[r9etb]

Proventil is albuterol sulfate, empirical formula is (C₁₃H₂₁NO₃)₂·H₂SO₄.

Warrick is albuterol. The empirical formula is C₁₃H₂₁NO₃.

The sulfate is not counted against the base dosage of 90 mcg.

[brityank]

The Warrick Albuterol has a molecular weight of albuterol of 239.3 µg.
My ProAir^©HFA (albuterol sulfate) has a molecular weight of albuterol sulfate of 576.7 µg.

The formulation changed.

The insert for my ProAir^©HFA states it delivers 108 µg albuterol sulfate (equivalent to 90 µg of albuterol).

They lowered the speed of delivery, and inreased the weight of the 'bullet'. The new formulation is not effective.