Long-term use of Ritalin is defined as more than 2 weeks of daily dosing. Using Ritalin can result in a number of negative side effects, including motor tics, headache, seizures, or numbness, pain, or sensitivity of the extremities. More here on adverse effects caused by long-term use of Ritalin.
How can you recognize Ritalin addiction? Guidelines on how you can avoid getting addicted AND signs of Ritalin addiction here. More on Ritalin’s addictive potential in this article.