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Clométhiazole

Swallow the capsules whole with a drink of water. Do not chew them.

Clomethiazole will make you sleepy. If you still feel sleepy the next day, do not drive and do not use tools or machines.

Do not drink alcohol whilst being treated with clomethiazole.

The most common side-effects are a runny or blocked nose, and headache. These should soon pass.

En un coup d'œil

  • Clomethiazole is a medicine used to help with insomnia, restlessness or agitation in elderly people, and alcohol withdrawal.

  • It is available as capsules or an oral liquid.

  • Take clomethiazole exactly as your doctor tells you to.

  • Do not drink alcohol or drive if you feel sleepy while taking this medicine.

  • Common side effects include headache, runny or blocked nose, and sore eyes.

  • It is only recommended for short-term use because you can become dependent on it.

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About clomethiazole

Type de médicament

Hypnotic and sedative

Utilisé pour

Insomnia, restlessness, or agitation, particularly in elderly people

Alcohol withdrawal symptoms

Disponible sous forme de

Capsules and oral liquid medicine

Insomnia, or poor sleep, is fairly common. If you have problems sleeping, it may mean that you have difficulty getting off to sleep, or you may wake up for long periods during the night, or you may wake up too early in the morning. 'Sleeping pills' like clomethiazole are considered a last resort, but are sometimes prescribed for a short period of time to help with a particularly bad spell of insomnia.

Clomethiazole is also prescribed in certain circumstances to help calm elderly people who are particularly restless or agitated. It is also used within specialist dependency units to relieve the symptoms of alcohol withdrawal.

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 clomethiazole it is important that your doctor or pharmacist knows:

  • Si vous êtes enceinte ou si vous allaitez.

  • If you have a heart condition, or liver or kidney problems.

  • If you have lung or breathing problems or a problem where you stop breathing for short periods at night (sleep apnoea).

  • If you have ever had a drug addiction or a personality disorder.

  • Si vous prenez d'autres médicaments. Cela inclut tous les médicaments que vous prenez et qui sont disponibles à l'achat sans ordonnance, ainsi que les médicaments à base de plantes et les médecines complémentaires.

  • Si vous avez déjà eu une réaction allergique à un médicament.

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

  • Take clomethiazole exactly as your doctor tells you to. Your dose will be on the label of the pack to remind you:

    • If you have been prescribed clomethiazole for insomnia, your doctor may recommend that you take one or two capsules each evening, or only on certain days of the week. Take the capsules just before you go to bed.

    • If you have been prescribed clomethiazole to help calm restlessness or agitation, your doctor is likely to recommend that you take one capsule three times daily, for a short period of time.

    • If you have been prescribed clomethiazole to help reduce alcohol withdrawal symptoms, your doctor or clinic will tell you how to take it.

  • If you have been prescribed capsules, swallow them whole with a drink of water. Do not chew them.

  • If you have been prescribed the oral liquid medicine it should be diluted with water or juice and swallowed immediately. Measure the correct amount of medicine for your dose and add it to a glass. Mix well with water or juice and ensure you drink the entire contents of the glass. Do not use plastic containers to mix your medicine in.

  • If you forget to take a dose, take it as soon as you remember unless it is nearly time for your next dose, in which case skip the missed dose. Do not take two doses together to make up for a forgotten dose.

  • Essayez de respecter vos rendez-vous réguliers avec votre médecin. Cela permet à votre médecin de suivre vos progrès.

  • Clomethiazole will make you sleepy. If you still feel sleepy the next day, do not drive and do not use tools or machines.

  • Do not drink alcohol whilst being treated with clomethiazole.

  • Clomethiazole is only recommended for a short period of time. This is because your body can become dependent on it after a while. This can cause problems when you then stop taking it.

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Along with their useful effects, all medicines can cause unwanted side-effects although not everyone experiences them. The table below lists some of the most common ones associated with clomethiazole. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve over the first few days of taking a new medicine, but speak with your doctor or pharmacist if any of the following side-effects continue or become troublesome.

Common clomethiazole side-effects


Que puis-je faire si je ressens cela ?

Maux de tête

Buvez beaucoup d'eau et demandez à votre pharmacien de vous recommander un antidouleur approprié. Si les maux de tête persistent, informez votre médecin

A runny or blocked nose, sore eyes

These can occur soon after taking a dose, but usually quickly pass

Si vous ressentez d'autres symptômes que vous pensez être dus à ce médicament, parlez-en à votre médecin ou à votre pharmacien.

