Should I take Diamox for altitude, and does it replace going slowly?

The short answer

Diamox, the brand name for acetazolamide, is a prescription medicine that some doctors discuss for people who will gain altitude quickly or who have been affected before. It is not a substitute for a slow ascent, plenty of rest and a willingness to turn back. Whether it suits you, and what dose, is a decision for a doctor who knows your health.

Talk to your doctor or a travel clinic well before the trip, mention any allergies and other medicines, and do not start a medicine for the first time on the mountain without advice. The best protection is still the plan: build in acclimatisation days, drink regularly, avoid pushing on with symptoms and tell your guide early.