Ventolin 100 Mcg Evohaler. Ventolin Evohaler contains a medicine called Salbutamol which belongs to a group of medicines called fast acting bronchodilators , Ventolin Evohaler is used to treat breathing problems in people with asthma and similar conditions. This includes relieving and preventing asthma brought on by exercise or other triggers. These are things, which bring on asthma symptoms in some people. Common triggers include house dust, pollen, cats, dogs and cigarette smoke. A valid prescription should be available upon delivery