  • Gardez tous les médicaments hors de la portée et de la vue des enfants.

  • Store the capsules in a cool, dry place, away from direct heat and light.

  • If you are using the oral liquid medicine it should be kept in its original container and stored in a refrigerator.

Informations importantes sur tous les médicaments

Si vous achetez des médicaments, vérifiez avec un pharmacien qu'ils sont sûrs à prendre avec vos autres médicaments.

Ne prenez jamais plus que la dose prescrite. Si vous soupçonnez que vous ou quelqu'un d'autre avez pris une surdose de ce médicament, rendez-vous au service des urgences de votre hôpital local. Emportez le contenant avec vous, même s'il est vide.

Si vous subissez une opération ou un traitement dentaire, informez la personne qui effectue le traitement des médicaments que vous prenez.

Ce médicament est pour vous. Ne le donnez jamais à d'autres personnes, même si leur état semble être le même que le vôtre.

Ne gardez pas de médicaments périmés ou indésirables. Apportez-les à votre pharmacie locale qui s'en débarrassera pour vous.

Si vous avez des questions concernant ce médicament, demandez à votre pharmacien.

Signaler les effets secondaires d'un médicament ou d'un vaccin

Si vous ressentez des effets secondaires, vous pouvez les signaler en ligne via le Site web de Yellow Card.

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Questions fréquemment posées

What is clomethiazole and what is it used for?

Clomethiazole is a type of medicine called a hypnotic and sedative. It is used to treat insomnia (poor sleep), restlessness, or agitation, especially in elderly people. It is also prescribed in specialist dependency units to help relieve symptoms of alcohol withdrawal.

Is clomethiazole a long-term treatment for sleep problems?

No, clomethiazole is typically considered a last resort for insomnia and is only recommended for short-term use. This is because your body can become dependent on it, which can cause problems when you stop taking it.

What should I do if I am prescribed the liquid form of clomethiazole?

If you have the oral liquid medicine, you must dilute it with water or juice and drink it immediately. Measure the correct dose, mix it well, and ensure you drink the entire contents of the glass. Do not use plastic containers to mix your medicine.

Are there any specific activities I should avoid while taking clomethiazole?

Yes, clomethiazole will make you sleepy. If you still feel drowsy the day after taking it, you should not drive or operate tools or machines. Additionally, it is very important not to drink alcohol while you are being treated with clomethiazole.

What should I do if I forget to take a dose?

If you forget a dose, take it as soon as you remember, unless it is almost time for your next dose. In that case, you should skip the missed dose and continue with your regular schedule. Do not take two doses at once to make up for a forgotten dose.

How should I store clomethiazole?

If you have the capsules, store them in a cool, dry place, away from direct heat and light. If you have the oral liquid medicine, it should be kept in its original container and stored in a refrigerator. Always keep all medicines out of the reach and sight of children.

Lectures complémentaires et références

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À propos de l'auteurVoir la biographie complète

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Michael Stewart, MRPharmS

Responsable de l'examen des notices de médicaments – Contractuel, Pharmacien

BPharm (Hons), MRPharmS

Michael est un pharmacien communautaire exerçant dans les Midlands et le South Yorkshire avec plus de 20 ans d'expérience dans le conseil sur les médicaments et les conditions médicales. Il possède une solide expérience en formation dans le domaine de la santé, ayant produit et dispensé des cours de formation pour les équipes de pharmacie et le personnel des établissements de soins résidentiels, y compris les infirmières. Il a également contribué aux comités consultatifs de pharmacie pour la gestion des affections de faible gravité dans la communauté.

À propos du critique

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Sid Dajani

Sultan Dajani a obtenu son diplôme à la London School of Pharmacy en 1994 et est devenu le plus jeune membre élu du conseil de la Royal Pharmaceutical Society depuis sa fondation en 1842.

Historique de l'article

Les informations sur cette page sont rédigées et examinées par des cliniciens qualifiés.

  • Next review due: 8 May 2027
  • 9 Nov 2022 | Dernière version

    Dernière mise à jour par

    Michael Stewart, MRPharmS

    Revu par

    Sid Dajani
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