**Indication:**
Alginic acid, aluminium hydroxide, and magnesium carbonate are commonly used in combination to treat symptoms associated with excess stomach acid, such as heartburn, acid indigestion, and upset stomach. This medication is also used to manage conditions like stomach ulcers, gastroesophageal reflux disease (GERD), and other conditions caused by excessive stomach acid.

**Dosage:**
The dosage of alginic acid, aluminium hydroxide, and magnesium carbonate may vary based on individual circumstances and the specific formulation of the medication. Here are some general dosage guidelines based on the provided search results:

- The recommended dosage for acid neutralizing capability per dose for gastroesophageal reflux disease is between 80 to 160 mEq, with higher doses possibly required in some patients. Each dose should be followed by 120 mL of water [[1]](https://www.drugs.com/dosage/alginic-acid-aluminum-hydroxide-magnesium-carbonate.html).
- For adults, the typical dosage of the combination medication may include aluminium hydroxide 160 mg and magnesium carbonate 105 mg, taken orally up to 4 times a day after meals and at bedtime as needed or as directed [[2]](https://www.drugs.com/dosage/aluminum-hydroxide-magnesium-carbonate.html).
- It is important to follow the specific dosing instructions provided by your healthcare provider or the product labeling. Always consult your healthcare provider to ensure the information applies to your personal circumstances.

It's crucial to adhere to the prescribed dosage and usage instructions provided by your healthcare professional. If you have any concerns or questions about the appropriate dosage of alginic acid, aluminium hydroxide, and magnesium carbonate, it is best to consult with your doctor or pharmacist.

Please note that the information provided here is a general overview and should not replace the specific instructions provided by your healthcare professional.