Diamox is a medication which is generally taken as a preventive measure for altitude sickness and not to cure its symptoms. There is less risk of altitude sickness in this trek in comparison with the Everest base camp trek. However, we will give you the medication from the beginning as a precautionary step. There is nothing to worry as your trekking leaders are well equipped with first aid kits and sufficient Diamox pills. It is advisable to consult with your doctor about any allergic reactions or side-effects that the drug may have on you.