Calves (2 male and 2 female) were administered four intravenous injections of flunixin meglumine in sequential doses of 6.6, 13.2, 26.4 and 52.8 mg/kg (25 times the recommended dose) every other day on a rising dose basis. Results were:
In conclusion, flunixin-related changes included blood in the urine and feces following the 26.4 and 52.8 mg/kg doses and seizures and one mortality after the 52.8 mg/kg dose. In the three remaining animals, all parameters returned to normal during the 14-day post-dose observation period except for one animal positive for fecal occult blood and another positive for urine blood at 14 days.