See your doctor for a pre-trip evaluation and advice. Make sure your allergies and asthma - particularly your asthma - are well controlled before you leave. Ask your doctor for a contingency plan in case you have an allergy or asthma attack on your trip. Your doctor may recommend you take along emergency medications such as antihistamines, bronchodilators, or oral or inhaled corticosteroids. Consider how the climate and season at your destination may affect your allergies and asthma medicines triggers exercise asthma. In damp, tropical climates, you may have increased exposure to allergens such as dust mites, airborne mold spores and specific pollens. Cold air in frigid, dry climates can increase asthma symptoms. Air pollution also can worsen allergy and asthma symptoms. Additional tips for traveling with asthma and allergies: Keep in mind that the air quality on planes can affect people with allergies and asthma. Although flights within the United States are smoke-free, many international flights aren't. If sinusitis clinics triggers exercise you're traveling abroad, see if you can book a nonsmoking flight. If not, ask for seats as far away from the smoking section as possible. Pack all medications in your carry-on luggage so that you have them in case you need them en route or if your luggage doesn't arrive on time. Be sure to pack more medication than the minimum you'll need. Store medications in their original containers. This provides instructions on dosages and refills and triggers exercise triggers exercise identifies the drugs for customs officials. If you cross several time zones, allow for time differences so that you maintain your medication dosage schedule. Carry a peak flow meter. Your doctor may ask you to monitor your peak flow rates. This can help guide adjustments of asthma medication. If you're receiving allergy shots (immunotherapy), remember to continue them if you're traveling for an extended period. If possible, it's best to receive maintenance doses of immunotherapy just before cough triggers triggers exercise travel.