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Chlordiazepoxide - a benzodiazepine

Librium

Chlordiazepoxide is likely to affect your reactions and ability to drive. These effects can last into the following day. It is an offence to drive while your reactions are impaired.

Do not drink alcohol while you are on chlordiazepoxide.

Your course of treatment will be as short as possible. This can range from one or two days, to up to a maximum of four weeks of treatment.

About chlordiazepoxide

Tipo de medicamento

A benzodiazepine

Usado para

Anxiety; alcohol withdrawal

Também chamado de

Librium®

Disponível como

Cápsulas

Chlordiazepoxide works by affecting the way certain substances in your brain (called neurotransmitters) pass messages to your brain cells. It has a calming effect on various functions of your brain. The calming effect is helpful in people with anxiety, so chlordiazepoxide is sometimes prescribed to ease anxiety. If you have been prescribed it for this reason, you will be prescribed it for a very short period of time.

Chlordiazepoxide also has a muscle-relaxing effect. It is used to help relieve the symptoms of alcohol withdrawal. When you are alcohol-dependent, your body becomes used to lots of alcohol. This means that your body starts to develop withdrawal symptoms 3-8 hours after your last drink, as the effect of the alcohol wears off. So, even if you want to stop drinking, it is often difficult because of the withdrawal symptoms. Detoxification, or 'detox', involves taking a short course of a medicine which helps to prevent withdrawal symptoms when you stop drinking alcohol. The most commonly used medicine for this is chlordiazepoxide.

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

  • Se você está grávida ou amamentando.

  • If you have any breathing problems - for example, if you have a problem where you stop breathing for short periods at night (a condition called sleep apnoea).

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

  • If you have a mental health problem. This includes conditions such as psychosis, depression, obsessive conditions, phobias and personality disorders.

  • If you have ever had a drug or alcohol addiction and you are not being prescribed chlordiazepoxide for this reason.

  • If you have a condition causing muscle weakness, such as myasthenia gravis.

  • If you have any problems that affect your balance or co-ordination, or affect your ability to walk.

  • Se você já teve uma reação alérgica a um medicamento.

  • Se você estiver tomando outros medicamentos. Isso inclui quaisquer medicamentos que estejam disponíveis para compra sem receita médica, bem como medicamentos fitoterápicos e complementares.

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

  • Your doctor will tell you what dose of chlordiazepoxide to take, and how often to take it. The directions will also be printed on the label of the pack to remind you about what was said to you. Take your doses exactly as your doctor tells you to. As a guide:

    • If you are taking chlordiazepoxide for anxiety, you will probably be prescribed one capsule to take three times a day.

    • If you are taking it to prevent alcohol withdrawal symptoms, it is usual to take four doses a day. You will be prescribed a high dose on the first day you stop drinking, then your dose will gradually reduce over the next 5-10 days.

  • You can take chlordiazepoxide either with or without food.

  • If you forget to take a dose, take it when you remember. If when you remember, it is almost time to take your next dose, 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.

  • Remember to keep any regular appointments with your doctor or clinic. This is so your doctor can check on your progress.

  • Chlordiazepoxide is likely to affect your reactions and ability to drive. It is an offence to drive while your reactions are impaired. Do not drive until you know how you react, especially when you first start treatment. Please also be aware that the effects of chlordiazepoxide can last into the following day. Even if your driving ability is not impaired, should you drive, you are advised to carry with you some evidence that the medicine has been prescribed for you - a repeat prescription form or a patient information leaflet from the pack is generally considered suitable.

  • Chlordiazepoxide is taken for short periods of time only, often for just a few days. This is because taking it for longer can lead to you feeling dependent on it. Also, your body gets used to it quickly, and after this time it is unlikely to have the same effect.

  • If you are going through detox, you will have agreed not to drink any alcohol. Even if you are not taking chlordiazepoxide for this reason, you should still not drink alcohol. It will increase the risk of you experiencing unwanted effects.

  • Your doctor could recommend that you reduce your dose of chlordiazepoxide gradually when it is time to stop taking it. This is to reduce the risk of you experiencing withdrawal effects. Follow carefully any instructions your doctor gives to you.

  • Chlordiazepoxide can harm an unborn child so you must avoid getting pregnant or fathering a child while you are taking it. Make sure you have discussed with your doctor which types of contraception are suitable for you and your partner. You must use effective contraception during treatment and for seven months afterwards for women or four months afterwards for men. If you want to have a family, discuss this with your doctor so that you can be given advice from a specialist.

  • If you are due to have an operation or any dental treatment, please tell the person carrying out the treatment that you are taking chlordiazepoxide. This is because chlordiazepoxide increases the effects of some anaesthetics.

  • After detox, it is thought that you are less likely to go back to drinking heavily if you have counselling to help you to stay off alcohol. Your doctor, practice nurse, or local drug and alcohol unit can provide ongoing support when you are trying to stay off alcohol. Self-help groups such as Alcoholics Anonymous have also helped many people.

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Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with chlordiazepoxide. 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 chlordiazepoxide side-effects

O que posso fazer se passar por isso?

Feeling sleepy, weak, or light-headed (these may continue into the following day)

Não dirija e não use ferramentas ou máquinas. Não consuma álcool

Forgetfulness, feeling confused or unsteady

If these become troublesome, speak with your doctor

Feeling (or being) aggressive

This can happen in some people - let your doctor know about it as soon as possible

Dependence

To help reduce the risk of this, your doctor will prescribe chlordiazepoxide for the shortest possible time

Important: because of side-effects such as dizziness, muscle weakness and feeling sleepy or tired, taking this medicine may make you more likely to have a fall or an accident. Please take care, especially when getting up during the night or using stairs. Take extra care if you are frail, elderly or have any other risk factors for falls.

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

  • 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

Nunca tome mais do que a dose prescrita. Se suspeitar que você ou outra pessoa possa ter tomado uma overdose deste medicamento, vá imediatamente ao departamento de emergência 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, verifique com um farmacêutico se é seguro tomá-lo com seus outros medicamentos.

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 Cartão Amarelo.

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Leitura adicional e referências

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Histórico do artigo

As informações nesta página são escritas e revisadas por clínicos qualificados.

  • Next review due: 3 Jun 2028
  • 3 Jun 2025 | Última versão

    Última atualização por

    Michael Stewart, MRPharmS

    Revisado por

    Sid Dajani
flu eligibility checker

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