Ventolin 4mg(Albuterol) (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (e.g., asthma, chronic obstructive pulmonary disease). It is also used to prevent asthma brought on by exercise. Ventolin 4mg(Albuterol) belongs to a class of drugs known as bronchodilators. It works in the airways by opening breathing passages and relaxing muscles. Controlling symptoms of breathing problems can decrease time lost from work or school.

USAGE:

Follow the instructions for test sprays in the air (priming) if you are using a new canister, or if you have not used it for 4 weeks or longer. Avoid spraying the medication in your eyes.
Before each dose, shake the inhaler well. Inhale this medication by mouth, usually every 4 to 6 hours as needed or as directed by your doctor. Dosage is based on your medical condition and response to treatment. Do not increase your dose or use it more frequently than prescribed without your doctor's approval.
If you are using this medication to prevent asthma brought on by exercise, inhale 2 puffs 15 to 30 minutes before exercise or as directed by your doctor.
If you find it difficult to use this inhaler correctly, it may help to use a spacer device with this inhaler. Ask your doctor or pharmacist for more information.
Clean and dry the inhaler at least once daily as directed in the Patient Information Leaflet. It should also be cleaned anytime it appears to be clogged or is not working properly.
If you use other asthma drugs (including inhaled medications), ask your doctor about how to properly use this medication with your other asthma medicines.
If this medication stops working well, or if your breathing symptoms become worse, or if you need to use this medication more frequently than usual, seek immediate medical attention.
Keep track of the number of inhalations you use, and discard the inhaler after you have used the labeled number of inhalations on the product package. Test sprays used to prime the inhaler should also be counted.

SIDE EFFECTS:

Albuterol has been studied thoroughly in clinical trials, in which the side effects of a group of people taking the drug are documented and compared to another group not taking the medicine. As a result, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
 
In these studies, some of the common Ventolin 4mg(Albuterol) side effects included:
    - Coughing
    - Feelings of a rapidly or forcefully beating heart (heart palpitations)
    - Headaches
    - An irritated or runny nose
    - Muscle or bone pain
    - Nausea
    - Nervousness
    - Shakiness (tremors)
    - Insomnia
    - Throat irritation
    - Upper respiratory tract infections (such as the common cold)
    - Vomiting      

These side effects may not apply to every  Ventolin 4mg(Albuterol) product, as different products may have different side effects.