Splenic lymphoid sheath reduction and thymic cortical atrophy in rats after IV dosing
“Following IV administration of lefamulin to rats for 4 or 13 weeks, anemia (all doses), increased coagulation times, and lower organ weights and histopathological changes in spleen (decreased peri-arteriolar lymphoid sheath, decreased size of the marginal zone) and thymus (cortical atrophy) were seen in rats”
Rapid, wide tissue distribution in rat QWBA; skin, soft tissues and lung exceed blood levels
“A quantitative whole-body autoradiography in rats after IV bolus administration showed a rapid distribution into tissues and organs consistent with the apparent low protein binding affinity observed in vitro.”