Treat BRD in a single injection.


Single injection antibiotic for the treatment of BRD


Forcyl® is a sterile, ready-to-use antimicrobial solution of marbofloxacin for injection.


Forcyl: an effective treatment for BRD


  • In the Fall of 2018, two studies were performed in southern Alberta on auction derived fall placed calves at high risk of developing BRD.
  • These calves were an average weight of 550 to 600 lbs at placement and monitored for 60 days on feed.
  • In both studies, Forcyl® was compared to enrofloxacin (100 mg/mL) as a treatment for first incidence of BRD after tulathromycin on arrival.
  • Results are summarized below. A more complete trial summary is available upon request.



Forcyl: a logical treatment


  • One of the shortest meat withdrawal times in the market for a single shot treatment (Meat WDT: 7days).



Forcyl: a responsible treatment


  • Suitable for targeted treatment of sick animals.
  • Single treatment for convenience.
  • Short exposure time to the antibiotic.
  • Rapid absorption and a high Cmax
  • Extended post-antibiotic effect.
  • Optimized dosage in order to minimize the risk of development of antibiotic resistance.



Ask your veterinarian if Forcyl is indicated for your herd.

Description of Forcyl

Forcyl is indicated for the individual treatment of bovine respiratory disease (BRD) associated with susceptible strains of Mannheimia hæmolytica and Pasteurella multocida in affected cattle.


Therapeutic classification

Marbofloxacin is a synthetic third-generation fluoroquinolone and is a bactericidal antimicrobial which acts by inhibiting bacterial DNA gyrase leading to cell death. Marbofloxacin has a broad-spectrum of in vitro activity against Gram-positive and Gram-negative bacteria.

Ingredients of Forcyl

Each mL of Forcyl® contains:

Active Ingredient: 160 mg of marbofloxacin.
Preservative: 15 mg of benzyl alcohol.
Excipients: gluocono-delta-lactone and water for injection.

Directions for Use of Forcyl

The recommended dosage is 10 mg/kg body weight (10 mL/160 kg body weight) in a single intramuscular injection. If the volume to be injected intra-muscularly is greater than 20 mL, it should be divided between two or more injection sites.

Access the Compendium

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Safety Data Sheets

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