Health Centres - Asmasal clickhaler
How does it work?
Asmasal clickhaler contains the active ingredient salbutamol, which is a type of medicine known as a short-acting beta 2 agonist. (NB. Salbutamol is also available without a brand name, ie as the generic medicine.)
Salbutamol works by acting on receptors in the lungs called beta 2 receptors. When salbutamol stimulates these receptors it causes the muscles in the airways to relax. This allows the airways to open.
In conditions where there is narrowing of the airways, such as asthma or chronic obstructive pulmonary disease (COPD, eg emphysema and chronic bronchitis), it is difficult for air to get in and out of the lungs. By opening the airways, salbutamol makes it easier to breathe.
Salbutamol is most commonly taken using an inhaler device. Inhaling the medicine allows it to act directly in the lungs where it is needed most. It also reduces the potential for side effects occurring in other parts of the body, as the amount absorbed into the blood through the lungs is lower than if it is taken by mouth.
Salbutamol when used as an inhaler is known as a reliever. This is because it works very quickly to relieve asthma attacks, wheezing, chest tightness or shortness of breath. Salbutamol inhalers can also be used to open the airways shortly before exercising to prevent wheezing.
What is it used for?
-
Asthma
-
Chronic obstructive pulmonary disease
Warning!
- Do not exceed the dose of salbutamol that your doctor has prescribed you to use.
- If your inhaler doesn't relieve wheezing or chest tightness as well as usual, or for as long as usual, or you need to use it more often than usual, you should consult your doctor as soon as possible. It may be that your asthma or COPD is getting worse and your doctor might need to give you another medicine.
- Inhalers may cause an unexpected increase in wheezing (paradoxical bronchospasm) straight after using them. If this happens, stop using the inhaler immediately and consult your doctor. The medicine should be stopped and an alternative treatment found.
- People with severe asthma should have regular blood tests to monitor the amount of potassium in their blood. This is because low oxygen levels in the blood (hypoxia) and various asthma medicines, including this one, can lower blood potassium levels.
Use with caution in
- Heart disease
- High blood pressure
- Hyperthyroidism
- Irregular heart beats (arrhythmias)
Not to be used in
- Known sensitivity or allergy to any ingredient
This medicine should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy.
Pregnancy and Breastfeeding
Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.
- It is important that asthma is well controlled in pregnant women. Wherever possible, asthma medications should be taken by inhaler, as this minimises the amount of medicine that enters the bloodstream and crosses the placenta. Seek medical advice from your doctor.
- Salbutamol passes into breast milk in small amounts. The effect of this on the breastfed baby is unknown, therefore this medicine should be used with caution in breastfeeding mothers. However, in general, salbutamol inhalers can be used as normal during breastfeeding, because the amount of medicine that passes into the breast milk after using an inhaler is negligable and unlikely to harm the baby. Seek medical advice from your doctor.
Side effects
Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Because a side effect is stated here, it does not mean that all people using this medicine will experience that or any side effect.
- Shaking, usually of the hands (tremor)
- Nervous tension
- Headache
- Faster than normal heart beat (tachycardia)
- Awareness of your heart beat (heart palpitations)
- Muscle cramps
- Low blood potassium level (hypokalaemia)
- Unexpected narrowing of the airways (paradoxical bronchospasm)
The side effects listed above may not include all of the side effects reported by the drug's manufacturer.
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