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.
The real difference is in the method of delivery. Concerta is designed to be effective in the body for 12 hours. Ritalin has an effective period of from 4-6 hours. The longer-lasting Concerta is intended to eliminate the need to take medication during the school day.It is important to remember that the only thing new about Concerta is the sustained delivery system.he real difference is in the method of delivery. Concerta is designed to be effective in the body for 12 hours. Ritalin has an effective period of from 4-6 hours. The longer-lasting Concerta is intended to eliminate the need to take medication during the school day.