Atenolol - un bêta-bloquant

About atenolol

Atenolol belongs to the group of medicines referred to as beta-blockers. It is a medicine which works on the heart and blood vessels. It does this by blocking tiny areas (called beta-adrenergic receptors) where messages sent by some nerves are received by your heart and blood vessels. As a result, your heart beats more slowly and with less force. The pressure of blood within your blood vessels is reduced and it is easier for your heart to pump blood around your body.

These actions are of benefit if you have high blood pressure (hypertension), or to prevent abnormally fast heart rhythms if you have arrhythmias. Because your heart is using less energy, it also helps to reduce chest pain if you have angina.

Atenolol is also available in combination with other medicines used to treat high blood pressure and angina. Combination brands of atenolol with a 'water tablet' (diuretic) called chlortalidone are Tenoret® and Tenoretic® (this combination also goes by the name co-tenidone).

Atenolol can also be prescribed to help prevent migraine. The leaflet does not contain information about this use of atenolol. If you have been given it for this reason, please ask your doctor if you have any questions about your treatment.

Before taking atenolol

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 atenolol it is important that your doctor knows:

• Si vous êtes enceinte ou si vous allaitez.

• Si vous souffrez d'asthme ou de tout autre trouble respiratoire.

• Si vous avez des problèmes de fonctionnement des reins.

• Si vous souffrez d'hypotension ou d'une mauvaise circulation sanguine.

• Si vous êtes diabétique.

• Si vous souffrez d'un problème de peau appelé psoriasis.

• Si vous souffrez d'une maladie entraînant une faiblesse musculaire, appelée myasthénie grave.

• Si l'on vous a dit que vous aviez un rythme cardiaque lent ou un bloc cardiaque (un rythme cardiaque lent et irrégulier).

• Si l'on vous a dit que vous souffriez de douleurs thoraciques causées par des spasmes des vaisseaux sanguins du cœur, appelées angine de Prinzmetal.

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

• Si vous avez déjà eu une réaction allergique à un médicament, ou si vous avez déjà eu une autre réaction allergique grave.

How to take atenolol

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

• Take atenolol exactly as your doctor tells you to. It is usually taken once daily, in the morning. Some people taking it for angina may be prescribed two doses a day. Your doctor will tell you which dose is right for you, and the directions for taking it will also be printed on the label of the pack to remind you about what the doctor said.

• Atenolol tablets are available in three different strengths - 25 mg, 50 mg and 100 mg. Each time you collect a fresh supply of tablets, it's a good idea to check the strength on the packet to make sure they are the strength you are expecting. If you have any questions, please ask your pharmacist to advise you.

• You can take atenolol either with or without food, but try to take your doses at the same time of day each day as this will help you to remember to take it regularly. The tablets are best swallowed with a drink of water.

• Si vous oubliez de prendre une dose, prenez-la dès que vous vous en rendez compte (sauf s'il est presque temps de prendre la dose suivante, auquel cas ne prenez pas la dose oubliée et prenez la dose suivante normalement). Ne prenez pas deux doses en même temps pour compenser une dose oubliée.

Tirer le meilleur parti de votre traitement

• Essayez de vous rendre à vos rendez-vous réguliers avec votre médecin. Il pourra ainsi vérifier vos progrès.

• Il est probable que votre médecin vous donne des conseils en matière de régime alimentaire et de mode de vie : manger sainement, ne pas fumer et faire de l'exercice régulièrement. Si c'est le cas, il est important que vous suiviez ces conseils.

• If you drink alcohol, ask your doctor for advice about taking atenolol and alcohol. Atenolol will worsen the effects of alcohol, which will make you feel dizzy.

• If you buy any medicines, check with a pharmacist that they are suitable for you to take with atenolol. Some medicines may not be (including some anti-inflammatory painkillers, and cold or flu remedies).

• Si vous devez subir une opération ou un traitement dentaire, il est important d'informer la personne chargée du traitement que vous prenez un bêta-bloquant. Ceci est particulièrement important si vous êtes susceptible d'être anesthésié.

• If you have diabetes, atenolol can block the symptoms of low blood sugar. Your doctor will advise you about this.

• Treatment with atenolol is usually long-term. Continue to take the tablets unless your doctor tells you to stop. Stopping treatment suddenly can cause problems in some people, so your doctor may want you to reduce your dose gradually if this becomes necessary.

Can atenolol 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 most common ones associated with atenolol. 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.

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

How to store atenolol

• Conservez 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