How long after antacids should i take advil?

Recommended Timing Between Antacids and Advil

Take Advil (ibuprofen) at least 2 hours before or after antacids. This spacing reduces interference, as antacids can bind to ibuprofen in the stomach and lower its absorption.[1]

Why Antacids Affect Advil Absorption

Antacids containing aluminum, magnesium, or calcium (like Maalox, Tums, or Rolaids) form insoluble complexes with ibuprofen, trapping it and preventing it from entering the bloodstream effectively. Studies show this can cut ibuprofen's bioavailability by up to 50% if taken together.[2][3]

Which Antacids Cause the Most Issues

• Aluminum/magnesium-based (e.g., Maalox, Mylanta): Strongest interaction—wait full 2 hours.
  
• Calcium carbonate (e.g., Tums): Moderate effect—still space by 1-2 hours.
  
• Sodium bicarbonate (e.g., Alka-Seltzer): Minimal impact, but separate by 1 hour to be safe.[1][4]
  
  

What Happens If You Take Them Together

Ibuprofen levels drop, weakening pain or inflammation relief. Effects peak later or not at all, potentially requiring a higher dose (risking side effects like stomach upset).[2]

Tips for Pain Relief Without Delays

• Take Advil first, wait 2 hours, then antacids if needed for heartburn.
  
• Switch to H2 blockers (e.g., Pepcid) or PPIs (e.g., Prilosec)—they don't bind ibuprofen and can be taken closer together.[4]
  
• For quick relief, use plain ibuprofen liquid or enteric-coated versions, which may tolerate minor antacid overlap better.
  
  

Stomach Protection When Using Both

Ibuprofen irritates the stomach lining, worsened by antacids masking early symptoms. Pair with food or misoprostol if at high GI risk. Long-term combo raises ulcer odds—consult a doctor.[3][5]

Sources
[1]: Drugs.com - Ibuprofen and Antacid Interactions
[2]: PubMed - Effect of Antacids on Ibuprofen Bioavailability
[3]: FDA Label - Advil (Ibuprofen)
[4]: WebMD - Antacid Drug Interactions
[5]: Mayo Clinic - NSAID Stomach Risks