Gary M Reisfield

Gary M Reisfield, M.D.

Associate Professor

Department: MD-PSYCHIATRY
Business Phone: (352) 265-3284
Business Email: garyr@ufl.edu

About Gary M Reisfield

After receiving his medical degree from the George Washington University School of Medicine, Dr. Reisfield completed an anesthesiology residency at the University of Florida and a pain medicine fellowship at the Massachusetts General Hospital/Harvard University. Dr. Reisfield subsequently served as a hospice medical director and a pain and palliative medicine division chief at the University of Florida in Jacksonville. As a part of his transition to the University of Florida in Gainesville, Dr. Reisfield completed an addiction medicine fellowship in the department of psychiatry.

Dr. Reisfield is board certified in anesthesiology, addiction medicine, and pain medicine. He is a clinician-researcher and has authored more than 75 articles and book chapters. He currently serves as a forensic expert in the UF Forensic Psychiatry Division. Dr. Reisfield’s forensic expertise includes pain management, substance use disorders, diminished capacity due to intoxication and other impairment issues.

Accomplishments

Alyssa LeBel Fellowship Teaching Award
1997 · Massachusetts General Hospital
Member
1985 · Kane-King Obstetrical Honor Society
Member
1985 · Alpha Omega Alpha Medical Honor Society
American Cancer Society Fellowship
1982 · University of Miami

Board Certifications

  • Addiction Medicine
    American Association of Physician Specialists
  • Pain Management
    American Association of Physician Specialists

Clinical Profile

Specialties
  • Psychiatry
Subspecialties
  • Addiction Medicine
  • Pain Medicine
Areas of Interest
  • Alcohol withdrawal
  • Barbiturate intoxication and overdose
  • Cancer treatment information
  • Cocaine intoxication
  • Cocaine withdrawal
  • Heroin overdose
  • Marijuana intoxication
  • Opiate and opioid withdrawal
  • Opioid intoxication
  • Pain medications – narcotics
  • Substance use disorder

