By increasing milk production efficiency,* Rumensin®
(Monensin, USP) adds value throughout lactation

Rumensin helps dairy producers provide nutritious milk more efficiently. Rumensin’s ability to help cows get more energy from every pound of feed provides flexibility when formulating rations. Dairy producers can customize the herd’s ration and get more milk from the same feed or the same milk from less feed. Rumensin provides value throughout the lactation cycle:

  • During transition and early lactation
    • More energy from every pound of feed
    • No change in dry matter intake (DMI) while cows are in negative energy balance
  • Mid-lactation and late lactation
    • More milk per pound of feed
    • Once energy balance is achieved, DMI may decrease
  • During the dry period
    • More efficient use of feed to maintain body condition

Dairy producers trust Rumensin because it increases milk production efficiency* and provides on average a 5:1 return on investment.1 Producers, veterinarians and nutritionists trust Rumensin because it meets the FDA’s stringent standards for human, animal and environmental safety.

For information on starting a herd, click Introducing Rumensin into Feeding Programs for Dairy Cows.

Safely and effectively produce more milk per pound of feed

Because feedstuffs and management goals are unique to each dairy, it’s important to work with your nutritional advisor to plan Rumensin’s introduction into cow rations and the optimal feeding level for your herd. Nutrition experts can help translate the sound science behind Rumensin into real-world results for you. Common benefits of Rumensin include:

  • 5:1 average return on your investment
  • More milk per pound of feed (pennies per head per day)1
  • Increased milk-production efficiency* throughout lactation and the dry period
  • Meets the U.S. FDA’s stringent standards for effectiveness and animal, environmental, and human-food safety

Download and read Optimizing Response for more information.

Rumensin is approved for use in dairy cows in more than 20 countries around the world. Extensive research associated with these approvals shows that the natural wholesomeness and quality of milk from Rumensin-fed cows are maintained throughout lactation. In addition, the FDA has determined that both milk and meat from cows fed Rumensin are safe for human consumption. 

Important safety information

The label contains complete use information, including cautions and warnings. Always read, understand and follow the label and use directions. Consumption by unapproved species or feeding undiluted may be toxic or fatal. Do not feed to veal calves.

Dosage/Use Levels

Dairy cows

For increased milk production efficiency (production of marketable solids-corrected milk per unit of feed intake).

Feeding Directions

Total Mixed Rations (“complete feed”): Feed continuously to dry and lactating dairy cows a total mixed ration (“complete feed”) containing 11 to 22 g/ton monensin on a 100% dry matter basis.

Component Feeding Systems (including top dress): Feed continuously to dry and lactating cows a Type C Medicated Feed containing 11 to 400 g/ton monensin. The Type C Medicated Feed must be fed in a minimum of 1 pound of feed per cow per day to provide 185 to 660 mg/head/day monensin to lactating cows or 115 to 410 mg/head/day monensin to dry cows. This provides cows with similar amounts of monensin they would receive by consuming total mixed rations containing 11 to 22 g/ton monensin on a 100% dry matter basis.

1. Elanco Animal Health, Data on File, Rumensin Improves Milk Production Efficiency.

* Production of marketable solids-corrected milk per unit of feed intake.