- Chapman, E. N. (Edwin Nesbit), 1819-18881
- Chapman, E. N. (Edwin Nesbit), 1819-1888, author1
- Chapman, Nathaniel, 1780-18539
- Clarke, Edward H. (Edward Hammond), 1820-18772
- Colbatch, John, Sir, 1670-17291
- Coleman, Warren, 1869- , author1
- College of Physicians and Surgeons in the City of New York.1
- Coste, Jean-François, 1741-18191
- Council on Pharmacy and Chemistry (American Medical Association), author.1
- Cowperthwaite, A. C. (Allen Corson), 1848-19264
- Coxe, John Redman, 1773-18642
- Cullen, William, 1710-17909
- Culpeper, Nicholas, 1616-16541
- Dake, J. P. (Jabez Philander), 1827-1894, author1
- Dancer, Thomas.2
- Darrach, William, 1796-18658
- Darwin, Erasmus, 1731-18023
- David, Wm. K. (William King)1
- Dewey, Willis A. (Willis Alonzo), 1858-19382
- Dioscorides Pedanius, of Anazarbos3