The mean time to onset of a 12% increase in FEV1 for PROVENTIL HFA Inhalation Aerosol was 7 minutes and the mean time to peak effect was approximately 50 minutes. The mean duration of effect as measured by a 12% increase in FEV1 was 2.3 hours. In some pediatric patients, duration of effect was as long as 6 hours.
The Aztecs, who probably originated as a nomadic tribe in northern Mexico, arrived in Mesoamerica around the beginning of the 13th century.
And so the Mexica peoples continued, and the Aztec Empire began. The city of Tenochitlan was soon to become one of the largest cities in the world. The power of the Mexica peoples became more consolidated, and they began to form alliances.Their military power grew as well, and they began to conquer peoples in the surrounding areas. At the height of its power, the Aztec Empire was organized and strong, but ruled with fear.he power of the Mexica peoples became more consolidated, and they began to form alliances. Their military power grew as well, and they began to conquer peoples in the surrounding areas. At the height of its power, the Aztec Empire was organized and strong, but ruled with fear.