The Town of Taos sits at 7,500 feet of elevation and is on a dry high-desert plateau. It can take a few days to acclimate to the altitude, dryness and intense sun.
If you are just arriving from lower elevations or a long day of travel and are feeling the effect of altitude and dehydration, it is usually helpful to drink lots of water, with electrolytes if possible. Cids Food market on the North side of town sells single-serving electrolyte packs that you can drop into a water bottle.
It’s useful to keep in mind that, until you acclimate, coffee will likely dehydrate you more quickly and one alcoholic beverage may feel like you just drank three of them.