G. Caleb Alexander, MD, MS

Assistant Professor of Epidemiology, Johns Hopkins University

Dr. Alexander is assistant professor of epidemiology in the Bloomberg School of Public Health with a joint appointment in the School of Medicine at Johns Hopkins University. He is a practicing general internist, health services researcher and pharmacoepidemiologist.

His research examines three interrelated areas of medication use: (1) patient-physician communication and decision-making regarding prescription drugs, (2) population-based patterns and determinants of pharmaceutical use, and (3) the impact of changes in pharmaceutical policy on pharmaceutical expenditures and utilization. To examine these areas, data is gathered from patient and physician surveys and secondary data sources including pharmacy and health claims and national audits of ambulatory-based care.

Recent and Noteworthy Publications

See more of Dr. Alexander's publications.

Kornfield R, Watson S, Higashi AS, Conti RM, Dusetzina SB, Garfield CF, Dorsey ER, Huskamp HA, Alexander GC. Effects of FDA advisories on the pharmacologic treatment of ADHD, 2004-2008. Psychiatr Serv. 2013 Apr 1;64(4):339-46. [See abstract.]

Kornfield R, Donohue J, Berndt ER, Alexander GC. Promotion of prescription drugs to consumers and providers, 2001-2010. PLoS One. 2013;8(3):e55504. Epub 2013 Mar 4. [See abstract.]

Kirley K, Qato DM, Kornfield R, Stafford RS, Alexander GC. National trends in oral anticoagulant use in the United States, 2007 to 2011. Circ Cardiovasc Qual Outcomes. 2012 Sep 1;5(5):615-21. Epub 2012 Sep 4.

Garfield CF, Dorsey ER, Zhu S, Huskamp HA, Conti R, Dusetzina SB, Higashi A, Perrin JM, Kornfield R, Alexander GC. Trends in attention deficit hyperactivity disorder ambulatory diagnosis and medical treatment in the United States, 2000-2010. Acad Pediatr. 2012 Mar-Apr;12(2):110-6. Epub 2012 Feb 10.

Alexander GC, Sehgal NL, Moloney RM, Stafford RS. National trends in treatment for Type 2 diabetes mellitus, 1994-2007. Arch Intern Med. 2008;168:2088-2094.

Qato DM, Alexander GC, Conti RM, Johnson M, Shumm P, Lindau ST. Use of prescription and over-the-counter medicines and dietary supplements among older adults in the United States: findings from a population-based study. JAMA. 2008;300:2967-2878.

Yin W, Basu A, Zhang J, Rabbani A, Meltzer DO, Alexander GC. Impact of the Medicare Part D Prescription Drug Benefit on drug utilization and out-of-pocket expenditures. Ann Intern Med. 2008;148:169-177.

Dai C, Stafford RS, Alexander GC. National trends in Cox-2 inhibitor use since market release: nonselective diffusion of a selectively cost-effective innovation. Arch Intern Med. 2005;165:171-177.