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A member asked:
How long is a shot of penicillin good?
A doctor has provided 1 answer
Penicllin: It depends upon the kind of penicillin. Regular penicillin (given iv) has a half life of only 1-2 hours but intramuscular penicillin types last longer. Procaine penicillin for 1-2 days and benzathine penicillin for about 3 weeks.
Answered 9/28/2016
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