The percentage of those of Hispanic origin in the United States who were of Mexican background in 2013. Another 9.5 percent were of Puerto Rican background, 3.7 percent Cuban, 3.7 percent Salvadoran, 3.3 percent Dominican and 2.4 percent Guatemalan.
Onset of effects occurs within 30-60 minutes after taking Concerta. After that, duration of action lasts from 8-12 hours. And the average times to reach peak plasma concentrations across all doses of Concerta occur between 6-10 hour s. The average half-life for Concerta in adults is about 3.5 hours.
Confidence votes 157. It usually lasts about three hours, but it can be more or less. This is assuming you are talking about rock/rap/pop concerts. Classical concerts are usually about an hour or two, but they can be long also. It usually lasts about three hours, but it can be more or less. This is assuming you are talking about rock/rap/pop concerts. Classical concerts are usually about an hour or two, but they can be long also.