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Ranitidina para reduzir o ácido estomacal

Zantac

Nota do autor clínico Michael Stewart 18/5/2024: Further to earlier notes, all ranitidine products have now been discontinued in the UK. At the time of review there are no branded or generic products containing ranitidine available in the UK. Ranitidine may still be available in other countries. This medicine leaflet is based on medical information available 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.

Nota do autor clínico Michael Stewart 22/02/23: As a precautionary measure all ranitidine-containing products have been discontinued globally whilst the scientific investigation into its risks and benefits is ongoing. It is not known whether ranitidine products will be made available again in the future. If you have any concerns regarding your use of ranitidine please speak to your doctor or a pharmacist.

Nota do autor clínico Michael Stewart 21/11/2019: Since October 2019 a large number of ranitidine products have been recalled by their manufacturers. Pharmacies and other retailers have been told to remove these products from sale. The recalls are due to a risk of contamination with a potentially harmful chemical. There may be an ongoing shortage of ranitidine products as a consequence. If you have any concerns about the medicine you are taking you should speak with your pharmacist for advice.

Ranitidine reduces the amount of acid produced by your stomach.

Any side-effects are usually mild and do not last long.

Em resumo

  • Ranitidine is a medicine that reduces stomach acid, used for conditions like ulcers and acid reflux.

  • It comes as tablets or a liquid, and some lower strengths can be bought without a prescription.

  • Take ranitidine as directed, either before or after meals.

  • Possible side-effects include tummy pain, feeling sick, dizziness, and headache.

  • Speak to a doctor or pharmacist before taking ranitidine if you have certain symptoms or other medical conditions.

About ranitidine

Tipo de medicamento

H2-receptor antagonist

Usado para

Treatment of conditions caused by too much acid being produced in the stomach

Também chamado de

Zantac® (discontinued)

Disponível como

Comprimidos e medicamentos líquidos orais

Ranitidine belongs to a group of medicines that reduce the amount of acid produced by the cells in the lining of the stomach. They are called 'histamine H2-receptor antagonists', but are commonly also called Bloqueadores H2.

Ranitidine is helpful in the treatment of conditions caused by too much acid being produced in the stomach. These conditions include stomach ulcers (gastric ulcers), ulcers of the upper part of the intestine (úlceras duodenais), acid reflux or heartburn (reflux oesophagitis), and indigestão. Ranitidine is also prescribed to treat ulceration of the stomach which has been caused by anti-inflamatórios não esteroides (AINEs).

Acid is produced naturally in your stomach to help you digest food. Excessive amounts of acid can irritate the lining of your stomach, causing inflammation, ulcers and other conditions. Ranitidine works by reducing the amount of acid produced by your stomach. This helps to relieve symptoms and assist the healing process where damage has already occurred.

Ranitidine is available on prescription. You can also buy short courses of ranitidine at retail outlets for symptoms such as heartburn, indigestion and hyperacidity in adults and in children over 16 years of age.

Before taking ranitidine

To make sure that this is the right treatment for you, before you start taking ranitidine it is important that you speak with a doctor or pharmacist:

  • Se você está grávida ou amamentando.

  • If you have any of the following symptoms: difficulty swallowing, loss of blood, or weight loss, or if you are being sick.

  • Se você tiver algum problema com o funcionamento dos seus rins.

  • Se você tem um distúrbio sanguíneo hereditário raro chamado porfiria.

  • 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 ranitidine

  • Before you start this treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about ranitidine and will provide you with a full list of the side-effects which you may experience from taking it.

  • Take ranitidine exactly as your doctor tells you to, or as directed on the label if you have bought it. There are three different strengths of tablet available - 75 mg, 150 mg and 300 mg. Only the lower strength of tablet can be purchased. Ranitidine is taken once or twice a day.

  • You can take ranitidine either before or after meals.

  • If you forget to take a dose at your usual time, you can take it when you remember. However, if it is nearly time to take your next dose when you remember, leave out the missed dose and take your next dose when it is due. Do not take two doses together to make up for a forgotten dose.

Obtendo o máximo do seu tratamento

  • A course of treatment can vary in length depending upon the reason why you are taking ranitidine. It may be just for a few days to relieve your symptoms, or for several weeks to help an ulcer heal. Keep any appointments that you have booked with your doctor so that your progress can be checked.

  • Some people say that certain foods make their 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 you are overweight, this puts extra pressure on your stomach and encourages the symptoms of acid reflux. Losing some weight and eating a healthy balanced diet may help you.

  • Fumar aumenta a quantidade de ácido produzido pelo estômago e pode piorar seus sintomas. Se você é fumante, fale com seu médico ou farmacêutico sobre como parar de fumar.

Can ranitidine cause problems?

Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the ones associated with ranitidine, although these are generally mild and do not last long. 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.

Ranitidine side-effects

O que posso fazer se passar por isso?

Constipation or diarrhoea, tummy pain

Isso deve passar em breve

Sentindo-se enjoado (náusea)

Mantenha-se em refeições simples - evite alimentos ricos ou picantes

Feeling dizzy, headache

Isso deve passar em breve

If you experience any other symptoms which you think may be due to ranitidine, speak with your doctor or pharmacist for further advice.

How to store ranitidine

  • 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.

Se você comprar qualquer medicamento, sempre verifique com um farmacêutico se é seguro tomá-lo com seus outros medicamentos.

Se você for se submeter a uma operação ou a qualquer tratamento dentário, informe à pessoa que está realizando o tratamento quais medicamentos você está tomando.

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.

Relatar efeitos colaterais de um medicamento ou vacina

Se você sentir efeitos colaterais, pode relatá-los online através do Site do Yellow Card.

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Inseguro sobre misturar medicamentos?

Verifique possíveis interações entre medicamentos, suplementos e alimentos antes de tomá-los juntos.

Perguntas frequentes

Can ranitidine be used by children?

Ranitidine can be bought over-the-counter for use in adults and in children over 16 years of age for symptoms like heartburn, indigestion, and hyperacidity.

What happens if I take too much ranitidine?

If you suspect that you or someone else might have taken an overdose of ranitidine, you should go to the accident and emergency department of your local hospital immediately. Remember to bring the medicine container with you, even if it is empty.

How long does a course of ranitidine treatment typically last?

The duration of treatment with ranitidine can vary. It might be for just a few days to relieve symptoms, or it could extend for several weeks, for example, to allow an ulcer to heal fully. It's important to keep any scheduled appointments with your doctor to monitor your progress.

What lifestyle changes can help improve symptoms while taking ranitidine?

Certain foods like peppermint, tomatoes, chocolate, spicy foods, hot drinks, coffee, and alcohol may worsen symptoms, so avoiding them might help. Eating smaller meals can also be beneficial. If you are overweight, losing weight can reduce pressure on your stomach and improve acid reflux symptoms. Quitting smoking is also recommended, as it increases stomach acid production.

When was Zantac discontinued?

The article states that Zantac® (which is ranitidine) has been discontinued as a brand.

Leitura adicional e referências

Sobre o autorVer biografia completa

Imagem do autor

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

Imagem do autor

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.

  • Próxima revisão prevista para: 26 Abr 2027
  • 17 de maio de 2024 | Última versão

    Última atualização por

    Michael Stewart, MRPharmS

    Revisado por

    Sid Dajani
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