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.
In the legend, the god Huitzilopochtli told them they could not use the name Azteca, and they would be known as Mexica. The Aztec migration from Aztlan to TenochtitlÃ¡n is a very important piece of Aztec history. It began on May 24, 1064, which was the first Aztec solar year.