Drug General Information (ID: DDIMXLP3CY)
  Drug Name Bacampicillin Drug Info Magnesium carbonate Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antibiotics Antacids
  Structure

 Mechanism of Bacampicillin-Magnesium carbonate Interaction (Severity Level: Moderate)
     Altered gastric pH Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Bacampicillin Magnesium carbonate
      Mechanism Gastric pH sensitive Gastric alkalinizer
      Key Mechanism Factor 1
Factor Name Gastric pH
Factor Description The normal pH range of gastric acid is between 1.5 and 3.5 and is highly acidic, consisting mainly of hydrochloric acid. Changes in the pH of the stomach can alter the absorption of drugs.
      Mechanism Description
  • Decreased absorption of Bacampicillin due to altered gastric pH caused by Magnesium carbonate 

Recommended Action
      Management The possibility of a reduced or subtherapeutic response to bacampicillin should be considered during coadministration with antacids, H2-receptor antagonists, proton pump inhibitors, or other agents that can increase gastric pH. Preferably, these agents should be avoided during therapy with bacampicillin, or an alternative antibiotic be prescribed if these medications cannot be discontinued. Patients treated with antacids (or oral medications that contain antacids such as didanosine buffered tablets or pediatric oral solution) may minimize the effects of the interaction with bacampicillin by separating the times of administration by at least 2 hours.

References
1 Honig PK, Gillespie BK "Clinical significance of pharmacokinetic drug interactions with over-the-counter (OTC) drugs." Clin Pharmacokinet 35 (1998): 167-71. [PMID: 9784931]
2 Sommers DK, van Wyk M, Moncrieff J, Schoeman HS "Influence of food and reduced gastric acidity on the bioavailability of bacampicillin and cefuroxime axetil." Br J Clin Pharmacol 18 (1984): 535-9. [PMID: 6091711]