Fanning W L, Gump D, Jick H
Antimicrob Agents Chemother. 1976 Jul;10(1):80-2. doi: 10.1128/AAC.10.1.80.
Standardized rates of drug-attributed rises in blood urea nitrogen were 8.6%, 2.9%, and 9.3%, respectively, in patients receiving gentamicin alone, cephalothin alone, and both drugs together. These results provide evidence against a substantial synergism between the two drugs in the production of impaired renal function.