Comprimés de lofexidine
BritLofex, Lucemyra
Revu par Sid DajaniDernière mise à jour par Michael Stewart, MRPharmSDernière mise à jour 11 fév 2025
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Note de l'auteur clinique Michael Stewart 01/03/2022: BritLofex® tablets were discontinued in the UK in October 2018. At the time of review there are no branded or generic products containing lofexidine available in the UK. Lofexidine 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.
It is usual to take four tablets over the first day. Your dose will then be increased over the next few days to suit your needs. A course of treatment usually lasts 7-10 days.
The main side-effects are dizziness, dry mouth and feeling sleepy.
At the end of your treatment your dose will be reduced gradually over a few days. Do not stop taking lofexidine suddenly, as this can cause your blood pressure to rise suddenly which could be harmful.
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About lofexidine
Type de médicament | An alpha-adrenergic agonist medicine |
Utilisé pour | Reducing withdrawal symptoms during opioid detoxification (such as heroin, morphine or dihydrocodeine detox) |
Aussi appelé | Lucemyra® (USA), BritLofex® (UK - discontinued) |
Disponible sous forme de | Comprimés |
Lofexidine is a treatment for opioid drug dependence. Medicines for drug dependence are mainly used to reduce or prevent withdrawal symptoms while trying to break drug use.
Lofexidine is usually used alongside, but sometimes instead of, other medicines taken for opioid drug dependence such as methadone or buprenorphine. It helps to reduce withdrawal effects such as chills, sweating, stomach cramps, muscle pain, difficulties sleeping and runny nose.
Before taking lofexidine
Retour au sommaireSome 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 lofexidine it is important that your doctor knows:
Si vous êtes enceinte ou si vous allaitez.
If you have a heart condition, or if you have had a heart attack, or if you have a heart rhythm problem such as a slow or irregular heartbeat.
If you have low blood pressure.
If you have had a stroke or 'mini-stroke' (also known as a transient ischaemic attack, or TIA).
If you are feeling depressed.
Si vous avez des problèmes avec le fonctionnement de vos reins.
Si vous prenez ou utilisez 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 complémentaires.
Si vous avez déjà eu une réaction allergique à un médicament.
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How to take lofexidine
Retour au sommaireLofexidine is used as part of a detoxification programme. Because each programme is tailored to meet a person's individual needs and no two detoxifications are exactly the same, it is important that you take lofexidine exactly as your doctor tells you to.
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about lofexidine, and will also provide you with a full list of the side-effects which you could experience from taking it.
Your doctor or community drug-team worker will tell you when and how often to take the tablets. It is likely that you will be asked to take four tablets over the course of the first day. Take your last dose of the day at bedtime, as this will help to reduce any problems you may have sleeping. Your dose may then be increased over the next few days. The maximum number of tablets you will be prescribed to take at any one time is 4, and the maximum number of tablets during any one day is 12.
You can take lofexidine tablets either before or after meals. Swallow the tablets whole with a drink of water.
If you forget to take a dose, take it as soon as you remember and then continue as before. Do not take two doses together to make up for a missed dose.
It is usual to take lofexidine for around 7-10 days, although sometimes a course of treatment can be for longer than this. You should not stop taking lofexidine suddenly, as this can cause your blood pressure to rise quickly which could be harmful. At the end of the treatment, your doctor will ask you to reduce your dose gradually over a few days to prevent this from happening.
Tirer le meilleur parti de votre traitement
Retour au sommaireIt is important that you keep your regular appointments with your doctor/clinic so that your progress can be reviewed. Your blood pressure and pulse rate will need to be regularly monitored (especially in the first few days) to make sure you are taking a dose which helps your condition but avoids unwanted symptoms.
Lofexidine will help you to deal with withdrawal symptoms but it will not help you through cravings. You are more likely to succeed in breaking your drug habit if you have support and counselling. Local drug community teams, self-help groups and other agencies can be of help. It is much harder to 'do it alone', so go for counselling and help if it is available in your area. Try to stay positive and relaxed, drink plenty of fluids, and eat a light diet.
You should not drink alcohol while you are on lofexidine because it can increase side-effects such as feeling sleepy or dizzy.
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Can lofexidine cause problems?
Retour au sommaireAlong 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 lofexidine. 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.
Very common lofexidine side-effects (these affect more than 1 in 10 people) | Que puis-je faire si je ressens cela ? |
Se sentir étourdi ou somnolent | If you feel dizzy, sit down for a while until you feel better. It is important you do not drive and do not use tools or machines while affected. Do not drink alcohol |
Dry mouth and throat | Essayez de mâcher du chewing-gum sans sucre ou de sucer des bonbons sans sucre |
Slow heart rate, low blood pressure | Votre médecin vérifiera cela |
Si vous ressentez d'autres symptômes que vous pensez être dus au médicament, parlez-en à votre médecin ou à votre pharmacien pour obtenir des conseils supplémentaires.
How to store lofexidine
Retour au sommaireGardez tous les médicaments hors de la portée et de la vue des enfants.
Conserver dans un endroit frais et sec, à l'abri de la chaleur et de la lumière directes.
Informations importantes sur tous les médicaments
Retour au sommaireInformations importantes sur tous les 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.
Si vous achetez des médicaments, vérifiez avec un pharmacien qu'ils sont sans danger à prendre avec vos autres médicaments.
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 jamais 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 Yellow Card.

Vous n'êtes pas sûr de mélanger des médicaments ?
Vérifiez les interactions possibles entre les médicaments, les compléments et les aliments avant de les prendre ensemble.
Lectures complémentaires et références
- Médicaments Complets BNF 89e Édition; Association Médicale Britannique et Société Royale Pharmaceutique de Grande-Bretagne, Londres.
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Historique de l'article
Les informations sur cette page sont rédigées et examinées par des cliniciens qualifiés.
Next review due: 11 Feb 2028
11 fév. 2025 | Dernière version

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