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.
Mexico City's ZÃ³calo, the Plaza de la ConstituciÃ³n, is located at the site of Tenochtitlan's original central plaza and market, and many of the original calzadas still correspond to modern city streets. The Aztec calendar stone was located in the ruins. This stone is 4 meters in diameter and weighs over 20 tons.