Research Profile

Areas of Interest
  • Addiction medicine
  • Drug testing
  • Pain medicine

Publications

2021
Association Between Dual Trajectories of Opioid and Gabapentinoid Use and Healthcare Expenditures Among US Medicare Beneficiaries.
Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research. 24(2):196-205 [DOI] 10.1016/j.jval.2020.12.001. [PMID] 33518026.
2021
Dual-trajectories of opioid and gabapentinoid use and risk of subsequent drug overdose among Medicare beneficiaries in the United States: a retrospective cohort study.
Addiction (Abingdon, England). 116(4):819-830 [DOI] 10.1111/add.15189. [PMID] 32648951.
2021
Utilization patterns of skeletal muscle relaxants among commercially insured adults in the United States from 2006 to 2018.
Pain medicine (Malden, Mass.). [DOI] 10.1093/pm/pnab088. [PMID] 33690860.
2020
Blood Phosphatidylethanol (PEth) Concentrations Following Regular Exposure to an Alcohol-Based Mouthwash.
Journal of analytical toxicology. [DOI] 10.1093/jat/bkaa147. [PMID] 33024993.
2020
Persistent Urinary Ethyl Sulfate in the Absence of Urinary Ethyl Glucuronide in a Patient with Alcohol Use Disorder Who Claimed Abstinence.
Journal of analytical toxicology. 44(6):623-626 [DOI] 10.1093/jat/bkaa014. [PMID] 32091106.
2020
Publishing Consensus Conference Proceedings: Can We Avoid Missed Opportunities While Effectively Managing Bias?
Pain medicine (Malden, Mass.). 21(4):658-659 [DOI] 10.1093/pm/pnaa035. [PMID] 32150244.
2020
Risk of Opioid Overdose Associated With Concomitant Use of Opioids and Skeletal Muscle Relaxants: A Population-Based Cohort Study.
Clinical pharmacology and therapeutics. 108(1):81-89 [DOI] 10.1002/cpt.1807. [PMID] 32022906.
2020
The roles of phosphatidylethanol, ethyl glucuronide, and ethyl sulfate in identifying alcohol consumption among participants in professionals health programs.
Drug testing and analysis. 12(8):1102-1108 [DOI] 10.1002/dta.2809. [PMID] 32309913.
2019
Impact of Schedule IV controlled substance classification on carisoprodol utilization in the United States: An interrupted time series analysis.
Drug and alcohol dependence. 202:172-177 [DOI] 10.1016/j.drugalcdep.2019.05.025. [PMID] 31352307.
2019
Overlapping prescriptions of opioids, benzodiazepines, and carisoprodol: “Holy Trinity” prescribing in the state of Florida.
Drug and alcohol dependence. 205 [DOI] 10.1016/j.drugalcdep.2019.107693. [PMID] 31751873.
2018
Rapid Expansion of the Opioid Ecosystem: National Implications for Prescriber-Pharmacist Communication.
American journal of preventive medicine. 55(5):656-661 [DOI] 10.1016/j.amepre.2018.05.003. [PMID] 30219211.
2017
Opioid Use Disorders, Medication-Assisted Treatment, and the Role of the Laboratory.
Laboratory medicine. 48(4):e57-e61 [DOI] 10.1093/labmed/lmx054. [PMID] 29096016.
2017
The Elusive Standard of Care.
The journal of the American Academy of Psychiatry and the Law. 45(3):358-364 [PMID] 28939735.
View on: PubMed
2017
Trends in Florida’s Prescription Drug Monitoring Program registration and utilization: Implications for increasing voluntary use.
Journal of opioid management. 13(5):283-289 [DOI] 10.5055/jom.2017.0397. [PMID] 29199394.
2017
Trends in Florida’s Prescription Drug Monitoring Program registration and utilization: implications for increasing voluntary use
. 13:283-289
2016
Predictive Value of Positive Drug Screening Results in an Urban Outpatient Population.
Journal of analytical toxicology. 40(9):726-731 [PMID] 27550994.
View on: PubMed
2015
Acute Pain Medicine in the United States: A Status Report.
Pain medicine (Malden, Mass.). 16(9):1806-26 [DOI] 10.1111/pme.12760. [PMID] 26535424.
2015
Choosing the right laboratory: a review of clinical and forensic toxicology services for urine drug testing in pain management
. 11:37-44
2015
Choosing the right laboratory: a review of clinical and forensic toxicology services for urine drug testing in pain management.
Journal of opioid management. 11(1):37-44 [DOI] 10.5055/jom.2015.0250. [PMID] 25750163.
2015
Eight principles for safer opioid prescribing and cautions with benzodiazepines.
Postgraduate medicine. 127(1):27-32 [PMID] 25526233.
View on: PubMed
2015
Opioid use in pregnant women and the increase in neonatal abstinence syndrome: what is the cost?
Journal of addiction medicine. 9(3):222-5 [DOI] 10.1097/ADM.0000000000000122. [PMID] 25984838.
2015
Sensitivity of an opiate immunoassay for detecting hydrocodone and hydromorphone in urine from a clinical population: analysis of subthreshold results
Journal of Analytical Toxicology. 24-8 [DOI] 10.1093/jat/bku109. [PMID] 25288720.
2015
Sensitivity of an opiate immunoassay for detecting hydrocodone and hydromorphone in urine from a clinical population: analysis of subthreshold results.
Journal of analytical toxicology. 39(1):24-8 [DOI] 10.1093/jat/bku109. [PMID] 25288720.
2015
The Disposition of Oxycodone and Metabolite in Human Hair.
Journal of analytical toxicology. 39(9):746-50 [DOI] 10.1093/jat/bkv076. [PMID] 26178162.
2015
Urine Spiking in a Pain Medicine Clinic: An Attempt to Simulate Adherence.
Pain medicine (Malden, Mass.). 16(7):1449-51 [DOI] 10.1111/pme.12663. [PMID] 25522892.
2014
OxyContin, the FDA, and Drug Control.
