my daughter who is 4, has been taking it for about 2 years. since she has been on it, it has done wonders for her. they were trying to dx her with Asthma, so they kept putting her on the Albuterol and pulmicort, i tried to tell them it was allergies, and asked her pediatrition if we could try the singular. since she started it, there's been no need for the albuterol & pulmicort.