographic, and funding gaps highlight the need to target barriers to implementation, service delivery and sustainability

  • Characterizing safer supply prescribing of immediate release hydromorphone for individuals with opioid use disorder across Ontario, Canada

    Open Access•Samantha Young, Gillian Kolla et al.•ARTICLE•International Journal of Drug…•2022

  • Medicalization under prohibition: The tactics and limits of medicalization in the spaces where people use illicit drugs

    Gillian Kolla, Carol Strike•ARTICLE•Drugs Education Prevention and…•2021

    The ‘Satellite Sites’ are a harm reduction intervention in which people who use illicit drugs are employed by a community health centre to run satellite harm reduction programs within their homes. Satellite Sites straddle two worlds, at once sites of illicit and stigmatized activities, while also being sites of public health intervention. They offer a unique opportunity to examine the challenges of medicalizing a place that is still criminalized.…

  • Help me fix: The provision of injection assistance at an unsanctioned overdose prevention site in Toronto, Canada

    Open Access•Gillian Kolla, Kathleen S Kenny et al.•ARTICLE•International Journal of Drug…•2020

  • Critical studies of harm reduction: Overdose response in uncertain political times

    Open Access•Tara Marie Watson, Gillian Kolla et al.•ARTICLE•International Journal of Drug…•2020

  • It's too much, I'm getting really tired of it’: Overdose response and structural vulnerabilities among harm reduction workers in community settings

    Open Access•Gillian Kolla, Carol Strike•ARTICLE•International Journal of Drug…•2019

  • It's our safe sanctuary’: Experiences of using an unsanctioned overdose prevention site in Toronto, Ontario

    Open Access•Annie Foreman-Mackey, Ahmed M Bayoumi et al.•ARTICLE•International Journal of Drug…•2019

    The unsanctioned OPS in Toronto served an important role in defining new, community-led, flexible responses to opioid overdose-related deaths at a time of markedly increasing mortality. Providing harm reduction services in diverse settings and expanding services to include smoking and assisted injection may increase access for marginalized people who use drugs

Next
  • A New Realistic Evaluation Analysis Method: Linked Coding of Context, Mechanism, and Outcome Relationships

    Open Access•Suzanne F Jackson, Gillian Kolla•ARTICLE•American Journal of Evaluation•2012•Cited by: 17•References: 1

    In attempting to use a realistic evaluation approach to explore the role of Community Parents in early parenting programs in Toronto, a novel technique was developed to analyze the links between contexts (C), mechanisms (M) and outcomes (O) directly from experienced practitioner interviews. Rather than coding the interviews into themes in terms of context, intervention elements (mechanisms) and outcomes separately and which could be assembled int…

  • Safer Opioid Supply programs: Hydromorphone prescribing in Ontario as a harm reduction intervention to combat the drug poisoning crisis

    Open Access•Ruth A Schmidt, Rose A Schmidt et al.•ARTICLE•Canadian Journal of Public Health•2024•Cited by: 3•References: 27

    Our findings suggest that the combination of safer supply, wrap-around support, and harm reduction within primary care settings can lead to increased healthcare engagement, HIV/HCV prevention, testing, and treatment uptake, reducing the burden of infectious diseases and overdose risk. SSPs have the potential to meaningfully reduce overdose rates, address the ongoing overdose crisis, and if scaled up, influence population-level outcomes

  • Gendered Experiences of Ontological Insecurity Among Women Who Use Drugs and Experience Housing Insecurity: A Critical Narrative Analysis

    Open Access•Melissa Perri, Adrian Guta et al.•ARTICLE•Contemporary Drug Problems•2025•Cited by: 2•References: 33

    Introduction: Research has established that experiences of substance use and housing insecurity leads to violence, alienation, and health deterioration for women. However, no literature has assessed how the gendered nature of substance use and housing insecurity influence the ontological insecurity of women. This paper examines the relationship between ontological insecurity, substance use, and housing insecurity for women. We provide considerati…

  • Comprehensive substance use services within primary care settings: The Safer Opioid Supply program at London InterCommunity Health Centre

    Open Access•Kaitlin Fajber, Andrea Sereda et al.•ARTICLE•Canadian Journal of Public Health•2025•Cited by: 1•References: 22

    Positive health and social outcomes demonstrate the utility of embedding comprehensive substance use services within a primary health care model to address health and social complexity among people who use drugs amid the continuing toxic drug crisis. Responding to an increasingly volatile unregulated supply of drugs, having limited medication options, and providing comprehensive care without long-term funding remain ongoing challenges

  • A New Realistic Evaluation Analysis Method: Linked Coding of Context, Mechanism, and Outcome Relationships

    Open Access•Suzanne F Jackson, Gillian Kolla•ARTICLE•American Journal of Evaluation•2012•Cited by: 17•References: 1