The virtual mentor : VM. 16(4):279-83 [DOI] 10.1001/virtualmentor.2014.16.04.pfor1-1404. [PMID] 24735577.
2014
Urine drug testing in long-term opioid therapy: ethical considerations
Clinical Journal of Pain. 679-84 [DOI] 10.1097/01.ajp.0000435448.34761.c9. [PMID] 24281293.
2014
Urine drug testing in long-term opioid therapy: ethical considerations.
The Clinical journal of pain. 30(8):679-84 [DOI] 10.1097/01.ajp.0000435448.34761.c9. [PMID] 24281293.
2013
A protocol to evaluate drug-related workplace impairment.
Journal of pain & palliative care pharmacotherapy. 27(1):43-8 [DOI] 10.3109/15360288.2012.753975. [PMID] 23527668.
2013
Abuse liability measures for use in analgesic clinical trials in patients with pain: IMMPACT recommendations.
Pain. 154(11):2324-2334 [DOI] 10.1016/j.pain.2013.06.035. [PMID] 24148704.
2013
Benzodiazepines in long-term opioid therapy.
Pain medicine (Malden, Mass.). 14(10):1441-6 [DOI] 10.1111/pme.12236. [PMID] 24010730.
2013
Clinical decisions. Medicinal use of marijuana.
The New England journal of medicine. 368(9):866-8 [DOI] 10.1056/NEJMclde1300970. [PMID] 23425133.
2013
Medicinal use of marijuana. Recommend against the medicinal use of cannabis
New England Journal of Medicine. 368(9):866-868
2012
Methadone in the chronic pain patient with a substance use disorder.
Journal of pain & palliative care pharmacotherapy. 26(4):368-70 [DOI] 10.3109/15360288.2012.734906. [PMID] 23216175.
2012
Physician identification of opioid diversion: a difficult diagnosis
. 8(1):5-6
2012
Physician identification of opioid diversion: a difficult diagnosis.
Journal of opioid management. 8(1):5-6 [PMID] 22479879.
View on: PubMed
2012
Psychoactive “bath salts” intoxication with methylenedioxypyrovalerone.
The American journal of medicine. 125(9):854-8 [DOI] 10.1016/j.amjmed.2012.02.019. [PMID] 22682791.
2012
Rethinking methadone for the management of chronic pain
. 8(5):271-272
2012
Rethinking methadone for the management of chronic pain.
Journal of opioid management. 8(5):271-2 [DOI] 10.5055/jom.2012.0126. [PMID] 23264283.
2012
The mirage of impairing drug concentration thresholds: a rationale for zero tolerance per se driving under the influence of drugs laws.
Journal of analytical toxicology. 36(5):353-6 [DOI] 10.1093/jat/bks037. [PMID] 22582272.
2011
Blocks of the sympathetic axis for visceral pain, 2nd edition #97.
Journal of palliative medicine. 14(4):510-1 [DOI] 10.1089/jpm.2011.9707. [PMID] 21469990.
2011
Ethyl glucuronide, ethyl sulfate, and ethanol in urine after intensive exposure to high ethanol content mouthwash.
Journal of analytical toxicology. 35(5):264-8 [PMID] 21619720.
View on: PubMed
2011
Ethyl glucuronide, ethyl sulfate, and ethanol in urine after sustained exposure to an ethanol-based hand sanitizer.
Journal of analytical toxicology. 35(2):85-91 [PMID] 21396227.
View on: PubMed
2011
Re: “estimates of nondisclosure of cigarette smoking among pregnant and nonpregnant women of reproductive age in the United States”.
American journal of epidemiology. 173(9):1095-6 [DOI] 10.1093/aje/kwr073. [PMID] 21460381.
2011
Respiratory exposure to ethanol vapor during use of hand sanitizers: is it significant?
Journal of analytical toxicology. 35(5):319-20 [PMID] 21929874.
View on: PubMed
2011
Urinary ethanol metabolites following intensive exposure to a hand sanitizer
Annals of Clinical & Laboratory Science. 41(4)
2010
Karch’s Pathology of Drug Abuse
Journal of Analytical Toxicology. 34(2):14A-15A
2010
Medical cannabis and chronic opioid therapy.
Journal of pain & palliative care pharmacotherapy. 24(4):356-61 [DOI] 10.3109/15360288.2010.519431. [PMID] 21133743.
2010
Opioid prescription underfilling among retail pharmacies.
Pain medicine (Malden, Mass.). 11(4):586-90 [DOI] 10.1111/j.1526-4637.2009.00792.x. [PMID] 20113412.
2010
Urine Drug Testing Is Still An Invaluable Resource for Primary Care
. 153
2010
Urine drug testing is still an invaluable resource for primary care.
Annals of internal medicine. 153(6):420; author reply 420-1 [DOI] 10.7326/0003-4819-153-6-201009210-00018. [PMID] 20855813.
2009
‘False-positive’ and ‘false-negative’ test results in clinical urine drug testing.
Bioanalysis. 1(5):937-52 [DOI] 10.4155/bio.09.81. [PMID] 21083064.
2009
Are some physicians unwitting enablers of prescription opioid abuse
. 5(2):71-73
2009
Are some physicians unwitting enablers of prescription opioid abuse?
Journal of opioid management. 5(2):71-3 [PMID] 19507802.
View on: PubMed
2009
Minor metabolic products of opiate metabolism: potential for misinterpretation of urine drug test results
Annals of Clinical & Laboratory Science. 39(2):205-206
2009
Substance use disorders in the palliative care patient #127.
Journal of palliative medicine. 12(5):475-6 [DOI] 10.1089/jpm.2009.9630. [PMID] 19416045.
2009
The prevalence and significance of cannabis use in patients prescribed chronic opioid therapy: a review of the extant literature.
Pain medicine (Malden, Mass.). 10(8):1434-41 [DOI] 10.1111/j.1526-4637.2009.00726.x. [PMID] 19793342.
2009
Unexpected urine drug testing results in a hospice patient on high-dose morphine therapy.
Clinical chemistry. 55(10):1765-8 [DOI] 10.1373/clinchem.2008.122754. [PMID] 19786586.
