Albuterol (also known as salbutamol) is used to treat wheezing and shortness of breath caused by breathing problems such as asthma. Albuterol belongs to a class of drugs known as bronchodilators. It works in the airways by opening breathing passages and relaxing muscles. SIDE EFFECTS: Nervousness, shaking (tremor), headache, nausea or dizziness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.