While you already have your answer, I thought I’d share this for anyone wanting to know a bit more about how Concerta works. The pills themselves use an osmotic-controlled release oral delivery system where part of the dose is given immediately and the rest is slowly given as the drug gets squeezed out a little hole (that’s drilled out by lasers!) by osmotic pressure. It’s really cool stuff and makes it quite different to Ritalin IR in how it feels and works.
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