The first and foremost thing to prevent altitude sickness on Kilimanjaro is communication with your trekking leader or mountain crew about how you are feeling. The main factors that affect the incidence and severity of altitude sickness on Kilimanjaro are rate of ascent, altitude gained, exposure length, exertion level, hydration and diet, and use of medications. The best processes to prevent altitude sickness are:

• Acclimatization well before the climb
• Beginning in the best possible health and excellent level of physical fitness
• Walking slowly and steadily
• High water intake
• Walking high and sleeping low
• Eating and sleeping well
• Keeping warm
• Resting and relaxing
• Keeping a light day-pack
• Staying away from alcohol and smoking
• Taking dietary supplements like multi-vitamins or antioxidants
• Taking anti-altitude medications like Diamox
• Simulated altitude training before climbing
• Choosing a reputable Kilimanjaro operator