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Drug Interaction Report

1 potential interaction and/or warning found for the following 2 drugs:

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Interactions between your drugs

Minor

azithromycin penicillin G benzathine

Applies to: Zithromax (azithromycin), Bicillin L-A (penicillin g benzathine)

Although some in vitro data indicate synergism between macrolide antibiotics and penicillins, other in vitro data indicate antagonism. When these drugs are given together, neither has predictable therapeutic efficacy. Data are available for erythromycin, although theoretically this interaction could occur with any macrolide. Except for monitoring of the effectiveness of antibiotic therapy, no special precautions appear to be necessary.

References

  1. Strom J. Penicillin and erythromycin singly and in combination in scarlatina therapy and the interference between them. Antibiot Chemother. 1961;11:694-7.
  2. Cohn JR, Jungkind DL, Baker JS. In vitro antagonism by erythromycin of the bactericidal action of antimicrobial agents against common respiratory pathogens. Antimicrob Agents Chemother. 1980;18:872-6.
  3. Penn RL, Ward TT, Steigbigel RT. Effects of erythromycin in combination with penicillin, ampicillin, or gentamicin on the growth of listeria monocytogenes. Antimicrob Agents Chemother. 1982;22:289-94.

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Drug and food interactions

No alcohol/food interactions were found with the drugs in your list. However, this does not necessarily mean no food interactions exist. Always consult your healthcare provider.

Therapeutic duplication warnings

No duplication warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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