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Quinina para malária

Quinine is prescribed to treat malaria in people who have been bitten by an infected mosquito. It is not suitable for preventing malaria.

Quinine is an ingredient of drinks such as tonic water and bitter lemon - try to avoid these while you are taking quinine tablets.

Contact a doctor immediately if anyone swallows quinine by accident, or if you take more than the prescribed dose.

Em resumo

  • Quinine is a medicine used to treat the infection malaria.

  • Take quinine exactly as your doctor tells you, even if you feel better.

  • Tell your doctor if you have certain conditions, like heart or kidney problems, before taking quinine.

  • Common side-effects include diarrhoea, headache, and ringing in your ears.

  • Seek urgent medical help if you suspect an overdose or experience severe side-effects like breathing difficulties.

  • Keep quinine tablets out of reach of children.

About quinine for malaria

Tipo de medicamento

Um medicamento antimalárico

Usado para

To treat malaria

Também chamado de

Quinine bisulfate, quinine dihydrochloride, quinine sulfate

Disponível como

Comprimidos e injeção

Malária is a very serious infection which you can develop from a bite from an infected mosquito. The most common symptom is high temperature (fever) and a flu-like illness. Malaria can occur even up to a year after travelling in an area in which there is malaria. Prompt treatment for malaria is essential. If you feel unwell and have recently visited an area in which there is malaria, you should seek imediato medical advice, even if you have taken your antimalarial medication correctly.

Malaria is caused by a parasite called plasmodium. The parasite lives inside the stomach of an infected female mosquito and is passed to humans from a mosquito bite. There are four types of plasmodium that cause malaria. Of the four, Plasmodium falciparum is usually the most serious, so this type of malaria is likely to be treated in hospital.

Quinine is also used to treat night-time leg cramps. For information about this please see the medicine leaflet Quinine for leg cramps.

Before taking quinine

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking quinine it is important that your doctor knows:

  • Se você está grávida ou amamentando.

  • If you have any problems with your eyes, or with your hearing.

  • If you have a heart condition, such as an irregular heart rhythm.

  • Se você tiver algum problema com o funcionamento dos seus rins, ou qualquer problema com o funcionamento do seu fígado.

  • If you have blood in your urine.

  • If you have been told you have an imbalance of salt levels in your blood.

  • Se você tem uma condição que causa fraqueza muscular, chamada miastenia gravis.

  • If you have glucose 6-phosphate dehydrogenase deficiency. This is a genetic disorder where there is a lack of an enzyme often known as G6PD. People with this disorder have problems after eating foods such as fava beans.

  • 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.

  • If you have ever had an allergic reaction to a medicine, or if you have had a bad reaction to quinine in tonic water or any other soft drink.

How to take quinine

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

  • Take quinine exactly as your doctor tells you to. If you are being treated in hospital, your nurse will tell you when your tablets are due. If you are being treated at home, your doctor or pharmacist will tell you how many tablets to take for each dose, and when the doses should be taken. Your dose will also be printed on the label of the pack to remind you about what the doctor said to you. Space the doses evenly throughout the day and continue to take the tablets until the course is finished, unless your doctor tells you to stop sooner. It is important you do this even if you feel better. It is to make sure that all of the parasite has been removed from your body.

  • Swallow your doses with a drink of water. You can take quinine tablets either before or after meals.

  • Se você esquecer de tomar uma dose, tome-a assim que se lembrar. Tente tomar o número correto de doses a cada dia, mas não tome duas doses ao mesmo tempo para compensar uma dose esquecida.

Obtendo o máximo do seu tratamento

  • If you are being treated from home, make sure you keep your regular appointments with your doctor. This is so your doctor can check on your progress.

  • Your doctor will discuss with you the possibility of unwanted side-effects of the treatment. It is important that you let your doctor know, antes you take your next dose, if you experience any of the following: impaired hearing, ringing noises in your ear, headaches, feeling sick (nausea), or any problems with your eyesight.

