The short answer
Aluminum hydroxide is an antacid, and oral cefuroxime axetil labeling advises taking the antibiotic at least one hour before or two hours after a short-acting antacid. The size of any effect from a particular aluminum hydroxide product is uncertain.
What this answer covers
Oral cefuroxime axetil tablets with oral aluminum hydroxide antacid preparations. No transfer to injected cefuroxime sodium or unrelated aluminum compounds.
- Supplement or preparation
- Aluminum hydroxide
- Medication ingredient
- cefuroxime
Why could an antacid matter?
Cefuroxime axetil is an oral prodrug. Its label warns that reducing stomach acidity can lower the amount of active antibiotic reaching the circulation. Aluminum hydroxide is an acid-neutralizing antacid, so applying that instruction is based on its intended action.
What interval does the label specify?
Take oral cefuroxime axetil at least one hour before aluminum hydroxide, or at least two hours after it, when used as a short-acting antacid. This is a scheduling precaution, not a reason to omit prescribed antibiotic doses. Confirm the plan if the antacid has several active ingredients.
What does the contrary study mean?
In seven dialysis patients, a phosphate binder did not measurably change exposure after a one-gram cefuroxime-axetil dose. The abstract does not disclose the binder dose or preparation, although aluminum hydroxide is indexed. That limits direct comparison and prevents assuming the same result for a specific over-the-counter suspension.
How much certainty is justified?
The label supports spacing, but the inspected clinical evidence does not show a uniform absorption loss or an infection-failure rate for aluminum hydroxide. The claim is therefore conditional on the oral prodrug and antacid use. No absorption-based interval is established here for injected cefuroxime.
Evidence and practical considerations
Absorption & effectiveness
Aluminum hydroxide is an antacid, and oral cefuroxime axetil labeling advises taking the antibiotic at least one hour before or two hours after a short-acting antacid. The size of any effect from a particular aluminum hydroxide product is uncertain.
- Exact scope
- Oral cefuroxime axetil tablets with oral aluminum hydroxide antacid preparations. No transfer to injected cefuroxime sodium or unrelated aluminum compounds. with oral cefuroxime axetil, converted to cefuroxime; not injected cefuroxime sodium
- Medication form and route
- oral
- Timing or duration
- During co-use; study-specific durations are retained in the source summaries. No universal duration or dose-response inferred.
What remains uncertain
- Antacid-class label applied to a verified antacid ingredient. Isolated aluminum hydroxide effect size is not established; contrary CAPD binder study is preparation-limited.
Factors that may matter: exact supplement preparation and dose; oral versus nonoral medication route; other formula ingredients; gastric-acidity effect and concurrent treatment.
Read the supporting source summaries
Source 1: regulatory product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: People receiving oral cefuroxime axetil tablets.
Reduced stomach acidity can lower oral bioavailability. Administer antibiotic at least one hour before or two hours after short-acting antacids. Label also warns about C. difficile-associated diarrhea.
How this applies: RxCUI 2194 active cefuroxime is reached after oral axetil conversion. Gastric-pH effect is restricted to oral axetil, not injected cefuroxime sodium. Exact package scope: Oral cefuroxime axetil tablets with oral aluminum hydroxide antacid preparations. No transfer to injected cefuroxime sodium or unrelated aluminum compounds.
Antacid class precaution does not quantify the effect of every mineral salt; tablets and suspension are not interchangeable milligram for milligram.
Source 2: government drug-identity reference
cancer.gov · Source check Sep 10, 2026
Population: Users of oral aluminum hydroxide and magnesium hydroxide suspension.
Identifies these hydroxides as acid-neutralizing antacid ingredients.
How this applies: Supports applying an antacid-class precaution to these acid-neutralizing preparations, not to all aluminum or magnesium exposures. Exact package scope: Oral cefuroxime axetil tablets with oral aluminum hydroxide antacid preparations. No transfer to injected cefuroxime sodium or unrelated aluminum compounds.
No clinical cefuroxime data or isolated ingredient effect size.
Source 3: human crossover pharmacokinetic study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Seven continuous ambulatory peritoneal dialysis patients without recent peritonitis.
Median peak levels were 22.7 versus 23.2 mg/L and exposure 364 versus 368 mg h/L; no difference in bioavailability was detected.
How this applies: Contrary evidence for an oral cefuroxime/binder interaction. Not proof that every aluminum antacid or regimen is free of effect. Exact package scope: Oral cefuroxime axetil tablets with oral aluminum hydroxide antacid preparations. No transfer to injected cefuroxime sodium or unrelated aluminum compounds.
Abstract does not identify binder formulation or dose; indexing includes aluminum hydroxide but does not resolve the regimen. Small special population with prolonged cefuroxime half-life.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Narrows reduced-absorption wording to the labeled oral antacid precaution and records the negative study rather than presenting uniformly positive evidence. | |
| Research summary published |
Article revision: 893a2882b93b2df4
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
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Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.