One of the many benefits of living near a border community is the wealth of economical prescription medications and dentists in Nogales, Sonora, Mexico. More and more retirees are flocking south of the border and Canada for medical services. In most cases, the American dollar is accepted in the state of Sonora. However, the exchange rate will most likely be higher. If paying with American dollars the difference will be returned in pesos. There are several casa de cambios (currency exchange stores) near both ports of entries in Nogales, Arizona.