  • Quinine is present in drinks such as tonic water and bitter lemon. It is probably best to avoid these drinks while you are taking quinine tablets.

  • Never take more than the prescribed dose. Taking too much quinine can cause serious problems. Also, quinine is dangerous if it is taken by a child, so keep the tablets away from children. If you suspect that someone has taken an overdose of quinine or has swallowed some by accident, you must contact a doctor imediatamente. Alternatively, go to the accident and emergency department of a local hospital. Do not delay. Take the container with you, even if it is empty. This is so the doctor knows what has been taken.

  • If you buy any medicines, always check with a pharmacist that they are suitable to take with your other medicines. This is because some medicines (such as cimetidine which is taken for heartburn) can interfere with quinine and increase the risk of serious side-effects.

  • If you are being treated for diabetes, quinine can lower the level of sugar in your blood. Your doctor will be able to advise you about this.

Can quinine 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 side-effects associated with quinine. You will find a full list in the manufacturer's information leaflet supplied with your medicine. Although unwanted effects often improve as your body adjusts to a new medicine, serious side-effects do still sometimes occur. Contact your doctor for advice as soon as possible if you experience any of the following:

Quinine side-effects

O que posso fazer se passar por isso?

Diarrhoea, feeling sick (nausea), feeling weak or confused, 'ringing' in your ears, headache, having a spinning sensation (vertigo)

Tell your doctor as soon as possible

Vision problems, such as blurred vision and colour changes

Tell your doctor as soon as possible. Do not drive while your vision is affected

Hot and flushed skin, rashes, muscle weakness, increased sensitivity to light

Se algum destes se tornar problemático, informe o seu médico

Difficulty breathing, swelling around your mouth or face

Fale com seu médico

imediatamente

- these are signs of an allergy to quinine

Unexplained bleeding, unusual bruising, sore throats or infections

Tell your doctor as soon as possible - these could be signs of a serious blood disorder and your doctor will want to check for this

Se você sentir quaisquer outros sintomas que acha que podem ser causados pelos comprimidos, por favor, fale com seu médico ou farmacêutico para mais orientações.

How to store quinine

  • 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

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

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.

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

What is the primary difference between the types of malaria caused by the Plasmodium parasite?

There are four types of Plasmodium parasites that cause malaria. Among them, Plasmodium falciparum is generally considered the most severe type and often requires hospital treatment.

What should I do if I am traveling to a malaria-prone area and accidentally consume quinine from tonic water?

The article states that it is 'probably best to avoid' drinks containing quinine, like tonic water, while taking quinine tablets. It does not elaborate on accidental consumption while traveling to a malaria-prone area, but generally, if you are being treated for malaria with quinine, it's best to avoid additional sources of quinine.

How long does treatment with quinine typically last?

The article advises to 'continue to take the tablets until the course is finished, unless your doctor tells you to stop sooner'. It emphasises the importance of completing the full course, even if you feel better, to ensure all parasites are removed from your body. The specific duration of treatment is not specified and would be determined by your doctor.

Are there any specific foods I should avoid while taking quinine?

The article mentions that people with glucose 6-phosphate dehydrogenase deficiency, a genetic disorder, have problems after eating foods such as fava beans. If you have this deficiency, you should discuss this with your doctor before taking quinine. Otherwise, no specific foods are generally mentioned for avoidance.

Can quinine affect blood sugar levels, especially for individuals with diabetes?

Yes, if you are being treated for diabetes, quinine has the potential to lower your blood sugar level. Your doctor will be able to provide specific advice regarding this.

What should I do if I experience unusual bleeding or bruising while taking quinine?

If you experience unexplained bleeding, unusual bruising, sore throats, or infections, you should contact your doctor as soon as possible. These could be indicators of a serious blood disorder, and your doctor will want to check for this.

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: 16 Jun 2027
  • 16 Jun 2024 | Última versão

    Última atualização por

    Michael Stewart, MRPharmS

    Revisado por

    Sid Dajani
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