Gamrozyne

Gamrozyne™ Injectable Solution

Gamrozyne™ is a fast-acting, prescription-only injectable macrolide antibiotic for the treatment and control of Bovine Respiratory Disease (BRD) in beef and non-lactating dairy cattle. It is the first and only bioequivalent to Zactran® (gamithromycin) approved in the U.S., offering veterinarians and producers a reliable, cost-effective treatment option.

Key Benefits

• Rapid onset: Reaches target lung tissue within approximately 30 minutes. 

• Extended duration: A single dose provides up to 10 days of therapeutic coverage.

• Bioequivalent alternative: Matches the safety and performance profile of the pioneer product Zactran®. 

Administration
Administer as a single subcutaneous injection in the neck at 6 mg/kg body weight (2 mL per 110 lb). If the total dose exceeds 10 mL, divide the dose so that no more than 10 mL is given per injection site. 35 day slaughter withdrawal.

*This product requires a prescription from your veterinarian. They can submit it in a few different ways:

Fax a prescription form to 515-573-5331

- Call 515-573-3705 to give verbal authorization

- Send a prescription to orders@jrgsupply.com

- Or provide us with your veterinarian's contact information and we will reach out to them for you!