Tulathromycin A-d 7 (Tulathromycin-d 7 ) is deuterium labeled Tulathromycin A. Tulathromycin A (Tulathromycin), a macrolide antibiotic , inhibits protein synthesis (IC 50 =0.26 μM) by targeting bacterial ribosome. Tulathromycin A is used for the research of respiratory disease in cattle and swine. Immunomodulatory effects.