Uses Indicated for the treatment of subclinical mastitis caused by susceptible strains of Staphylococcus aureus and Streptococcus agalactiae in dry cows. Key Features Provides synergistic antibiotic combination of penicillin and novobiocin. Bactericidal activity against major Staphylococcus and Streptococcus mastitis pathogens. Ideal duration of activity during the involution phase of the dry cow period (two to three weeks after milking stops), when the keratin plug has not formed and the cow is susceptible to infection. Contents of one syringe are infused into each quarter at dry off. 72-hour milk withhold following calving.* 30-day** pre-slaughter withdrawal required following administration. *After last administration (or treatment). **Milk discard time begins at first milking post-freshening and requires completion of a minimum dry cow period.