Asthma Support Group
Asthma is a disease of the human respiratory system where the airways narrow, often in response to a "trigger" such as exposure to an allergen, cold air, exercise, or emotional stress. This airway narrowing causes symptoms such as wheezing, shortness of breath, chest tightness, and coughing, which respond to bronchodilators.

Seems like every medication out there has a "watch out if you have asthma" warning...I hope you have been able to talk to your doc (or whoever is covering while he is on vacation). You could also check with any pharmacist -- they are the true medication experts, and could help you decide if the benefits outweigh the risks in your case.
Hope you are have a good breathing day.