Works by Flegel, Ronald R

Results: 16

Prescription Opioids. II. Metabolism and Excretion Patterns of Hydrocodone in Urine Following Controlled Single-Dose Administration.

Published in:

Journal of Analytical Toxicology, 2013, v. 37, n. 8, p. 486, doi. 10.1093/jat/bkt066

By:

Cone, Edward J.;
Heltsley, Rebecca;
Black, David L.;
Mitchell, John M.;
LoDico, Charles P.;
Flegel, Ronald R.

Publication type:

Article

Prescription Opioids. I. Metabolism and Excretion Patterns of Oxycodone in Urine Following Controlled Single Dose Administration.

Published in:

Journal of Analytical Toxicology, 2013, v. 37, n. 5, p. 255, doi. 10.1093/jat/bkt031

By:

Cone, Edward J.;
Heltsley, Rebecca;
Black, David L.;
Mitchell, John M.;
LoDico, Charles P.;
Flegel, Ronald R.

Publication type:

Article

Evaluation of the 20% D-Methamphetamine Requirement for Determining Illicit Use of Methamphetamine in Urine.

Published in:

Journal of Analytical Toxicology, 2012, v. 36, n. 6, p. 399, doi. 10.1093/jat/bks042

By:

Esposito, Francis M.;
Crumpton, Susan;
Mitchell, John;
Flegel, Ronald R.

Publication type:

Article

Systematic web monitoring of drug test subversion strategies in the United States.

Published in:

Drug Testing & Analysis, 2025, v. 17, n. 1, p. 34, doi. 10.1002/dta.3671

By:

Grabenauer, Megan;
Vikingsson, Svante;
Olson, Richard A.;
Lyons, Faith E.;
Davis, Lisa S.;
Hayes, Eugene D.;
Flegel, Ronald R.

Publication type:

Article

Developing Standards for Oral Fluid as an Alternative Matrix for Toxicology Testing.

Published in:

Clinical Laboratory News, 2017, v. 43, n. 11, p. 18

By:

FLEGEL, RONALD R.;
HUMBERT, CAROLYN

Publication type:

Article

Δ9-Tetrahydrocannabinol and 11-hydroxy-Δ9-tetrahydrocannabinol as markers of cannabis use in urinary drug testing.

Published in:

Journal of Analytical Toxicology, 2024, v. 48, n. 9, p. 710, doi. 10.1093/jat/bkae070

By:

Vikingsson, Svante;
Winecker, Ruth E;
Cone, Edward J;
Kuntz, David J;
Hayes, Eugene D;
Flegel, Ronald R;
Davis, Lisa S

Publication type:

Article

Fentanyl as a marker of illicit drug use in morphine-positive urine specimens from workplace drug testing.

Published in:

Journal of Analytical Toxicology, 2024, v. 48, n. 3, p. 185, doi. 10.1093/jat/bkae003

By:

Vikingsson, Svante;
Winecker, Ruth E;
Kuntz, David J;
Clark, Michael;
Jacques, Martin;
Hart, E Dale;
Hayes, Eugene D;
Flegel, Ronald R;
Davis, Lisa S

Publication type:

Article

Pharmacokinetics and pharmacodynamics of five distinct commercially available hemp-derived topical cannabidiol products.

Published in:

Journal of Analytical Toxicology, 2024, v. 48, n. 2, p. 81, doi. 10.1093/jat/bkae001

By:

Zamarripa, C Austin;
Tilton, Hayleigh E;
Lin, Spencer;
Cone, Edward J;
Winecker, Ruth E;
Flegel, Ronald R;
Kuntz, David;
Beals, Melissa;
Jacques, Martin;
Clark, Michael;
Welsh, Eric R;
Wagner, Lynn;
Bonn-Miller, Marcel O;
Vandrey, Ryan;
Spindle, Tory R

Publication type:

Article

Prevalence of ∆8-tetrahydrocannabinol carboxylic acid in workplace drug testing.

Published in:

Journal of Analytical Toxicology, 2023, n. 8, p. 719, doi. 10.1093/jat/bkad068

By:

Vikingsson, Svante;
Hart, E. Dale;
Winecker, Ruth E;
Cone, Edward J;
Kuntz, David J;
Clark, Michael;
Jacques, Martin;
Hayes, Eugene D;
Flegel, Ronald R

Publication type:

Article

Conversion of water-soluble CBD to ∆9-THC in synthetic gastric fluid—An unlikely cause of positive drug tests.

Published in:

2023

By:

Hart, E. Dale;
Mullen, Lawrance;
Vikingsson, Svante;
Cone, Edward J;
Winecker, Ruth E;
Hayes, Eugene D;
Flegel, Ronald R

Publication type:

Case Study

Performance of Hair Testing for Cocaine Use—Comparison of Five Laboratories Using Blind Reference Specimens.

