Theophylline

About theophylline

Theophylline is an oral bronchodilator medicine which is prescribed for people with breathing problems, such as asthma and chronic obstructive pulmonary disease (COPD). It is a medicine that you take by mouth, as a tablet or capsule.

Theophylline works by opening up the air passages in your lungs so that air can flow into your lungs more freely. This makes breathing easier and helps relieve symptoms such as coughing, wheezing and shortness of breath.

It is important always to stick to the same brand of theophylline. This is because the amount of theophylline absorbed by your body varies greatly between brands. If you start taking a different brand to the one you normally have, you may be getting too much or too little theophylline.

Before taking theophylline

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 theophylline it is important that your doctor or pharmacist knows:

• Si está embarazada, esperando un bebé o en período de lactancia.

• If you have a heart condition or have had a heart attack.

• If you have kidney or liver problems.

• Si tiene una glándula tiroides hiperactiva (hipertiroidismo).

• Si tiene la tensión alta.

• Si tiene úlcera de estómago.

• If you drink alcohol, or smoke.

• Si padece epilepsia.

• If you are currently unwell with a high temperature (fever).

• Si padece un raro trastorno sanguíneo hereditario llamado porfiria.

• Si le han dicho que tiene niveles bajos de potasio en sangre.

• Si está tomando o utilizando otros medicamentos o inhaladores. Esto incluye cualquier medicamento que esté tomando y que pueda adquirirse sin receta, así como medicamentos a base de plantas y complementarios.

• Si alguna vez ha tenido una reacción alérgica a un medicamento.

How to take theophylline

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

• Theophylline is usually taken twice a day, although some doctors may prescribe just one dose a day. Take the tablets exactly as your doctor tells you to.

• For twice daily doses, always try to take your doses 12 hours apart and at the same times each day. For example, at 8 am and 8 pm each day.

• Your dose may be adjusted over the first few weeks depending on the results of some blood tests. This allows your doctor to make sure that you have the dose that helps your condition and avoids any unwanted symptoms. Your doctor or pharmacist will explain to you the directions for taking your doses, and this information will also be printed on the label of the pack of tablets to remind you.

• You should swallow the tablets whole with a drink of water. Do not crush or chew the tablets.

• If you forget to take a dose, leave out the missed dose and take the next dose at the normal time. Do not take two doses together to make up for a forgotten dose.

Aproveche al máximo su tratamiento

• Continue to take theophylline unless your doctor tells you otherwise. Bronchodilators like theophylline are usually prescribed long-term.

• Intente acudir a las citas periódicas con su médico. Así podrá revisar su estado de salud con regularidad. Su médico querrá hacerle análisis de sangre de vez en cuando para asegurarse de que está recibiendo la dosis correcta y también para comprobar los niveles de potasio en sangre.

• The amount of theophylline in your blood should be kept within a certain range. It can vary if you are unwell, or if you start or stop smoking, take other medicines, or drink more alcohol than usual. This is because these things interfere with the way theophylline is handled by your body. Some of these things will increase the amount of theophylline in your body, leading to side-effects. Others will reduce it, leading to your treatment not being as effective as it should be.

• Si en algún momento nota que sus síntomas empeoran, póngase inmediatamente en contacto con un médico o una enfermera.

• If you want to buy any medicines, check with a pharmacist that they are safe for you to take. Some medicines (including the herbal remedy St John's wort) can affect the levels of theophylline in your blood and should not be taken alongside it without your doctor knowing.

• Some vaccines, such as the flu vaccine, may also affect theophylline levels. Make sure you tell your doctor about any vaccinations you have.

• If you are due to have an operation or any dental treatment, tell the person carrying out the treatment which medicines you are taking, as some anaesthetics can interfere with theophylline.

• Theophylline can be very toxic in overdose. If you suspect that someone has taken more than they should (and especially if it is a child), go to the accident and emergency department of your local hospital straightaway. Take the container with you, even if it is empty.

Can theophylline 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 theophylline. 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 side-effects continue or become troublesome.

Si experimenta cualquier otro síntoma que considere que puede deberse a este medicamento, consulte a su médico o farmacéutico.

How to store theophylline

• Mantenga todos los medicamentos fuera del alcance y de la vista de los niños.

• Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.

Información importante sobre todos los medicamentos