    In attempting to use a realistic evaluation approach to explore the role of Community Parents in early parenting programs in Toronto, a novel technique was developed to analyze the links between contexts (C), mechanisms (M) and outcomes (O) directly from experienced practitioner interviews. Rather than coding the interviews into themes in terms of context, intervention elements (mechanisms) and outcomes separately and which could be assembled int…

  • Design considerations for supervised consumption facilities (SCFs): Preferences for facilities where people can inject and smoke drugs

    Open Access•Tara Marie Watson, Carol Strike et al.•ARTICLE•International Journal of Drug…•2013

  • Transition to Injection Drug Use: The Role of Initiators

    Open Access•Nooshin Khobzi Rotondi, Carol Strike et al.•ARTICLE•AIDS and Behavior•2014

  • Risk creating and risk reducing: Community perceptions of supervised consumption facilities for illicit drug use

    Gillian Kolla, Carol Strike et al.•ARTICLE•Health Risk & Society•2017

    Progressive public health authorities in high-income countries have advocated supervised consumption facilities, where people who use illicit drugs can consume them in a hygienic, supervised environment, as a way of reducing drug-related risks to both people who use drugs and communities. However, the planning of such facilities has often met with strong reactions from the local community. ‘Not in my backyard’ (NIMBY) type reactions are frequentl…

  • Preventing Injection Drug use Initiation: State of the Evidence and Opportunities for the Future

    Open Access•Dan Werb, Ricky N Bluthenthal et al.•ARTICLE•Journal of Urban Health•2018

  • It's too much, I'm getting really tired of it’: Overdose response and structural vulnerabilities among harm reduction workers in community settings

    Open Access•Gillian Kolla, Carol Strike•ARTICLE•International Journal of Drug…•2019

  • It's our safe sanctuary’: Experiences of using an unsanctioned overdose prevention site in Toronto, Ontario

    Open Access•Annie Foreman-Mackey, Ahmed M Bayoumi et al.•ARTICLE•International Journal of Drug…•2019

    The unsanctioned OPS in Toronto served an important role in defining new, community-led, flexible responses to opioid overdose-related deaths at a time of markedly increasing mortality. Providing harm reduction services in diverse settings and expanding services to include smoking and assisted injection may increase access for marginalized people who use drugs

  • Help me fix: The provision of injection assistance at an unsanctioned overdose prevention site in Toronto, Canada

    Open Access•Gillian Kolla, Kathleen S Kenny et al.•ARTICLE•International Journal of Drug…•2020

  • Critical studies of harm reduction: Overdose response in uncertain political times

    Open Access•Tara Marie Watson, Gillian Kolla et al.•ARTICLE•International Journal of Drug…•2020

  • Medicalization under prohibition: The tactics and limits of medicalization in the spaces where people use illicit drugs

    Gillian Kolla, Carol Strike•ARTICLE•Drugs Education Prevention and…•2021

    The ‘Satellite Sites’ are a harm reduction intervention in which people who use illicit drugs are employed by a community health centre to run satellite harm reduction programs within their homes. Satellite Sites straddle two worlds, at once sites of illicit and stigmatized activities, while also being sites of public health intervention. They offer a unique opportunity to examine the challenges of medicalizing a place that is still criminalized.…

  • Requiring help injecting among people who inject drugs in Toronto, Canada: Characterising the need to address sociodemographic disparities and substance‐use specific patterns

    Open Access•Sanjana Mitra, Gillian Kolla et al.•ARTICLE•Drug and Alcohol Review•2022

  • Association of Illicit Fentanyl Use with Injection Risk Practices Among People who Inject Drugs

    Open Access•Kathleen S Kenny, Gillian Kolla et al.•ARTICLE•AIDS and Behavior•2022

  • Covid just kind of opened a can of whoop-ass”: The rapid growth of safer supply prescribing during the pandemic documented through an environmental scan of addiction and harm reduction services in Can…

    Open Access•Stephanie M N Glegg, Stephanie Glegg et al.•ARTICLE•International Journal of Drug…•2022

    Data confirmed the capacity for rapid scale-up of flexible, community-based safer supply prescribing during dual public health emergencies. Geographical, client demographic, and funding gaps highlight the need to target barriers to implementation, service delivery and sustainability

  • Characterizing safer supply prescribing of immediate release hydromorphone for individuals with opioid use disorder across Ontario, Canada

    Open Access•Samantha Young, Gillian Kolla et al.•ARTICLE•International Journal of Drug…•2022

  • ‘I don't chase drugs as much anymore, and I'm not dead’: Client reported outcomes associated with safer opioid supply programs in Ontario, Canada

    Open Access•Ruth A Schmidt, Nat Kaminski et al.•ARTICLE•Drug and Alcohol Review•2023

  • Challenges of implementing safer supply programs in Canada during the Covid-19 pandemic: A qualitative analysis

    Open Access•Mohammad Karamouzian, Bijan Rafat et al.•ARTICLE•International Journal of Drug…•2023