Published in:

Journal of Analytical Toxicology, 2023, v. 47, n. 2, p. 154, doi. 10.1093/jat/bkac066

By:

Hart, E Dale;
Vikingsson, Svante;
Winecker, Ruth E;
Evans, Amy L;
Cone, Edward J;
Mitchell, John M;
Hayes, Eugene D;
Flegel, Ronald R

Publication type:

Article

Prevalence of Cannabidiol, ∆9- and ∆8-Tetrahydrocannabinol and Metabolites in Workplace Drug Testing Urine Specimens.

Published in:

Journal of Analytical Toxicology, 2022, v. 46, n. 8, p. 866, doi. 10.1093/jat/bkac013

By:

Vikingsson, Svante;
Winecker, Ruth E;
Cone, Edward J;
Kuntz, David J;
Dorsey, Brian;
Jacques, Martin;
Senter, Melanie;
Flegel, Ronald R;
Hayes, Eugene D

Publication type:

Article

Update on Urine Adulterants and Synthetic Urine Samples to Subvert Urine Drug Testing.

Published in:

Journal of Analytical Toxicology, 2022, v. 46, n. 7, p. 697, doi. 10.1093/jat/bkac029

By:

Vikingsson, Svante;
Krauss, Shannon T;
Winecker, Ruth E;
Flegel, Ronald R;
Hayes, Eugene D

Publication type:

Article

Urinary Pharmacokinetic Profile of Cannabidiol (CBD), Δ9-Tetrahydrocannabinol (THC) and Their Metabolites following Oral and Vaporized CBD and Vaporized CBD-Dominant Cannabis Administration.

Published in:

Journal of Analytical Toxicology, 2022, v. 46, n. 5, p. 494, doi. 10.1093/jat/bkab059

By:

Sholler, Dennis J;
Spindle, Tory R;
Cone, Edward J;
Goffi, Elia;
Kuntz, David;
Mitchell, John M;
Winecker, Ruth E;
Bigelow, George E;
Flegel, Ronald R;
Vandrey, Ryan

Publication type:

Article

Cannabinoid Content and Label Accuracy of Hemp-Derived Topical Products Available Online and at National Retail Stores.

Published in:

JAMA Network Open, 2022, v. 5, n. 7, p. e2223019, doi. 10.1001/jamanetworkopen.2022.23019

By:

Spindle, Tory R.;
Sholler, Dennis J.;
Cone, Edward J.;
Murphy, Timothy P.;
ElSohly, Mahmoud;
Winecker, Ruth E.;
Flegel, Ronald R.;
Bonn-Miller, Marcel O.;
Vandrey, Ryan

Publication type:

Article

Cannabinoid Content and Label Accuracy of Hemp-Derived Topical Products Available Online and at National Retail Stores.

Published in:

JAMA Network Open, 2022, v. 5, n. 7, p. 1, doi. 10.1001/jamanetworkopen.2022.23019

By:

Spindle, Tory R.;
Sholler, Dennis J.;
Cone, Edward J.;
Murphy, Timothy P.;
ElSohly, Mahmoud;
Winecker, Ruth E.;
Flegel, Ronald R.;
Bonn-Miller, Marcel O.;
Vandrey, Ryan

Publication type:

Article

Works by Flegel, Ronald R

Prescription Opioids. II. Metabolism and Excretion Patterns of Hydrocodone in Urine Following Controlled Single-Dose Administration.

Prescription Opioids. I. Metabolism and Excretion Patterns of Oxycodone in Urine Following Controlled Single Dose Administration.

Evaluation of the 20% D-Methamphetamine Requirement for Determining Illicit Use of Methamphetamine in Urine.

Systematic web monitoring of drug test subversion strategies in the United States.

Developing Standards for Oral Fluid as an Alternative Matrix for Toxicology Testing.

Δ<sup>9</sup>-Tetrahydrocannabinol and 11-hydroxy-Δ<sup>9</sup>-tetrahydrocannabinol as markers of cannabis use in urinary drug testing.

Fentanyl as a marker of illicit drug use in morphine-positive urine specimens from workplace drug testing.

Pharmacokinetics and pharmacodynamics of five distinct commercially available hemp-derived topical cannabidiol products.

Prevalence of ∆<sup>8</sup>-tetrahydrocannabinol carboxylic acid in workplace drug testing.

Conversion of water-soluble CBD to ∆<sup>9</sup>-THC in synthetic gastric fluid—An unlikely cause of positive drug tests.

Performance of Hair Testing for Cocaine Use—Comparison of Five Laboratories Using Blind Reference Specimens.

Prevalence of Cannabidiol, ∆9- and ∆8-Tetrahydrocannabinol and Metabolites in Workplace Drug Testing Urine Specimens.

Update on Urine Adulterants and Synthetic Urine Samples to Subvert Urine Drug Testing.

Urinary Pharmacokinetic Profile of Cannabidiol (CBD), Δ9-Tetrahydrocannabinol (THC) and Their Metabolites following Oral and Vaporized CBD and Vaporized CBD-Dominant Cannabis Administration.

Cannabinoid Content and Label Accuracy of Hemp-Derived Topical Products Available Online and at National Retail Stores.

Cannabinoid Content and Label Accuracy of Hemp-Derived Topical Products Available Online and at National Retail Stores.