Fenoterol solution is primarily used as a bronchodilator in the treatment of respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD). It works by relaxing the muscles in the airways, making it easier to breathe. This solution is often administered via inhalation, using a nebulizer or inhaler, to provide rapid relief from symptoms like wheezing, shortness of breath, and chest tightness. Additionally, it may be used in some cases to manage bronchospasms during anesthesia or in emergency situations. Its fast-acting nature makes it a valuable option for acute respiratory distress. However, it should be used with caution in patients with cardiovascular conditions due to potential side effects like increased heart rate or palpitations.