Merck Orbenin-DC (Benzathine Cloxacillin), Dry Cow Intramammary Infusion, 7.5gm (12 single doses) | On Sale | EntirelyPets Rx
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Merck Orbenin-DC (Benzathine Cloxacillin), Dry Cow Intramammary Infusion, 7.5gm (12 single doses)

Item# IWM020672
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Recurring Saings in EprxAUTOSHIP & SAVE[Details]
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ORBENIN is used for treating non-lactating cows for mastitis caused by Staphylococcus aureus and Streptococcus agalactiae.

Key Benefits

  • Broad-spectrum dry-cow mastitis treatment
  • The shortest required dry period1
  • Tank ready, following a 28-day dry period


At the last milking of lactation, milk the cow out normally. Clean and disinfect the teats with alcohol swabs provided in the carton, and infuse 1 syringe of Orbenin-DC, which has been warmed to room temperature, into each quarter. Do not milk out. The cow may be milked as usual when she calves.

The extent of subclinical and latent mastitis in a herd is frequently greater than suspected. In untreated herds a significant buildup of subclinical mastitis may occur during the dry period, which results in clinical severity after a few lactations. The adverse influence of subclinical mastitis on milk yield, the risk of cross-infection, and the chance of clinical mastitis flare-up make it necessary to treat the matter as a herd problem. Clinical studies have proven the value of treating all the cows in heavily infected herds as they are dried off. When the herd infection has been reduced, it may be desirable to be more selective in treating infected quarters.


Because it is a derivative of 6-amino-penicillanic acid, Orbenin-DC has the potential for producing allergic reactions. Such reactions are rare; however, should they occur, the subject should be treated with the usual agents (antihistamines, pressor amines).


For use in dry cows only. Do not use within 4 weeks (28 days) of calving. Treated animals must not be slaughtered for food purposes within 4 weeks (28 days) of treatment.


Because cloxacillin benzathine is relatively insoluble, Orbenin-DC’s activity will be prolonged. Therefore, Orbenin-DC should not be used for the occasional cow which may have a dry period of less than 4 weeks. This precaution will avoid residues in the milk following removal of the colostrum.


Federal law restricts this drug to use by or on the order of a licensed veterinarian.

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