The FAQ describes BreathiZen as a natural daily respiratory spray formulated to support clearer breathing, airway comfort and mucus management.
Daily means a once-a-day routine. Respiratory spray means an oral spray format. Support is the careful word: it describes helping a normal function, not treating a condition.
It does not say who it is for in medical terms, and it does not promise an outcome. For that, read the page's who-this-is-for line: generally healthy adults wanting daily support, not people managing a diagnosed respiratory condition.