Monovet® 90 Two Choices, One Easy Decision

(Monensin Type A Medicated Article)

Monovet® 90

Product Information

Monovet® 90 is a monensin product that improves feed efficiency, increases milk production and prevents and controls coccidiosis in cattle.

  • Improved feed efficiency in feedlot cattle.
  • Increased average daily gain. Monovet 90 (Monensin) helps cattle on high roughage rations, such as pasture or silage, get more energy from their ration and increase their rate of gain.
  • Increased weight gain among beef and dairy replacement heifers. Monovet 90 helps heifers reach breeding weight sooner, which offers heifers the potential to achieve production sooner along with increased potential to continue to breed earlier throughout their lifetimes. 
  • Improved energy metabolism among mature reproducing beef cows and lactating dairy cows. Helping cows get the most energy from their feed contributes to feed efficiency and can help reduce overall supplemental feed needs and decrease input costs. 
  • Effective prevention and control of coccidiosis among confined cattle, resulting in healthier, better performing cattle.
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Cattle fed in confinement for slaughter: 

  1. For improved feed efficiency. 
  2. For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii.

Dairy Cows: 

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

Growing cattle on pasture or in dry lot (stocker and feeder and dairy and beef replacement heifers): 

  1. For increased rate of weight gain. 
  2. For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii

Mature Reproducing Beef Cows: 

  1. For improved feed efficiency when receiving supplemental feed. 
  2. For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii


  1. For the prevention of coccidiosis caused by Eimeria crandallis, Eimeria christenseni, and Eimeria ninakohlyakimovae in goats maintained in confinement. 

Calves (excluding veal calves): 

  1. For the prevention and control of coccidiosis due to Eimeria bovis and Eimeria zuernii.


CAUTION: Do not allow horses or other equines access to feeds containing monensin. Ingestion of monensin by horses has been fatal. Monensin medicated cattle and goat feeds are safe for use in cattle and goats only. Consumption by unapproved species may result in toxic reactions. Feeding undiluted or mixing errors resulting in high concentrations of monensin has been fatal to cattle and could be fatal to goats. Must be thoroughly mixed in feeds before use. Do not exceed the levels of monensin recommended in the feeding directions as reduced average daily gains may result. Do not feed to lactating goats. If feed refusals containing monensin are fed to other groups of cattle, the concentration of monensin in the refusals and amount of refusals fed should be taken into consideration to prevent monensin overdosing. 


  • Reduced voluntary feed intake in dairy cows fed monensin. This reduction increases with higher doses of monensin fed. Rule out monensin as the cause of reduced feed intake before attributing to other causes such as illness, feed management, or the environment. 
  • Reduced milk fat percentage in dairy cows fed monensin. This reduction increases with higher doses of monensin fed. 
  • Increased incidence and treatment of cystic ovaries and metritis in dairy cows fed monensin. 
  • Reduced conception rates, increased services per animal, and extended days open and corresponding calving intervals in dairy cows fed monensin. 

Have a comprehensive and ongoing nutritional, reproductive and herd health program in place when feeding monensin to dairy cows.

WARNING: A withdrawal time has not been established for pre-ruminating calves. Do not use in calves to be processed for veal. When mixing and handling Monovet 90, use protective clothing, impervious gloves and a dust mask. Operators should wash thoroughly with soap and water after handling. If accidental eye contact occurs, immediately rinse with water.


Restricted Drug (California) - Use only as directed. 

See label for full product directions. 

Active Ingredient or Composition