2009
Xerostomia, second edition #182.
Journal of palliative medicine. 12(2):189-90 [DOI] 10.1089/jpm.2009.9670. [PMID] 19207065.
2008
“Practical Guide” To Urine Drug Screening Clarified
. 83:848-849
2008
“Practical guide” to urine drug screening clarified.
Mayo Clinic proceedings. 83(7):848-9; author reply 849 [DOI] 10.4065/83.7.848. [PMID] 18614000.
2008
Cocaine metabolite assay results in patients taking amoxicillin: Is there interference
Annals of Clinical & Laboratory Science. 38(2)
2008
Failure of amoxicillin to produce false-positive urine screens for cocaine metabolite.
Journal of analytical toxicology. 32(4):315-8 [PMID] 18430300.
View on: PubMed
2008
Health literacy in palliative medicine #153.
Journal of palliative medicine. 11(1):105-6 [DOI] 10.1089/jpm.2008.9990. [PMID] 18370900.
2007
Family physicians’ proficiency in urine drug test interpretation.
Journal of opioid management. 3(6):333-7 [PMID] 18290585.
View on: PubMed
2007
Family physicians’ proficiency in urine drug test interpretation
. 3(6):333-337
2007
Interpretation of urine drug tests: what do physicians know
. 3(2):80-86
2007
Opiates and opioids: what a difference a name makes
. 3(4):179-181
2007
Opiates and opioids: what a difference a name makes.
Journal of opioid management. 3(4):179-80 [PMID] 17957975.
View on: PubMed
2007
Palliative care issues in heart failure #144.
Journal of palliative medicine. 10(1):247-8 [PMID] 17298274.
View on: PubMed
2007
Prognostication in heart failure #143.
Journal of palliative medicine. 10(1):245-6 [PMID] 17298273.
View on: PubMed
2007
Rational use and interpretation of urine drug testing in chronic opioid therapy.
Annals of clinical and laboratory science. 37(4):301-14 [PMID] 18000286.
View on: PubMed
2007
Rational use of sublingual opioids in palliative medicine.
Journal of palliative medicine. 10(2):465-75 [PMID] 17472518.
View on: PubMed
2007
Urine drug test interpretation: what do physicians know?
Journal of opioid management. 3(2):80-6 [PMID] 17520987.
View on: PubMed
2006
Survival in cancer patients undergoing in-hospital cardiopulmonary resuscitation: a meta-analysis.
Resuscitation. 71(2):152-60 [PMID] 16987581.
View on: PubMed
2005
“Johnny can’t read”: another cause of failed analgesia
The American Journal Of Hospice & Palliative Care. 433-6 [DOI] 10.1177/104990910502200608. [PMID] 16323713.
2005
“Johnny can’t read”: another cause of failed analgesia.
The American journal of hospice & palliative care. 22(6):433-6 [PMID] 16323713.
View on: PubMed
2005
Evaluation of chronic dyspnea.
American family physician. 71(8):1529-37 [PMID] 15864893.
View on: PubMed
2005
Grace in futility
Palliative Medicine. 8(6):1285-1286
2005
Radiopharmaceuticals for the palliation of painful bone metastases
The American Journal Of Hospice & Palliative Care. 41-6 [DOI] 10.1177/104990910502200110. [PMID] 15736606.
2005
Radiopharmaceuticals for the palliation of painful bone metastases.
The American journal of hospice & palliative care. 22(1):41-6 [PMID] 15736606.
View on: PubMed
2005
The metamorphosis of hydromorphone
. 1(3):139-145
2005
The metamorphosis of hydromorphone.
Journal of opioid management. 1(3):139-45 [PMID] 17315417.
View on: PubMed
2005
What can we learn from baseball’s steroid scandal?
Journal of opioid management. 1(5):237-9 [PMID] 17319555.
View on: PubMed
2005
What can we learn from baseball’s steroid scandals?
. 1(5):237-239
2005
When palliative medicine is palliative care.
The American journal of hospice & palliative care. 22(4):255-7 [PMID] 16082909.
View on: PubMed
2004
Advance care planning redux: it’s time to talk.
The American journal of hospice & palliative care. 21(1):7-9 [PMID] 14748516.
View on: PubMed
2004
Blocks of the sympathetic axis for visceral pain #97.
Journal of palliative medicine. 7(1):75-6 [PMID] 15000786.
View on: PubMed
2004
Intrathecal drug therapy for pain #98.
Journal of palliative medicine. 7(1) [PMID] 15000787.
View on: PubMed
2004
The cost of breathing: an economic analysis of the patient cost of home oxygen therapy.
The American journal of hospice & palliative care. 21(5):348-52 [PMID] 15510571.
View on: PubMed
2004
Use of metaphor in the discourse on cancer.
Journal of clinical oncology : official journal of the American Society of Clinical Oncology. 22(19):4024-7 [PMID] 15459229.
View on: PubMed
2003
Ambiguity in end-of-life communications
American Journal of Clinical Oncology. 2(2):61-66
2003
Management of intractable ascites with an indwelling drainage catheter
The American Journal Of Hospice & Palliative Care. 6(5):787-791
2003
Management of intractable, cirrhotic ascites with an indwelling drainage catheter.
Journal of palliative medicine. 6(5):787-91 [PMID] 14622465.
View on: PubMed
2003
More patients served by hospice, but still a last resort.
The American journal of hospice & palliative care. 20(3):173-4 [PMID] 12785037.
View on: PubMed
2003
Morphine hyperalgesia: a case report.
The American journal of hospice & palliative care. 20(6):459-61 [PMID] 14649563.
View on: PubMed
2000
Adherence monitoring and drug surveillance in chronic opioid therapy.
Journal of pain and symptom management. 20(4):293-307 [PMID] 11027912.
View on: PubMed

