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.
Timing Is Everything. Indoors, you can safely leave a sandwich out for up to two hours after making it, according to the USDA. After that, bacteria starts to multiply rapidly. In hot weather the margin of safety is cut to one hour. Don't take chances. Refrigerate sandwiches or pack your lunch box with an ice pack.