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How long do side effects last from penicillin g benzathine a shot?

4 doctors weighed in
Dr. Faryal Ghaffar
Pediatrics
3 doctors agree

In brief: Pencillin

Benzathine penicillin has duration of activity for 2-4 weeks after intramuscular route.
Adverse events from an antibiotics may occur days/weeks after the antibiotic is discontinued therefore if side effect occurs after benzathin penicillin it may occur while the patient is on it or after it is discontinued and may last longer than duration of activity.

In brief: Pencillin

Benzathine penicillin has duration of activity for 2-4 weeks after intramuscular route.
Adverse events from an antibiotics may occur days/weeks after the antibiotic is discontinued therefore if side effect occurs after benzathin penicillin it may occur while the patient is on it or after it is discontinued and may last longer than duration of activity.
Dr. Faryal Ghaffar
Dr. Faryal Ghaffar
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