Livestock · Bos taurus · typical adult weight 250.00–900.00 kg
Gamithromycin is dosed at 6 mg/kg SC Once in cattle, per ZACTRAN - Gamithromycin Injection, Solution [US Product Label]. Merial, Inc.; 2016. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=4ad34f81-65e1-4858-8928-50af8bcb3db9 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.599 (2026-08-01).. Gamithromycin is used in cattle for Bovine respiratory disease (BRD). Routes documented in cattle: SC. A typical adult cattle weighs 250.00–900.00 kg. ExoticRx lists 1 cited dose rule for Gamithromycin in cattle, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Zactran
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| SC | 6 mg/kg | Once | Single injection | Bovine respiratory disease (BRD) | Strong | ZACTRAN - Gamithromycin Injection, Solution [US Product Label]. Merial, Inc.; 2016. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=4ad34f81-65e1-4858-8928-50af8bcb3db9 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.599 (2026-08-01). |
Need the exact dose for your patient?
These ranges are per kg. Enter your cattle's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Semi-synthetic 15-membered azalide macrolide. Binds 50S ribosomal subunit, inhibiting protein synthesis. Excellent tissue concentration and long half-life.
Primarily cattle/swine. Fatal in horses (colitis). Single injection provides 7+ day coverage. SC injection in neck. Not for companion animal use generally.
Species-specific contraindications and adverse-reaction reports for cattle may differ from canine / feline reference data — consult the primary citations listed with each rule.
Gamithromycin dose range in cattle, with cited source references: SC 6 mg/kg Once. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Gamithromycin in cattle: SC.
Cited course lengths for Gamithromycin in cattle include: Single injection. Duration depends on the indication — match it to the specific dose rule in the table above.
Gamithromycin is indicated in cattle for: Bovine respiratory disease (BRD).
These are general warnings for Gamithromycin across species; consult the cattle dosing table above for species-specific guidance. Primarily cattle/swine. Fatal in horses (colitis). Single injection provides 7+ day coverage. SC injection in neck. Not for companion animal use generally.
Why a species-specific page? Gamithromycin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cattle — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.