Ventolin means at least these things:

• Salbutamol-based asthma-medicine. Salbutamol is used in an acute asthma attack to reverse broncho-constriction, decreasing airway resisitance in an attack. The effects of inflammation, however, are not prevented by salbutamol and anti-inflammatory agents should also be used in the long term management of asthma.
• Song and album by Aphex Twin. It is inspired by aforementioned medicine.