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This widely used over-the-counter antacid combination offers quick relief from symptoms like acid reflux, upset stomach, and gas. Let’s take a closer look at what each ingredient does and why this combination is so effective.

What’s in This Antacid Combo?

1. Alumina (Aluminum Hydroxide):

  • excess stomach acid
  • Helps relieve heartburn and acid indigestion
  • Can cause constipation in some people

2. Magnesia (Magnesium Hydroxide):

  • Also neutralizes stomach acid, but acts faster than alumina
  • Has a mild laxative effect, helping to offset alumina’s constipating effect

3. Simethicone:

  • Reduces gas and bloating by helping to break up gas bubbles.
  • Doesn’t reduce acid, but relieves pressure and discomfort
  • Especially helpful if indigestion is accompanied by bloating or gas pains

What This Combo Treats

Common conditions that benefit from this combination include:

  • Heartburn (acid reflux)
  • Indigestion
  • Gas and bloating
  • Stomach upset from acid or gas buildup

Popular Brand Names

This combination is commonly included in many trusted over-the-counter products, including:

  • Maalox Plus
  • Mylanta
  • Gelusil

Side Effects and Safety

Possible Side Effects:

  • Constipation (from alumina)
  • Diarrhea (from magnesia)
  • Rare: Nausea, vomiting, or allergic reactions

Important Warnings:

  • Use with caution if you have kidney disease, as aluminum and magnesium levels can build up
  • Avoid taking within 2 hours of other medications — may affect absorption
  • Check with your doctor if you’re pregnant, breastfeeding, or on a special diet

How to Take It:

  • Usually taken after meals and at bedtime, or as directed on the label
  • Chew tablets well or shake liquid suspensions thoroughly before use.
  • Always follow dosing instructions to avoid overuse

Conclusion

The combination of alumina, magnesia, and simethicone offers well-rounded relief for heartburn, bloating, and upset stomach. It’s fast-acting and generally safe for short-term use, especially when occasional indigestion strikes.

If symptoms persist for more than two weeks or worsen, consult your healthcare provider to rule out more serious conditions.