2) Cardiopulmonary stress from altitude, cabin pressure, and extreme weather
What’s going on: Pressurized cabins are equivalent to 1,800–2,400 m altitude; there is less oxygen per breath. Heat/humidity or extreme cold require quick adjustments to the heart and lungs.
Warning signs: Unusual shortness of breath, chest tightness, dizziness, palpitations, swollen ankles.
How to reduce your risk: Temperate climate destinations, shorter trips, portable oximeter if you have COPD/HF, and plan with your cardiologist or pulmonologist before long flights.
3) More severe immunosenescence infections
What’s going on: With age, the immune system responds more slowly; new pathogens, air conditioners and local waters increase the risk of respiratory or gastrointestinal symptoms.
Warning signs: persistent fever, diarrhea with dehydration, cough that gets worse.
How to reduce risk: up-to-date vaccinations (influenza, pneumococcus, COVID-19, as indicated), strict hygiene guidelines, bottled water, and choice of well-ventilated and cleaned accommodation.
4) Medication chaos when crossing time zones
What’s going on: Time adherence is critical in drugs such as anticoagulants, insulin, antihypertensives or thyroid drugs. Changing time zones causes omissions or duplications.
Risks: bleeding or thrombosis due to poorly dosed anticoagulants; hypo/hyperglycemia; thyroid decompensations.
How to reduce risk: written schedule plan validated by your doctor, pill box with alarms, medication always in hand luggage and translated digital prescriptions.
