Aluminium hydroxide AlH₃O₃
Also known as: Aluminum hydroxide

Active ingredient description

Aluminium hydroxide is a slow-acting antacid. It is used to provide symptomatic relief in gastric hyperacidity. In addition, the antipeptic and demulcent activity of aluminium hydroxide helps to protect inflamed gastric mucosa against further irritation by gastric secretions.

Medicine classification

This medicinal substance has been classified in the anatomical therapeutic chemical (ATC) classification according to its main therapeutic use as follows:

ATC code
Group title
Aluminium hydroxide
A Alimentary tract and metabolism → A02 Drugs for acid related disorders → A02A Antacids → A02AB Aluminium compounds
Discover more medicines within A02AB01

Product monographs

Competent medicine agencies globally have authorized commercialization of this active ingredient according to these medication package inserts (MPIs):

Information Source
Document Type
Medicines & Healthcare Products Regulatory Agency (GB)
Summary of Product Characteristics (SPC)

Structural formula

Graphic representation of the active ingredient's molecular structure

Chemical formula: AlH₃O₃
Molecular mass: 78.004 g/mol

External identifiers

CAS Substance: 12040-59-4
CAS Substance: 21645-51-2
DrugBank Drug: DB06723
PubChem Compound: 10176082
RxNorm Ingredient: 612
SNOMED-CT Concept: 273944007
Aluminium hydroxide (substance)
UNII Identifier: 5QB0T2IUN0


Aluminium hydroxide is an active ingredient of these brands:

Austria (AT)

  • (combination) MAALOX as ALUMINUM OXIDE

Brazil (BR)

Canada (CA)

  • (combination) DIOVOL PLUS as Dried aluminum hydroxide gel

Cyprus (CY)

Ecuador (EC)

Estonia (EE)

  • (combination) MAALOX as ALUMINUM OXIDE

France (FR)

Hong Kong (HK)

Ireland (IE)

Japan (JP)

Lithuania (LT)

Malta (MT)

Mexico (MX)

Netherlands (NL)

New Zealand (NZ)

Nigeria (NG)

Poland (PL)

Romania (RO)

Singapore (SG)

South Africa (ZA)

Tunisia (TN)

Turkey (TR)

  • (combination) KURSEPT
  • (combination) SIMECO as co-dried Aluminium hydroxide and Magnesium carbonate

United Kingdom (UK)

While we strive to include the brand names of medicines across all countries, our index remains incomplete. Therefore, it is possible that this medicine may also be marketed under different names in other countries.

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