Trimethoprim, Metioprim, Tetroxoprim, and RO 10‐5970 in Canine Bone

Abstract
The penetration of trimethoprim and 3 derivatives into bone tissue was investigated in a dog model. The trimethoprim derivative RO 10-5970 [brodinoprim] concentrates well in bone tissue with median tissue-to-serum concentration ratios of 0.23 in cortical bone and 0.81 in both medulla and cancellous bone. The use of RO 10-5970 in osseous infections is appealing because oral administration is possible.