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About 95 percent of the penicillin should be out a system within 10 hours. It may be detectable for up to about 2 days.

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9y ago
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9y ago

The amount of time that penicillin stays in the system of a cow depends on the amount given. The more given the longer it stays.

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8y ago

Only a very small amount of penicillin is excreted into breast milk. Duration data is not available.

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Q: How long does penicillin stay in your system?
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