Advir is a long acting bronchodiltor & steroid ( inhaler)
Singular is a long acting bronchodiltor & allergy medication ( inhaler or pill form)
The steroid in the Advir could also make you hyped up.
If you have allergies sesonal or enviromental the singular might be a better choice.
I am on Singular now. Im having sevear Ashtma problems and trying anything.
I was on a steroid to treat my Ashtma and I was so hyper and my face was a liitle puffy. (But I was on an oral pill form steroid not Advir)