Trusted By Every Generation

Keeping a strong herd and a successful operation is what legacies are made of. And for 50 years, beef producers have trusted Rumensin® to deliver consistent results. For five decades, beef producers have built their legacies on strong herds and successful operations, consistently trusting Rumensin's demonstrated results from over 400 research studies and its dependable versatility.

^{*For a 1300lb cow over a 120-day winter feeding period, Rumensin's 8% reduction in forage intake saves 250 lbs of forage, equating to a $25 financial value per head.}

^{Cost Calculations (Assumptions): Estimated Cost: ~200 per 50lb bag (approx. 4.00 per lb of Rumensin 90). Note: Market prices vary by region and distributor.}

Black and white photograph of beef cattle in a feedlot, featuring a close-up of a large black bull. Represents Elanco's commitment to livestock health and productivity.

Feedyard

Improve feed efficiency and prevent and control coccidiosis in feedlot cattle

Black and white image of two cattle producers on horseback herding a group of cows across a field, reflecting traditional ranching heritage and livestock management.

Stocker

Increase daily average gain as well as prevent and control coccidiosis in stocker cattle.

Cow-Calf

Maintain a cow’s body weight on less feed for improved feed efficiency, while preventing and controlling coccidiosis.

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The label contains complete use information, including cautions and warnings. Always read, understand and follow the label and use directions.

CAUTION: Consumption by unapproved species or feeding undiluted may be toxic or fatal. Do not feed to veal calves.

Rumensin, Elanco and the diagonal bar logo are trademarks of Elanco or its affiliates.

Growing beef steers and heifers fed in confinement for slaughter:
For improved feed efficiency: Feed 5 to 40 g/ton of monensin (90% DM basis) continuously in a complete feed to provide 50 to 480 mg/hd/day.
For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii: Feed 10 to 40 g/ton of monensin (90% DM basis) continuously to provide 0.14 to 0.42 mg/lb of body weight/day, depending upon severity of challenge, up to a maximum of 480 mg/hd/day.

Growing beef steers and heifers on pasture (stocker, feeder, and slaughter) or in a dry lot, and replacement beef and dairy heifers:
For increased rate of weight gain: Feed 50 to 200 mg/hd/day in at least 1.0 lb of Type C Medicated Feed. Or, after the 5th day, feed 400 mg/hd/day every other day in 2.0 lbs of Type C Medicated Feed. The Type C Medicated Feed must contain 15 to 400 g/ton of monensin (90% DM basis). Do not self feed.
For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii: Feed at a rate to provide 0.14 to 0.42 mg/lb of body weight/day, depending upon severity of challenge, up to a maximum of 200 mg/hd/day. The Type C Medicated Feed must contain 15 to 400 g/ton of monensin (90% DM basis).
Type C free-choice medicated feeds: All Type C free-choice medicated feeds containing Rumensin must be manufactured according to an FDA-approved formula/specification. When using a formula/specification published in the Code of Federal Regulations (CFR), a Medicated Feed Mill license is not required. Use of Rumensin in a proprietary formula/specification not published in the CFR requires prior FDA approval and a Medicated Feed Mill License.

Beef cows:
For improved feed efficiency when receiving supplemental feed: Feed continuously at a rate of 50 to 200 mg/hd/day. Cows on pasture or in dry lot must receive a minimum of 1.0 lb of Type C Medicated Feed per head per day. Do not self feed.
For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii: Feed at a rate of 0.14 to 0.42 mg/lb of body weight/day, depending upon severity of challenge, up to a maximum of 200 mg/hd/day.

For calves (excluding veal calves):

For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii: Feed at a rate of 0.14 to 1.00 mg/lb of body weight/day, depending upon severity of challenge, up to a maximum of 200 mg of monensin/hd/day. The monensin concentration in Type C medicated feed must be between 10 and 200 g/ton.