Macrosyn Injectable Solution is an antibiotic indicated for the treatment of bovine respiratory disease (BRD), infectious bovine keratoconjunctivitis (pinkeye), and foot rot in beef and non-lactating dairy cattle and for treatment and control of swine respiratory disease (SRD) in swine. Each ml contains 100 mg tulathromycin. The usual recommended dosage of Macrosyn is 1.1 ml per 100 lbs. body weight, given in the neck. Do not administer more than 10 ml SQ per injection site in cattle. One dose provides up to 7-14 days BRD treatment and control. Do not administer more than 5 ml IM per injection site in swine. Not for use in female dairy cattle 20 months of age or older, or in calves to be processed for veal.
