When someone has moderate asthma symptoms or occasionally has trouble breathing, OTC inhaler provide easy relief.  Over-the-counter (OTC) inhalers, in contrast to prescription ones, are available for immediate, short-term treatment of wheezing, chest tightness, and shortness of breath without a prescription.  These inhalers usually contain either racepinephrine or epinephrine, which facilitates breathing by opening airways.  Although over-the-counter inhalers can be useful in an emergency or for people with minor symptoms, they cannot replace expert medical treatment or long-term asthma therapy.  Carefully reading the label, according to dosing guidelines, and seeking medical advice if symptoms worsen are all crucial for consumers.