When traveling to high-altitude cities like Mexico City, many travelers underestimate the impact of altitude sickness, a common but often overlooked issue. From my own experience, altitude sickness can hit suddenly and cause symptoms such as headaches, dizziness, nausea, and fatigue, which can quickly spoil your travel plans. I found altitude sickness patches incredibly helpful—they provide a gradual and steady release of medication through the skin, which can reduce symptoms effectively without the need to take pills continuously. On a recent trip, these patches were a lifesaver, along with some leftover altitude sickness pills from a previous trip to Guatemala. Together, they helped me maintain energy and focus despite the city’s elevation. Mexico City sits at around 2,240 meters (7,350 feet) above sea level, which is high enough to cause discomfort for those not acclimatized. Hydration is essential, so drinking plenty of water and avoiding alcohol can prevent dehydration, which worsens symptoms. Also, taking it slow on your first day—avoiding strenuous activity—allows your body to adjust. It's surprising how seldom travelers discuss altitude sickness when visiting big cities like Mexico City. Many assume it’s only a concern for mountain climbers or hikers. However, being informed and prepared can make a huge difference. If you’re planning a trip to high elevations, I recommend packing altitude sickness patches and consulting your doctor about appropriate medications. Also, monitoring your symptoms and listening to your body is key. A little prep goes a long way toward enjoying your time exploring without the distraction and discomfort of altitude sickness.