Should I take Diamox even if I feel fine?

Yes, many climbers take a prophylactic dose (usually 125mg twice a day). It helps your body breathe more efficiently and can significantly reduce the risk of mild altitude sickness.

What is the most common sign I should stop climbing?

A persistent, throbbing headache that does not respond to paracetamol or ibuprofen, accompanied by nausea or lack of appetite, is a major warning sign. Tell your lead guide immediately.

Preventing Altitude Sickness on Mount Kilimanjaro

Prevent altitude sickness by strictly adhering to a 'pole pole' (slowly, slowly) pace and prioritizing hydration by drinking 3 to 4 liters of water daily. Consult your doctor about taking acetazolamide (Diamox) before you begin your ascent to help your body acclimatize.

Choose a longer route. Select a route that takes at least 7 to 8 days, such as the Lemosho or Northern Circuit. Shorter 5-day routes do not provide enough time for your body to adjust to the thinning air.
Master the 'pole pole' pace. Walk significantly slower than you think you need to. If you are breathing heavily while walking, you are moving too fast. Your guides will dictate the pace—do not try to speed up.
Hydrate aggressively. Drink at least 3 to 4 liters of water every single day. High altitude dehydrates you rapidly, which exacerbates symptoms of mountain sickness.
Implement 'climb high, sleep low'. Whenever possible, hike to a higher elevation during the day and return to a lower campsite to sleep. This is the gold standard for acclimatization.
Monitor for HAPE and HACE. Learn the symptoms of High Altitude Pulmonary Edema (coughing up fluid) and High Altitude Cerebral Edema (confusion, lack of coordination). If these occur, you must descend immediately; there is no alternative.

Should I take Diamox even if I feel fine?: Yes, many climbers take a prophylactic dose (usually 125mg twice a day). It helps your body breathe more efficiently and can significantly reduce the risk of mild altitude sickness.
What is the most common sign I should stop climbing?: A persistent, throbbing headache that does not respond to paracetamol or ibuprofen, accompanied by nausea or lack of appetite, is a major warning sign. Tell your lead guide immediately.