R. Heltsley

发表

Population Pharmacokinetics of Fentanyl in the Critically Ill*

E. Vasilevskis, P. Pandharipande, E. Ely, 2016, Critical Care Medicine.

Assessing organic contaminants in fish: comparison of a nonlethal tissue sampling technique to mobile and stationary passive sampling devices.

T. Kwak, R. Heltsley, W. Cope, 2005, Environmental science & technology.

Novel Methods for Monitoring Chlorinated Contaminants in Aquatic Environments

R. Heltsley, 2005 .

Urine drug testing of chronic pain patients. III. Normetabolites as biomarkers of synthetic opioid use.

R. Heltsley, E. Cone, Y. Caplan, 2010, Journal of analytical toxicology.

Urine drug testing of chronic pain patients. V. Prevalence of propoxyphene following its withdrawal from the United States market.

R. Heltsley, E. Cone, Y. Caplan, 2013, Journal of analytical toxicology.

Randomized Trial to Improve Primary Care Patient Management and Patient Outcomes Using a Drug–Drug Interaction Test: Confirmation of the DECART Simulated Patient Clinical Utility Trial Results

R. Heltsley, J. Peabody, M. C. Acelajado, 2021, Diagnostics.

Milk and serum standard reference materials for monitoring organic contaminants in human samples

J. M. Keller, A. Pintar, S. Wise, 2013, Analytical and Bioanalytical Chemistry.

Prescription opioids. III. Disposition of oxycodone in oral fluid and blood following controlled single-dose administration.

R. Heltsley, E. Cone, D. Black, 2015, Journal of analytical toxicology.

ENDOCRINE AND REPRODUCTIVE EFFECTS OF THE PHARMACEUTICAL FLUOXETINE ON NATIVE FRESHWATER MUSSELS: PROXIMITY TO MEASURED ENVIRONMENTAL CONCENTRATIONS

R. Heltsley, W. Cope, D. Shea, 2007 .

Prescription opioids. II. Metabolism and excretion patterns of hydrocodone in urine following controlled single-dose administration.

R. Heltsley, E. Cone, D. Black, 2013, Journal of analytical toxicology.

Prescription opioids. I. Metabolism and excretion patterns of oxycodone in urine following controlled single dose administration.

R. Heltsley, E. Cone, D. Black, 2013, Journal of analytical toxicology.

Screening indicators of dehydroepiandosterone, androstenedione, and dihydrotestosterone use: a literature review.

R. Heltsley, T. Robert, M. Shelby, 2011, Journal of analytical toxicology.

Clinical Variation in the Treatment Practices for Medication Nonadherence, Drug–Drug Interactions, and Recognition of Disease Progression in Patients with Chronic Cardiometabolic Diseases: A Cross-Sectional Patient Simulation Study among Primary Care Physicians

R. Heltsley, J. Peabody, David Paculdo, 2022, International journal of clinical practice.

Urine drug testing of chronic pain patients. IV. prevalence of gabapentin and pregabalin.

R. Heltsley, E. Cone, Y. Caplan, 2011, Journal of analytical toxicology.

Analysis of fentanyl pharmacokinetics, and its sedative effects and tolerance in critically ill children

Peter N. Johnson, Jamie L. Miller, R. Heltsley, 2021, Pharmacotherapy.

Environmental occurrence and reproductive effects of the pharmaceutical fluoxetine in native freshwater mussels

T. Newton, R. Heltsley, W. Cope, 2010, Environmental toxicology and chemistry.

Study of stability of high‐temperature polyimides using TG/MS technique

Fuquan Deng, W. Pan, R. Heltsley, 2002 .

Urine drug testing of chronic pain patients. II. Prevalence patterns of prescription opiates and metabolites.

R. Heltsley, E. Cone, Y. Caplan, 2010, Journal of analytical toxicology.

Prevalence of heroin markers in urine for pain management patients.

R. Heltsley, E. Cone, Y. Caplan, 2014, Forensic science international.

Chronic methamphetamine exposure produces a delayed, long‐lasting memory deficit

John T. Clark, R. Heltsley, J. Gamble-George, 2013, Synapse.

Oral fluid drug testing of chronic pain patients. II. Comparison of paired oral fluid and urine specimens.

R. Heltsley, E. Cone, Y. Caplan, 2012, Journal of analytical toxicology.

Prescription Opioids. IV: Disposition of Hydrocodone in Oral Fluid and Blood Following Single-Dose Administration.

R. Heltsley, E. Cone, D. Black, 2015, Journal of analytical toxicology.

Oral fluid drug testing of chronic pain patients. I. Positive prevalence rates of licit and illicit drugs.

R. Heltsley, E. Cone, Y. Caplan, 2011, Journal of analytical toxicology.

Prescription Opioids. VI. Metabolism and Excretion of Hydromorphone in Urine Following Controlled Single-Dose Administration.

R. Heltsley, E. Cone, D. Black, 2016, Journal of analytical toxicology.

Urine testing for norcodeine, norhydrocodone, and noroxycodone facilitates interpretation and reduces false negatives.

R. Heltsley, E. Cone, Y. Caplan, 2010, Forensic science international.

Determining zolpidem compliance: urinary metabolite detection and prevalence in chronic pain patients.

R. Heltsley, E. Cone, Y. Caplan, 2014, Journal of analytical toxicology.

Study of the processing chemistry of polyimides with thermogravimetry/Fourier transform infrared/mass spectrometry techniques

W. Pan, R. Heltsley, W. Xie, 2002 .

Randomized prospective trial to detect and distinguish between medication nonadherence, drug-drug interactions, and disease progression in chronic cardiometabolic disease

R. Heltsley, J. Peabody, David Paculdo, 2023, BMC Primary Care.

Mechanism of error caused by isotope-labeled internal standard: accurate method for simultaneous measurement of vitamin D and pre-vitamin D by liquid chromatography/tandem mass spectrometry.

R. Heltsley, Amy B. Cadwallader, Min Huang, 2014, Rapid communications in mass spectrometry : RCM.

Widespread Distribution of Xylazine Detected Throughout the United States in Healthcare Patient Samples

R. Heltsley, J. Schrecker, Kathy Le, 2023, Journal of addiction medicine.

Prevalence of synthetic cannabinoids in U.S. athletes: initial findings.

R. Heltsley, T. Robert, M. Shelby, 2012, Journal of analytical toxicology.

Presence of Parent Cocaine in the Absence of Benzoylecgonine in Urine.

R. Heltsley, B. Puet, David M. Schwope, 2018, Journal of analytical toxicology.

Urine drug testing of chronic pain patients. II. Prevalence patterns of prescription opiates and metabolites.

R. Heltsley, E. Cone, Y. Caplan, 2010, Journal of analytical toxicology.

Urine drug testing of chronic pain patients. V. Prevalence of propoxyphene following its withdrawal from the United States market.

R. Heltsley, E. Cone, Y. Caplan, 2013, Journal of analytical toxicology.

Oral fluid drug testing of chronic pain patients. I. Positive prevalence rates of licit and illicit drugs.

R. Heltsley, E. Cone, Y. Caplan, 2011, Journal of analytical toxicology.

Prescription opioids. II. Metabolism and excretion patterns of hydrocodone in urine following controlled single-dose administration.

R. Heltsley, E. Cone, D. Black, 2013, Journal of analytical toxicology.

Prescription opioids. I. Metabolism and excretion patterns of oxycodone in urine following controlled single dose administration.

R. Heltsley, E. Cone, D. Black, 2013, Journal of analytical toxicology.