ExoticRx · exoticrx.com/drugs/virginiamycin
US brand names:Stafac
Streptogramin A+B combination that binds 50S ribosomal subunit, inhibiting peptidyl transferase and protein synthesis. Bactericidal when combined.
Primarily livestock growth promoter (banned in EU). Not for companion animals. VFD required. Concern for streptogramin resistance transfer.
Species references:All Cat (Domestic) drugsAll Dog (Domestic) drugs
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
A dog/cat sample is shown here. Cited dosing for all 2 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Dog (Domestic) | PO | Livestock growth promoter | N/A | Extrapolated | Plumb's Veterinary Drug Handbook, 9th Ed |
| Cat (Domestic) | PO | Livestock use only | N/A | Extrapolated | Plumb's Veterinary Drug Handbook, 9th Ed |
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