Hidróxido de alumínio
Revisado por Sid DajaniÚltima atualização por Michael Stewart, MRPharmSÚltima atualização 9 Jun 2024
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Nota do autor clínico Michael Stewart 24/5/2021: Alu-Cap® capsules were discontinued in the UK in May 2019. At the time of review there are no branded or generic products solely containing aluminium hydroxide in the UK. Aluminium hydroxide may be available as a special order and is included as an ingredient in some antacid remedies. It may also still be available in other countries. This medicine leaflet is based on medical information accessed in the UK at the time of writing and is left here for reference purposes. Please also refer to the manufacturer's information supplied with your medicine.
Aluminium hydroxide is taken for indigestion. It is also taken to control high phosphate levels in people with kidney disease.
Do not take the capsules at the same time as other medicines - leave two hours between taking aluminium hydroxide capsules and any other medicines.
O efeito colateral mais comum é a constipação.
Em resumo
Aluminium hydroxide is a medicine used to treat indigestion or to control high phosphate levels.
For indigestion, take one capsule four times a day with meals and at bedtime.
If taking for high phosphate levels, your doctor will advise on the dose.
It is best to leave two hours between taking aluminium hydroxide and other medicines.
Constipation is a common side-effect; increase fibre and water if affected.
See your doctor if indigestion symptoms like difficulty swallowing or weight loss occur.
About aluminium hydroxide
Tipo de medicamento | Um antiácido |
Usado para | As an antacid for indigestion; to control high phosphate levels in people with kidney disease |
Também chamado de | Alu-Cap® (discontinued) |
Disponível como | cápsulas |
Aluminium hydroxide is an antacid, which means that it neutralises excess stomach acid associated with indigestão. It also helps to protect the lining of your stomach from acid irritation.
Aluminium hydroxide can also reduce the amount of phosphate which your body absorbs from the food you eat. It combines with phosphate in your stomach, and this is then removed instead of being absorbed. Although aluminium hydroxide is sometimes prescribed for this purpose in people with certain kidney diseases, other medicines are usually used in preference to it.
Before taking aluminium hydroxide
To make sure this is the right treatment for you, before you take aluminium hydroxide capsules it is important that your doctor or pharmacist knows:
Se você está grávida ou amamentando.
If you have any problems with the way your liver works or any problems with the way your kidneys work.
If you have been told you have low levels of phosphate in your blood.
Se você já teve uma reação alérgica a um medicamento.
Se você estiver tomando outros medicamentos. Isso inclui quaisquer medicamentos que você esteja tomando e que estejam disponíveis para compra sem receita médica, bem como medicamentos fitoterápicos e complementares.
How to take aluminium hydroxide
Before you start taking aluminium hydroxide, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about aluminium hydroxide and will provide you with a full list of the side-effects which you may experience from taking it.
For indigestion in adults, take one capsule four times a day with meals and one at bedtime. The capsules are not suitable for children to take as an antacid. Antacids are best taken when symptoms are likely to occur.
If you are taking aluminium hydroxide to reduce the amount of phosphate in your body, your doctor will tell you how many capsules to take each day. You could be asked to take between 4-20 capsules a day. Take the capsules spaced out throughout the day with your meals.
Aluminium hydroxide can interfere with other medicines taken at the same time and can prevent them from being absorbed properly. It is best if you leave two hours between taking aluminium hydroxide and any other medicines.
Obtendo o máximo do seu tratamento
If you are taking aluminium hydroxide for indigestion
There are some foods that may make your symptoms worse. Foods and drinks that have been suspected of this include peppermint, tomatoes, chocolate, spicy foods, hot drinks, coffee and alcoholic drinks. If it seems that a food is aggravating your symptoms, try avoiding it for a while to see if your symptoms improve. Also, try avoiding eating large meals, as these can make your symptoms worse too.
If at any time you develop any of the following symptoms, speak with your doctor as soon as possible: difficulty swallowing, loss of blood, weight loss or if you are being sick. These are symptoms sometimes associated with indigestion that your doctor will want to investigate further.