Grants

Jul 2020 ACTIVE
Win-win: A University of Florida model for training addiction medicine fellows and incorporating behavioral healthcare into the primary care of the medically underserved
Role: Co-Investigator
Funding: US HLTH RESOURCES AND SERV ADMN
May 2019 ACTIVE
Developing a Real-Time Trajectory Tool to Identify Potentially Unsafe Concurrent Opioid and Benzodiazepine Use among Older Adults
Role: Co-Investigator
Funding: NATL INST OF HLTH NIA
May 2017 – Mar 2018
Evaluation of High-Risk Prescribing in Florida
Role: Co-Investigator
Funding: FL DEPT OF HLTH via US DEPT OF JUSTICE
Oct 2016 – Mar 2020
FL's Next Gen of Prescription Drug Related Surveillance: Data into Insights that Enhance PDMP Best Practices
Role: Co-Investigator
Funding: US DEPT OF JUSTICE

Education

Fellowship – Psychiatry
2010 · University of Florida
Fellowship – Pain Management
1997 · Massachusetts General Hospital
Residency – Anesthesiology
1989 · University of Florida
Internship – Internal Medicine
1986 · George Washington University
Medical Degree
1985 · George Washington University

Teaching Profile

Courses Taught
2014-2016,2018
MDT7840 Elect Top/Psychiatry
2018
MDC7830 Psychiatry Clerkship

Contact Details

Phones:
Business:
(352) 265-3284
Emails:
Business:
garyr@ufl.edu