RT Journal A1 Wigton RS, Johnson SH T1 PReparations of sulfanilamide JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1939 FD January 21 VO 112 IS 3 SP 262 OP 262 DO 10.1001/jama.1939.02800030072025 UL http://dx.doi.org/10.1001/jama.1939.02800030072025 AB To the Editor:—  We would like to correct a source of confusion regarding the terminology as used in our article "Peripheral Neuritis Following Sulfanilyl-Sulfanilamide (Disulfanilamide)" published in the Oct. 29, 1938, issue of The Journal, page 1641.Disulon, prepared by the Alba Pharmaceutical Company, Inc., is sulfanilyl-sulfanilamide (synonyms, DB 32, disulfanilamide, DPR 374, diseptal C).Uleron, prepared by the Winthrop Chemical Company, is dimethyl-disulfanilamide (synonyms, DB 90, DPR 373, diseptal A).There is a third "disulfanilamide" compound termed Diseptal B, or DB 87, which is monomethyl-disulfanilamide.Patient 2 in the article received Uleron, which was not furnished by the Winthrop Chemical Company but was obtained by the family physician from Germany. The other patients received Disulon.