 [ Symptoms ] what is a zygote in pregnancy [ Disease ] most definitely i have worked in the field of respiratory therapy for 35 years anyone who suffers from asthma must be very careful when traveling from lower altitudes to higher altitudes the difference in temperatures alone can trigger an asthma attack not to mention the humidity humidity in lower elevations is much thicker that in higher elevations before traveling next time ask you doctor to give you a prescription for inhalers which consist of xopenex and atrovent the xopenex is quick acting for acute attacks while the atrovent is a longer lasting maintanence medication which wards off attacks you may also consider traveling with a nebulizer that can be used in a car acdcbattery or anywhere for that matter also when exercising in higher elevations always remember to monitor you breathing you may want to also invest in a small pulse oximeter which can be purchsed at pharmacies home care stores or the internet hope this information helps you