Severe asthma, which is poorly controlled despite the elimination of modifiable factors and
the correct use of standard therapy, accounts only for 5% of people with asthma but it contributes to
approximately 50% of the economic costs of asthma. Because of this unmet need, novel therapies have been
developed for optimal treatment of these patients. The use of tiotropium, omalizumab, mepolizumab and
thermoplasty in well-selected patients provides better control and most importantly a reduction in asthma
exacerbations.