1 Combined effects with other substances. 2  According to studies, abusing OTC medicines is associated with a higher risk of abusing alcohol or illicit drugs. 3  DXM is often a gateway drug, says James E. Lessenger, MD, who has studied OTC medicine abuse in California.
72km (45 miles) S of Mexico City; 45km (28 miles) NE of Cuernavaca. TepoztlÃ¡n is one of the strangest and most beautiful towns in Mexico. Largely undiscovered by foreign tourists, it occupies the floor of a broad, lush valley whose walls were formed by bizarrely shaped mountains that look like the work of some abstract expressionist giant.
Teotihuacan is one of the world's most impressive archaeological sites. The pyramid city, inhabited between 100 B.C. and 650 A.D., is located in a wide valley in Central Mexico on a height of aprox. 2,300 m, hence almost on the same level as the Mexican capital, which is only 50 km far.