    Safer supply pilot programs in Canada face multiple inner and outer implementation challenges. Given the potential role of safer supply programs in addressing the drug toxicity crisis in Canada and the possibility of future scale-up, services should be well-supported during their implementation phases. Refining service provision within safer supply programs based on the feedback and experiences of clients and program administrators is warranted, …

  • Spotting as a risk mitigation method: A qualitative study comparing organization-based and informal methods

    Open Access•Melissa Perri, Adrian Guta et al.•ARTICLE•International Journal of Drug…•2023

  • Assessing the impact of the slow-release oral morphine drug shortages in Ontario, Canada: A population-based time series analysis

    Open Access•Shaleesa Ledlie, Mina Tadrous et al.•ARTICLE•International Journal of Drug…•2023

  • Just have this come from their prescription pad: The medicalization of safer supply from the perspectives of health planners in BC, Canada

    Celeste Macevicius, Daniel Gudiño Pérez et al.•ARTICLE•Drugs Education Prevention and…•2024

    Context In March 2020, British Columbia introduced the Risk Mitigation Guidance (RMG) to enable the prescription of pharmaceutical substitutes for the unregulated drug market to decrease overdose deaths and COVID-19 infections. This study presents health planners’ perspectives on the RMG adoption within a medicalized system of care.Methods We conducted interviews with 28 health planners to obtain their views on implementation. We undertook a them…

  • “Everybody is impacted. Everybody's hurting”: Grief, loss and the emotional impacts of overdose on harm reduction workers

    Open Access•Gillian Kolla, Triti Khorasheh et al.•ARTICLE•International Journal of Drug…•2024

    Our study highlights opportunities for organizational practices that better support harm reduction workers, including formal emotional supports and community-based supportive care services. Improvement to the socio-economic-political determinants of work such as adequate compensation and access to full benefit packages are also needed in the harm reduction sector for all workers

  • Mapping a moral panic: News media narratives and medical expertise in public debates on safer supply, diversion, and youth drug use in Canada

    Open Access•Liam Michaud, Gillian Kolla et al.•ARTICLE•International Journal of Drug…•2024

    The ongoing overdose and drug toxicity crisis in North America has contributed momentum to the emergence of safer supply prescribing and programs in Canada as a means of providing an alternative to the highly volatile unregulated drug supply. The implementation and scale-up of safer supply have been met with a vocal reaction on the part of news media commentators, conservative politicians, recovery industry representatives, and some prominent add…

  • Prescribed safer opioid supply: A scoping review of the evidence

    Open Access•Shaleesa Ledlie, Ria Garg et al.•ARTICLE•International Journal of Drug…•2024

    BACKGROUND: Safer opioid supply programs provide prescription pharmaceutical opioids, often with supportive services, to people at high risk of experiencing harms related to substance use. However, questions regarding the effectiveness and safety of this practice remain. We conducted a scoping review of literature describing client outcomes from formal opioid supply programs providing prescriptions for pharmaceutical opioids, and the perceptions …

  • Safer Opioid Supply programs: Hydromorphone prescribing in Ontario as a harm reduction intervention to combat the drug poisoning crisis

    Open Access•Ruth A Schmidt, Rose A Schmidt et al.•ARTICLE•Canadian Journal of Public Health•2024•Cited by: 3•References: 27

    Our findings suggest that the combination of safer supply, wrap-around support, and harm reduction within primary care settings can lead to increased healthcare engagement, HIV/HCV prevention, testing, and treatment uptake, reducing the burden of infectious diseases and overdose risk. SSPs have the potential to meaningfully reduce overdose rates, address the ongoing overdose crisis, and if scaled up, influence population-level outcomes

  • The impact of the Covid-19 pandemic on access to harm reduction and treatment services among people who inject drugs in Toronto, Canada: A qualitative investigation

    Open Access•Gillian Kolla, Jeanette M Bowles et al.•ARTICLE•SSM - Qualitative Research in…•2025

    (230 words) The COVID-19 pandemic and related restrictions exacerbated Canada’s ongoing drug toxicity overdose crisis. Opioid agonist therapy (OAT), safer opioid supply (SOS), and supervised consumption sites (SCS) are interventions that aim to reduce risk of morbidity and mortality from drug toxicity and were affected by COVID-19. Between September and October 2020, we conducted qualitative interviews with 24 people who inject drugs receiving se…

  • Trends in varying modes of drug use in opioid toxicity deaths in Ontario from 2017 to 2021

    Open Access•Martha Macdonald, Clare Cheng et al.•ARTICLE•International Journal of Drug…•2025

Medicine (26 works) · Opioid Use Disorder Treatment (25 works) · HIV, Drug Use, Sexual Risk (21 works) · Nursing (14 works) · Sociology (14 works) · Business (13 works) · Psychology (13 works) · Public health (13 works) · Political science (12 works) · Harm reduction (11 works)

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