How Long Do Antibiotic Shots Stay In Your System?
How Long Do Antibiotic Shots Stay In Your System? Penicillin will be out of your system after your last dose in about 7.7 hours. Penicillin has an elimination half-life of approximately 1.4 hours or less. How long does 1 shot of Rocephin stay in your system? Over a 0.15 to 3 gm dose range in