We'll arrive Cusco early morning second week of July and straight we'll go to Urubamba. Me and kids ages 11 and 15 had motion sickness problem. Please advise which medicine we should take before altitude sickness spoil our trip coz I'm very sensitive for motion sickness. If I take motion sickness medicine is that will work for altitude sickness as well or we should take Diamox (Acetazolamide)?...How I can get this medicine in USA?..Any pharmacy or doctor will have to recommend this? Please advise.