If you have been prescribed aluminium hydroxide for the management of kidney disease
Try to keep your regular appointment with your doctor so that your progress can be monitored. Your doctor is likely to want you to have blood tests from time to time.
Can aluminium hydroxide cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common one associated with aluminium hydroxide. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common aluminium hydroxide side-effects | O que posso fazer se passar por isso? |
Constipação | Eat plenty of fibre such as fruit, vegetables and bran and drink plenty of water each day. If you are taking the capsules as an antacid, speak with your pharmacist for advice on a more suitable preparation |
Se você sentir quaisquer outros sintomas que acha que podem ser devido às cápsulas, fale com seu médico ou farmacêutico para mais orientações.
How to store aluminium hydroxide
Mantenha todos os medicamentos fora do alcance e da vista das crianças.
Armazene em local fresco e seco, longe de calor e luz diretos.
Informações importantes sobre todos os medicamentos
Informações importantes sobre todos os medicamentos
Nunca tome mais do que a dose prescrita. Se suspeitar que você ou outra pessoa possa ter tomado uma overdose deste medicamento, vá ao departamento de acidentes e emergências do hospital local. Leve o recipiente com você, mesmo que esteja vazio.
Este medicamento é para você. Nunca o dê a outras pessoas, mesmo que a condição delas pareça ser a mesma que a sua.
Não guarde medicamentos vencidos ou indesejados. Leve-os à sua farmácia local, que se encarregará de descartá-los para você.
Se você tiver alguma dúvida sobre este medicamento, pergunte ao seu farmacêutico.
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Perguntas frequentes
Can aluminium hydroxide be bought over the counter?
The information provided indicates that aluminium hydroxide is available as capsules and can be prescribed by a doctor or pharmacist for specific conditions. However, it does not explicitly state whether it can be bought without a prescription.
What is aluminium hydroxide used for?
Aluminium hydroxide primarily serves two main purposes. It is used as an antacid to neutralise excessive stomach acid, helping with indigestion symptoms and protecting the stomach lining. Additionally, it can reduce the absorption of phosphate from food, which is sometimes prescribed for individuals with certain kidney diseases to control high phosphate levels.
How does aluminium hydroxide work to reduce stomach acid?
Aluminium hydroxide neutralises the excess acid in the stomach. By doing so, it helps to alleviate symptoms associated with indigestion and provides a protective effect on the stomach lining against irritation caused by acid.
What should I do if I forget to take a dose of aluminium hydroxide?
The article does not provide specific instructions on what to do if a dose of aluminium hydroxide is missed. It is generally recommended to follow the specific instructions from your doctor or pharmacist regarding your medication regimen.
Are there any natural alternatives or lifestyle changes that can help with indigestion alongside taking aluminium hydroxide?
For indigestion, certain lifestyle adjustments can be beneficial. Avoiding foods and drinks known to worsen symptoms, such as peppermint, tomatoes, chocolate, spicy foods, hot drinks, coffee, and alcohol, may help. It's also advised to avoid large meals, as these can exacerbate indigestion.
Leitura adicional e referências
- Medicamentos Completo BNF 89ª Edição; Associação Médica Britânica e Sociedade Real de Farmácia da Grã-Bretanha, Londres.
Sobre o autorVer biografia completa

Michael Stewart, MRPharmS
Gerente de Revisão de Folhetos de Medicamentos – Contratado, Farmacêutico
BPharm (Hons), MRPharmS
Michael é um farmacêutico comunitário atuando nas Midlands e em South Yorkshire, com mais de 20 anos de experiência em aconselhamento sobre medicamentos e condições médicas. Ele tem uma sólida formação em treinamento em saúde, tendo produzido e ministrado cursos de treinamento para equipes de farmácia e funcionários de ambientes de cuidados residenciais, incluindo enfermeiros. Ele também contribuiu para conselhos consultivos de farmácia para o manejo de condições de baixa gravidade na comunidade.
Sobre o revisor

Sid Dajani
Sultan Dajani se formou na Escola de Farmácia de Londres em 1994 e se tornou o membro mais jovem eleito para o conselho da Sociedade Real de Farmácia desde sua fundação em 1842.
Histórico do artigo
As informações nesta página são escritas e revisadas por clínicos qualificados.
Artigo também disponível em Inglês, Alemão, Espanhol, Francês, Italiano, Português, Hindi, Hebraico, Árabe, e Sueco.
Próxima revisão prevista para: 30 de maio de 2027
9 Jun 2024 | Última versão

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