Heifermax 500 Recall
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Questions & Answers
Side Effects & Adverse Reactions
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FDA Safety Alerts
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There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
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HEIFERMAX® 500 should be thoroughly mixed in liquid Type C medicated feed which must be fed at 0.5 to 2.0 pounds per head daily to provide 0.25 to 0.5 mg of melengestrol acetate per head per day. Average daily intakes approximating the middle of this range provide the most optimal and economical improvements in rate of weight gain and feed utilization. Constant daily intakes of 0.35 to 0.50 mg per head per day give a high degree of estrus suppression. Levels of 0.25 to 0.35 mg provide a lower but still effective degree of estrus suppression.
HEIFERMAX® 500 should be thoroughly mixed in the supplement to provide 0.5 mg of melengestrol acetate per head per day.
Withdrawal periods of three to five days or more should be avoided to prevent the possibility that the heifers may come into estrus (heat) at loading time.
Do not exceed 24 days of feeding of melengestrol acetate to heifers intended for breeding. A reduced conception rate can be expected if heifers are bred at estruses observed within 1 to 12 days after withdrawal of melengestrol acetate, whereas heifers bred at subsequent observed estruses are expected to have normal conception rates.
Not effective in steers or spayed heifers.
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