Bronchodilators is the medication that is taken to improve breathing and are used for treating breathing related symptoms that are associated with allergic reaction. It is also used for expanding the airways and improving the breathing capacity function of patients with chronic obstructive pulmonary disease (COPD), bronchial asthma, emphysema, and other lung diseases. Bronchodilators function by relaxing the muscle surrounding the airways. These products are available over the counter or requires prescription. Basically there are available in three forms injectable, oral and inhaled. In oral forms they come in variety such as liquids, tablets and capsules, these oral forms are delivered in higher doses which is directly absorbed into the bloodstream and so they have relatively more side effects. Whereas inhaled once are directly deposited in the lungs causing less side effects. Bronchodilators are of basically-acting or long-acting beta2-agonists and anticholinergic agents or theophylline. They function so as to control asthma and COPD. Short acting bronchodilators function for fast relief of asthma symptoms and long acting bronchodilators function for control symptoms of asthma.
Cancer could be defined as uncontrolled cell growth in the body leading to organ malfunction. If untreated, it can lead to death. Uncontrolled growth of cell is managed by the body in several ways, one of them is by deploying white blood cells to detect and eradicate these cancerous cells. It has been discovered that the immune system could be manipulated to influence cancerous cells to destroy itself.
Renal cell carcinoma (RCC) is a kidney cancer that originates in the lining of the proximal convoluted tubule, a part of the very small tubes in the kidney that transport primary urine. RCC is the most common type of kidney cancer in adults, responsible for approximately 90–95% of cases.The drug is developed for fightting RCC.
Drugs for asthma attacks are bronchodilators. The products include pills, potions, inhalers and sprays. The effect is bronchiectasis, which can relieve asthma symptoms quickly and help prevent asthma attacks. This kind of medicine works well and is quite safe. But be careful not to overuse it. The main side effect is heartbeat. Commonly used are salbutamol (Salbutamol), terbutaline (Terbutaline) and so on. 
COPD drugs is a medicine used to treatment chronic obstructive pulmonary disease, such as bronchodilators, pde-4 inhibitors, steroids, combination therapies, etc.