Bio-mycin 200 - 100ml Boehringer Ingelheim Now approved for lactating dairy cattle with a 96-hour milkout. Long-lasting broad-spectrum antibiotic for the treatment of a wide range of diseases caused by susceptible gram-positive and gram-negative bacteria. For use in all beef cattle, lactating & non-lactating dair cattle. Provides therapeutic blood levels for 3 days. Has non-irritating composition. Give 4.5 ml per 100 pounds IM or SQ in neck.