Livestock · Bos taurus · typical adult weight 250.00–900.00 kg
Virginiamycin (Feed Additive) is dosed at 15–30 mg/kg feed PO continuous in feed in cattle, per US FDA. V-Max (virginiamycin) Type A Medicated Article, NADA 140-998, Phibro. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=3674cacd-0d6f-4483-ab2c-2b53e5f65ae9 - cattle fed in confinement for slaughter; 13.5-16.0 g/ton feed (85-240 mg/hd/day) to reduce liver abscesses; VFD drug. — 21 CFR § 558.635 (Virginiamycin), conditions of use for Cattle (Beef/Dairy): 14.881-17.637 ppm (converted from grams per short ton; 1 g/ton = 1.10231 ppm). Related tolerances: 21 CFR § 556.750. Retrieved from the eCFR API, snapshot 2026-01-01. https://www.ecfr.gov/current/title-21/section-558.635. Virginiamycin (Feed Additive) is used in cattle for Growth promotion, feed efficiency, acidosis prevention. Routes documented in cattle: PO. A typical adult cattle weighs 250.00–900.00 kg. ExoticRx lists 1 cited dose rule for Virginiamycin (Feed Additive) in cattle, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: V-Max, Stafac
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| PO | 15–30 mg/kg feed | continuous in feed | Growth promotion, feed efficiency, acidosis prevention | Strong | US FDA. V-Max (virginiamycin) Type A Medicated Article, NADA 140-998, Phibro. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=3674cacd-0d6f-4483-ab2c-2b53e5f65ae9 - cattle fed in confinement for slaughter; 13.5-16.0 g/ton feed (85-240 mg/hd/day) to reduce liver abscesses; VFD drug. — 21 CFR § 558.635 (Virginiamycin), conditions of use for Cattle (Beef/Dairy): 14.881-17.637 ppm (converted from grams per short ton; 1 g/ton = 1.10231 ppm). Related tolerances: 21 CFR § 556.750. Retrieved from the eCFR API, snapshot 2026-01-01. https://www.ecfr.gov/current/title-21/section-558.635 |
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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.
Streptogramin antibiotic that inhibits bacterial protein synthesis. Consists of two synergistic components (virginiamycin M1 and S1) that bind to the 50S ribosomal subunit.
Feed additive use only. Used for growth promotion and prevention of liver abscesses in feedlot cattle. Cross-resistance with quinupristin-dalfopristin has raised public health concerns.
Species-specific contraindications and adverse-reaction reports for cattle may differ from canine / feline reference data — consult the primary citations listed with each rule.
Virginiamycin (Feed Additive) dose range in cattle, with cited source references: PO 15–30 mg/kg feed continuous in feed. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Virginiamycin (Feed Additive) in cattle: PO.
Virginiamycin (Feed Additive) is indicated in cattle for: Growth promotion, feed efficiency, acidosis prevention.
These are general warnings for Virginiamycin (Feed Additive) across species; consult the cattle dosing table above for species-specific guidance. Feed additive use only. Used for growth promotion and prevention of liver abscesses in feedlot cattle. Cross-resistance with quinupristin-dalfopristin has raised public health concerns.
Why a species-specific page? Virginiamycin (Feed Additive) 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.