I would try Alvesco…it is a steriod inhaler but with out bronchial dilater. According to two of the top NYC Vocal Doctors, it has larger molecules and doesn’t affect the larynx and vocal cords as much. It still contains the risk factors of other inhalers, but less so than ADVAIR. I’m a professional singer and teacher, so I am going to try it.
As of now (17 years on Advair) I am just starting to lose my upper range. Very frustrating.
Gargling DOES help but finding your own cocktail of mixtures is hit and miss.
Best of luck
As of 2011 [update] there was no evidence that an increase in physical performance occurs after inhaling salbutamol, but various reports for benefit when delivered orally or intravenously.   In spite of this, salbutamol required "a declaration of Use in accordance with the International Standard for Therapeutic Use Exemptions" under the 2010 WADA prohibited list. This requirement was relaxed when the 2011 list was published to permit the use of "salbutamol (maximum 1600 micrograms over 24 hours) and salmeterol when taken by inhalation in accordance with the manufacturers’ recommended therapeutic regimen."