Drug interactions
Chloramphenicol + Penicillin g
Severity: Minor
Chloramphenicol and Penicillin g: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Chloramphenicol is bacteriostatic and may theoretically antagonize the bactericidal action of penicillin G against actively dividing bacteria. Clinical significance is uncertain, though outcome concerns have been raised in severe infections such as meningitis.
What this interaction means in plain words
Chloramphenicol and Penicillin g have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Chloramphenicol belongs to Anti Bacterial; Penicillin g belongs to Anti Bacterial.
Why it happens
Bacteriostatic inhibition of protein synthesis may reduce the bactericidal effect of beta-lactams that need active cell growth.
What to do
Avoid combining in serious infections such as meningitis unless required by susceptibility; if used, give the bactericidal agent first.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Penicillin g
- Amifampridine + Penicillin g Moderate
- Amiloride + Penicillin g Moderate
- Bcg vaccine live + Penicillin g Moderate
- Cholera vaccine + Penicillin g Moderate
- Colestipol + Penicillin g Moderate
- Deflazacort + Penicillin g Moderate
Other interactions of Chloramphenicol
Frequently asked questions
Can I take Chloramphenicol with Penicillin g?
MediHelp rates the interaction as minor. Chloramphenicol and Penicillin g have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Chloramphenicol is bacteriostatic and may theoretically antagonize the bactericidal action of penicillin G against actively dividing bacteria. Clinical significance is uncertain, though outcome concerns have been raised in severe infections such as meningitis.
How serious is the interaction between Chloramphenicol and Penicillin g?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining in serious infections such as meningitis unless required by susceptibility; if used, give the bactericidal agent first.
What other medicines interact with Penicillin g?
MediHelp also lists interactions of Penicillin g with, for example, Amifampridine, Amiloride, Bcg vaccine live. The full list is on the Penicillin g page.
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